The plastics - Polyethylene
•Download as PPTX, PDF•
1 like•838 views
Polyethylene was first synthesized in 1898 by German chemist Hans von Pechmann by accident while heating diazomethane. In 1933, Reginald Gibson and Eric Fawcett at ICI Laboratories synthesized polyethylene as it is known today. Polyethylene has several characteristics including being an excellent electrical insulator, transparent or opaque, resistant to low temperatures, hygienic and safe, inert to chemical attack, an excellent moisture barrier, and economic. Polyethylene has many uses such as bags, coating ditches, food and industrial packaging, disposable nappies, serum bags, containers, pipes, bottles, and irrigation pipes. Polyethylene is recyclable and can be melted and transformed into new products like
Report
Share
Report
Share
Recommended
Polyethylene (PE)
This document discusses linear low density polyethylene (LLDPE) films and the role of additives in LLDPE films. It provides background on the production of polyethylene through different processes. It then focuses on LLDPE, describing its production methods, physical characteristics, and common uses in packaging films. The document outlines various types of additives used in LLDPE films, specifically mentioning antioxidants and masterbatches, which are concentrates of additives that enhance polymer properties for specific applications.
The Plastics - Polystryrene Polyurethane Polyethylene -
This document provides information on three common plastic polymers: polystyrene, polyurethane, and polyethylene. It discusses their origins and histories, properties, and applications. Polystyrene was discovered in 1839 and is a hard, brittle plastic used widely in packaging foams. Polyurethane was developed as a rubber replacement during WWII and has applications as coatings, adhesives, and flexible foams for insulation. Polyethylene was accidentally discovered in 1898 and is used today in products like bags, bottles, and pipes due to its moisture resistance and strength.
2 topic. food packaging materials
The document discusses food packaging materials. It describes the main purposes of food packaging as protecting contents from chemical, biological, and physical deterioration. Common packaging materials mentioned include glass, metals, paper/paperboard, and plastics. Specific materials discussed in more detail include aluminum, laminates, thermoplastics, and paperboard. The document also provides examples of innovative packaging like Tetra Pak cartons and examples of less recyclable packages like chip bags and toothpaste tubes. Site visits to Greek food companies Panini, Kandylas, Venus Growers, and a fish farm describe their use of various packaging materials and standards.
Food packaging technology
This document provides an overview of food packaging. It begins with brief introductions of the author and their background and qualifications. It then defines packaging and outlines its main functions. The document provides a brief history of important developments in food packaging. It discusses factors driving growth of the packaging industry in India and common packaging materials like glass, metal and plastic containers. It outlines requirements and types of food packaging and considerations for effective packaging. Finally, it discusses emerging packaging technologies.
Types of Food packaging materials .pptx
Packaging plays an important role in protecting foods and influencing their storage life and marketability. It acts as a barrier between foods and the environment. Different types of packaging materials include paper, plastic, wood, and more. Materials must have properties like being non-toxic, providing moisture and gas barriers, and allowing for visibility and easy disposal. Packaging can be classified by the stage of distribution and includes primary, secondary, and tertiary containers. New intelligent and biodegradable packaging technologies also aim to provide information on food quality while reducing environmental impact.
chapter 1.pdf
This document is a training material for injection mold design created by Akhmad Faizin. It includes 13 chapters that cover topics such as plastic materials, injection molding fundamentals, mold components, cooling and ejection systems. The document provides information on common plastic materials like ABS, polycarbonate, polyethylene, polypropylene, and PVC. It describes their properties, grades available, typical applications and processing methods. The document also includes a flow chart outlining the methodical design process for injection molds.
PLASTICS FOOD PACKAGING MATERIALS.pptx
Plastics, specifically thermoplastics, are widely used in food packaging due to their low cost, light weight, and versatility. The most common plastics used are polyolefins like polyethylene and polypropylene, as well as polyesters like polyethylene terephthalate. These plastics can be formed into rigid containers through blow molding or injection molding processes. Laminates and co-extruded plastics are also used to combine the properties of different materials and enhance barrier properties for food preservation. While plastics provide advantages for food packaging, some may absorb food constituents so testing is needed for food safety.
Polymer industries
These synthetic materials have added new manufacturing methods and supplemented metals, wood and even ceramics in construction.
Recommended
Polyethylene (PE)
This document discusses linear low density polyethylene (LLDPE) films and the role of additives in LLDPE films. It provides background on the production of polyethylene through different processes. It then focuses on LLDPE, describing its production methods, physical characteristics, and common uses in packaging films. The document outlines various types of additives used in LLDPE films, specifically mentioning antioxidants and masterbatches, which are concentrates of additives that enhance polymer properties for specific applications.
The Plastics - Polystryrene Polyurethane Polyethylene -
This document provides information on three common plastic polymers: polystyrene, polyurethane, and polyethylene. It discusses their origins and histories, properties, and applications. Polystyrene was discovered in 1839 and is a hard, brittle plastic used widely in packaging foams. Polyurethane was developed as a rubber replacement during WWII and has applications as coatings, adhesives, and flexible foams for insulation. Polyethylene was accidentally discovered in 1898 and is used today in products like bags, bottles, and pipes due to its moisture resistance and strength.
2 topic. food packaging materials
The document discusses food packaging materials. It describes the main purposes of food packaging as protecting contents from chemical, biological, and physical deterioration. Common packaging materials mentioned include glass, metals, paper/paperboard, and plastics. Specific materials discussed in more detail include aluminum, laminates, thermoplastics, and paperboard. The document also provides examples of innovative packaging like Tetra Pak cartons and examples of less recyclable packages like chip bags and toothpaste tubes. Site visits to Greek food companies Panini, Kandylas, Venus Growers, and a fish farm describe their use of various packaging materials and standards.
Food packaging technology
This document provides an overview of food packaging. It begins with brief introductions of the author and their background and qualifications. It then defines packaging and outlines its main functions. The document provides a brief history of important developments in food packaging. It discusses factors driving growth of the packaging industry in India and common packaging materials like glass, metal and plastic containers. It outlines requirements and types of food packaging and considerations for effective packaging. Finally, it discusses emerging packaging technologies.
Types of Food packaging materials .pptx
Packaging plays an important role in protecting foods and influencing their storage life and marketability. It acts as a barrier between foods and the environment. Different types of packaging materials include paper, plastic, wood, and more. Materials must have properties like being non-toxic, providing moisture and gas barriers, and allowing for visibility and easy disposal. Packaging can be classified by the stage of distribution and includes primary, secondary, and tertiary containers. New intelligent and biodegradable packaging technologies also aim to provide information on food quality while reducing environmental impact.
chapter 1.pdf
This document is a training material for injection mold design created by Akhmad Faizin. It includes 13 chapters that cover topics such as plastic materials, injection molding fundamentals, mold components, cooling and ejection systems. The document provides information on common plastic materials like ABS, polycarbonate, polyethylene, polypropylene, and PVC. It describes their properties, grades available, typical applications and processing methods. The document also includes a flow chart outlining the methodical design process for injection molds.
PLASTICS FOOD PACKAGING MATERIALS.pptx
Plastics, specifically thermoplastics, are widely used in food packaging due to their low cost, light weight, and versatility. The most common plastics used are polyolefins like polyethylene and polypropylene, as well as polyesters like polyethylene terephthalate. These plastics can be formed into rigid containers through blow molding or injection molding processes. Laminates and co-extruded plastics are also used to combine the properties of different materials and enhance barrier properties for food preservation. While plastics provide advantages for food packaging, some may absorb food constituents so testing is needed for food safety.
Polymer industries
These synthetic materials have added new manufacturing methods and supplemented metals, wood and even ceramics in construction.
Pharma Packaging Technology
This document discusses pharmaceutical packaging technology. It describes the different types of primary, secondary, and tertiary packaging used to surround pharmaceutical products from production to use. The functions of packaging include product identification, protection, facilitating usage, and promotion. The document also discusses various packaging materials, case studies on innovative drug packaging designs, regulatory requirements, and recent advancements in packaging technology.
POLYMERS : PLASTICS AND THERMOPLASTICS
This document provides an overview of plastics and rubber, including their history, key developments, types, properties, manufacturing processes, and recycling. Some of the main points covered include:
- The first man-made plastic was Parkesine created in 1862; major early developments included celluloid, Bakelite, and nylon.
- Thermoplastics can be remelted and remolded, while thermosets chemically decompose when heated.
- Plastics are lightweight, durable, versatile materials but take a long time to decompose without proper disposal and recycling.
sterilization dis inf
The document discusses sterilization and disinfection in dentistry. It begins with introducing the importance of sterilization due to the risk of transmission of infections from dental professionals to patients. It then defines key terms like sterilization, disinfection, antisepsis, and classifications. The document goes on to describe various sterilization methods including physical methods like heat and radiation, and chemical methods. It provides details on sterilization of dental instruments and monitoring sterilization effectiveness.
Project report on polystyrene (ps)
This document discusses polystyrene (PS), including its:
- History of discovery and early study in the 1800s.
- Manufacturing via polymerization of styrene monomer molecules.
- Various forms including expanded (EPS), extruded (XPS), and high impact (HIPS) polystyrene.
- Wide applications in packaging, consumer electronics, construction, and medical due to properties like rigidity, impact strength, and versatility.
- Environmental hazards from production and disposal processes.
- Potential for recycling to reduce waste and pollution.
How to do efficient food packaging?
This document provides an overview of food packaging, including definitions, functions, materials used, packaging methods, laws and regulations, and risks of contamination. It discusses how packaging contains and protects food, uses materials like metal, glass, plastic and paper, and methods like aseptic packaging, vacuum packaging and modified atmosphere packaging. The document also covers packaging laws and regulations as well as types of contamination risks and how mass transfer can impact food quality through the packaging process.
The Business Unit3lesson
The document discusses new product development and packaging considerations. It touches on explaining a product's functions, features, benefits, and competitive comparisons to sales staff. It also discusses key aspects of packaging including attracting attention, advertising benefits, listing contents, and protecting contents. Specific types of food packaging and important factors like recycling, design, information, and protection are examined. Research methods and potential ways to package items like an MP-Bunny toy and dealing with issues of injuries from difficult packaging are briefly outlined.
Packaging materials for bakery products prasad
we need to stress on packaging materials of bakery goods to prevent the loss of those goods and maintain self stability
Culture Media History and Types
DEFINITION
HISTORY OF CULTURE MEDIA
1) THE SEARCH FOR THE IDEAL MEDIUM
2) PETRI'S CONTRIBUTION
3) INTRODUCTION OF PEPTONE
4) BEGINNING OF AN INDUSTRY
REQUIREMENTS
COMMON MEDIA CONSTITUENTS
MEDIA INGREDIENTS
ENVIRONMENTAL FACTORS IN CULTURE MEDIA
TYPES OF CULTURE MEDIA
CULTURE METHODS
Packaging of Cleaning Products
Content: Introduction to Packaging,
Various Products,
Cleaning Products,
Ingredients of cleaning product,
Material Used,
Packaging Forms,
Testing Of Packaging,
Rules and regulations (organizations),
General rules for packaging.
Chemistry-The center of Science
This document provides an overview of chemistry and its central role in science and daily life. It discusses how chemistry has contributed to developments in areas such as electronics, medicine, food processing, forensics, and energy. Some key points made include that chemistry is fundamental to understanding the molecular world and has helped develop critical innovations like transistors, plastics, fertilizers, and medical diagnostics and treatments. The document emphasizes that nearly every aspect of modern life involves chemical developments and that chemistry is truly the central and connecting science.
Past, present & future of plastics
This document discusses the past, present, and future of plastics. It outlines the history of plastics from the first plastic invented in 1862 to modern polymers and applications. Currently, plastics are widely used in products like cars, medical devices, electronics, and more. The future of plastics may include 3D printing of body parts, bacteria-resistant varieties, and use in OLED displays. Plastics have become an important part of modern life due to their versatility, durability and low cost.
Oil pollution
Oil pollution poses serious threats to the environment. When oil is spilled into oceans and waterways, it can severely damage ecosystems and harm wildlife. Effective cleanup and prevention methods are needed to protect sensitive habitats and reduce negative impacts of oil pollution on the natural world.
The ozone hole
The document lists two names, Silvia Román and Paula Sánchez. It does not provide any other details about these individuals, such as their occupations, roles, or relationship to each other. In just mentioning these two names, the document gives very limited information that does not provide much context or insight.
Deforestation by Saul Mayordomo, Adrian george perez and Jose miguel perez hita
Deforestation by Saul Mayordomo, Adrian george perez and Jose miguel perez hita Antonio Saorín Pérez-muelas
The document discusses the issue of deforestation. It notes that around 11,000 years ago, 60% of the Earth was covered in forests but now only about 1/5 of land has forests. Deforestation occurs for various reasons like using trees for fuel, clearing land for agriculture, and development. This removal of trees without replanting has led to damage of habitats, loss of biodiversity, increased carbon dioxide in the atmosphere, soil erosion, and degraded wastelands. Reforestation efforts are needed to counter the effects of deforestation.Deforestation
The document summarizes the causes and effects of deforestation. It notes that around 11,000 years ago, 60% of the Earth was covered in forests but now only 1/5 remains due to clearing for various uses. Deforestation results in damage to habitats and biodiversity loss. It disrupts the water cycle and causes issues like soil erosion, flooding, and drought. Large amounts of carbon dioxide are also released into the atmosphere from burned or rotting trees. Reforestation efforts are needed to mitigate the effects of deforestation.
Pp fibras sinteticas
Polyester was first produced in England in the early 1930s under the name Terylene. In 1946, DuPont acquired the license to produce polyester in the US under the name Dacron. Lycra was invented in 1959 by chemist Joseph Shivers and patented by DuPont, who named it Lycra. It provides elasticity and quality in fabrics. Nylon was discovered by Wallace Hume Carothers in 1935 and first produced by DuPont in 1938. Rayon was the first manufactured fiber and is made from a natural polymer; its properties remained unchanged until high tenacity rayon was developed in the 1940s.
Composites
Composites are materials made from two or more constituent materials that are combined to produce unique properties. Concrete is a common composite made of cement (binder) and gravel (reinforcement), and rebar can be added to make it stronger. Plastics composites are made of synthetic polymers like hydrocarbons and alcohols. Dental composites are synthetic resins used as restorative materials and adhesives in dentistry. Polymer composites use long chains of bonded molecules called polymers, commonly known as plastics or resins. The earliest uses of composites date back to 1500 BC by ancient Egyptians and Mesopotamians who used mud and straw mixtures for building. Later, Mong
Nanotechnology, smart textiles, carbon nanotubes and nanoflakes.
This document discusses several topics related to nanotechnology:
- Carbon nanotubes are hexagonal networks of carbon that are just nanometers in size and have extraordinary mechanical and thermal properties. They were first discovered in 1991 and have applications in electronics.
- Smart textiles are fabrics that can function electrically through embedded computing and digital components. They originated in the 1990s for military use and now have applications in healthcare like monitoring vital signs.
- Nanoflakes are a new material discovered by Martin Aagesen that form a perfect crystalline structure allowing absorption of all light, making them promising for highly efficient solar cells. Their use could significantly reduce the cost of solar energy production.
PVC plastics
PVC is a polymer derived from sodium chloride and oil or natural gas. It is a white, odorless powder that is light, non-flammable, and resistant to chemicals and compression. PVC can be recycled and has many applications, as it does not degrade in water and has a long service life. Common uses of PVC include wire and pipe insulation, construction materials, toys, automotive parts, medical devices, and more.
Metacrilato y polipropileno
Este documento describe el metacrilato y el polipropileno, dos plásticos sintéticos. El metacrilato fue desarrollado en 1928 como un sustituto del vidrio que es más ligero y resistente a los golpes. Se usa comúnmente en ventanas, vitrinas y letreros. El polipropileno fue descubierto en 1954 y se ha utilizado ampliamente en la industria desde la década de 1950 debido a su resistencia química y mecánica. Ambos plásticos tienen muchas aplicaciones como materiales de
Coltan
Coltan is a black metallic ore that is mined primarily in the Congo. It was discovered by a pygmy man who used the stone to sharpen weapons. When refined, coltan becomes a heat-resistant powder that can hold a high electrical charge, making it useful for tantalum capacitors found in many electronic devices as well as high-temperature alloys for turbines. While controversial to exploit due to mining practices, coltan can be recycled and reused through proper waste management and smelting techniques.
More Related Content
Similar to The plastics - Polyethylene
Pharma Packaging Technology
This document discusses pharmaceutical packaging technology. It describes the different types of primary, secondary, and tertiary packaging used to surround pharmaceutical products from production to use. The functions of packaging include product identification, protection, facilitating usage, and promotion. The document also discusses various packaging materials, case studies on innovative drug packaging designs, regulatory requirements, and recent advancements in packaging technology.
POLYMERS : PLASTICS AND THERMOPLASTICS
This document provides an overview of plastics and rubber, including their history, key developments, types, properties, manufacturing processes, and recycling. Some of the main points covered include:
- The first man-made plastic was Parkesine created in 1862; major early developments included celluloid, Bakelite, and nylon.
- Thermoplastics can be remelted and remolded, while thermosets chemically decompose when heated.
- Plastics are lightweight, durable, versatile materials but take a long time to decompose without proper disposal and recycling.
sterilization dis inf
The document discusses sterilization and disinfection in dentistry. It begins with introducing the importance of sterilization due to the risk of transmission of infections from dental professionals to patients. It then defines key terms like sterilization, disinfection, antisepsis, and classifications. The document goes on to describe various sterilization methods including physical methods like heat and radiation, and chemical methods. It provides details on sterilization of dental instruments and monitoring sterilization effectiveness.
Project report on polystyrene (ps)
This document discusses polystyrene (PS), including its:
- History of discovery and early study in the 1800s.
- Manufacturing via polymerization of styrene monomer molecules.
- Various forms including expanded (EPS), extruded (XPS), and high impact (HIPS) polystyrene.
- Wide applications in packaging, consumer electronics, construction, and medical due to properties like rigidity, impact strength, and versatility.
- Environmental hazards from production and disposal processes.
- Potential for recycling to reduce waste and pollution.
How to do efficient food packaging?
This document provides an overview of food packaging, including definitions, functions, materials used, packaging methods, laws and regulations, and risks of contamination. It discusses how packaging contains and protects food, uses materials like metal, glass, plastic and paper, and methods like aseptic packaging, vacuum packaging and modified atmosphere packaging. The document also covers packaging laws and regulations as well as types of contamination risks and how mass transfer can impact food quality through the packaging process.
The Business Unit3lesson
The document discusses new product development and packaging considerations. It touches on explaining a product's functions, features, benefits, and competitive comparisons to sales staff. It also discusses key aspects of packaging including attracting attention, advertising benefits, listing contents, and protecting contents. Specific types of food packaging and important factors like recycling, design, information, and protection are examined. Research methods and potential ways to package items like an MP-Bunny toy and dealing with issues of injuries from difficult packaging are briefly outlined.
Packaging materials for bakery products prasad
we need to stress on packaging materials of bakery goods to prevent the loss of those goods and maintain self stability
Culture Media History and Types
DEFINITION
HISTORY OF CULTURE MEDIA
1) THE SEARCH FOR THE IDEAL MEDIUM
2) PETRI'S CONTRIBUTION
3) INTRODUCTION OF PEPTONE
4) BEGINNING OF AN INDUSTRY
REQUIREMENTS
COMMON MEDIA CONSTITUENTS
MEDIA INGREDIENTS
ENVIRONMENTAL FACTORS IN CULTURE MEDIA
TYPES OF CULTURE MEDIA
CULTURE METHODS
Packaging of Cleaning Products
Content: Introduction to Packaging,
Various Products,
Cleaning Products,
Ingredients of cleaning product,
Material Used,
Packaging Forms,
Testing Of Packaging,
Rules and regulations (organizations),
General rules for packaging.
Chemistry-The center of Science
This document provides an overview of chemistry and its central role in science and daily life. It discusses how chemistry has contributed to developments in areas such as electronics, medicine, food processing, forensics, and energy. Some key points made include that chemistry is fundamental to understanding the molecular world and has helped develop critical innovations like transistors, plastics, fertilizers, and medical diagnostics and treatments. The document emphasizes that nearly every aspect of modern life involves chemical developments and that chemistry is truly the central and connecting science.
Past, present & future of plastics
This document discusses the past, present, and future of plastics. It outlines the history of plastics from the first plastic invented in 1862 to modern polymers and applications. Currently, plastics are widely used in products like cars, medical devices, electronics, and more. The future of plastics may include 3D printing of body parts, bacteria-resistant varieties, and use in OLED displays. Plastics have become an important part of modern life due to their versatility, durability and low cost.
Similar to The plastics - Polyethylene (11)
More from Antonio Saorín Pérez-muelas
Oil pollution
Oil pollution poses serious threats to the environment. When oil is spilled into oceans and waterways, it can severely damage ecosystems and harm wildlife. Effective cleanup and prevention methods are needed to protect sensitive habitats and reduce negative impacts of oil pollution on the natural world.
The ozone hole
The document lists two names, Silvia Román and Paula Sánchez. It does not provide any other details about these individuals, such as their occupations, roles, or relationship to each other. In just mentioning these two names, the document gives very limited information that does not provide much context or insight.
Deforestation by Saul Mayordomo, Adrian george perez and Jose miguel perez hita
Deforestation by Saul Mayordomo, Adrian george perez and Jose miguel perez hita Antonio Saorín Pérez-muelas
The document discusses the issue of deforestation. It notes that around 11,000 years ago, 60% of the Earth was covered in forests but now only about 1/5 of land has forests. Deforestation occurs for various reasons like using trees for fuel, clearing land for agriculture, and development. This removal of trees without replanting has led to damage of habitats, loss of biodiversity, increased carbon dioxide in the atmosphere, soil erosion, and degraded wastelands. Reforestation efforts are needed to counter the effects of deforestation.Deforestation
The document summarizes the causes and effects of deforestation. It notes that around 11,000 years ago, 60% of the Earth was covered in forests but now only 1/5 remains due to clearing for various uses. Deforestation results in damage to habitats and biodiversity loss. It disrupts the water cycle and causes issues like soil erosion, flooding, and drought. Large amounts of carbon dioxide are also released into the atmosphere from burned or rotting trees. Reforestation efforts are needed to mitigate the effects of deforestation.
Pp fibras sinteticas
Polyester was first produced in England in the early 1930s under the name Terylene. In 1946, DuPont acquired the license to produce polyester in the US under the name Dacron. Lycra was invented in 1959 by chemist Joseph Shivers and patented by DuPont, who named it Lycra. It provides elasticity and quality in fabrics. Nylon was discovered by Wallace Hume Carothers in 1935 and first produced by DuPont in 1938. Rayon was the first manufactured fiber and is made from a natural polymer; its properties remained unchanged until high tenacity rayon was developed in the 1940s.
Composites
Composites are materials made from two or more constituent materials that are combined to produce unique properties. Concrete is a common composite made of cement (binder) and gravel (reinforcement), and rebar can be added to make it stronger. Plastics composites are made of synthetic polymers like hydrocarbons and alcohols. Dental composites are synthetic resins used as restorative materials and adhesives in dentistry. Polymer composites use long chains of bonded molecules called polymers, commonly known as plastics or resins. The earliest uses of composites date back to 1500 BC by ancient Egyptians and Mesopotamians who used mud and straw mixtures for building. Later, Mong
Nanotechnology, smart textiles, carbon nanotubes and nanoflakes.
This document discusses several topics related to nanotechnology:
- Carbon nanotubes are hexagonal networks of carbon that are just nanometers in size and have extraordinary mechanical and thermal properties. They were first discovered in 1991 and have applications in electronics.
- Smart textiles are fabrics that can function electrically through embedded computing and digital components. They originated in the 1990s for military use and now have applications in healthcare like monitoring vital signs.
- Nanoflakes are a new material discovered by Martin Aagesen that form a perfect crystalline structure allowing absorption of all light, making them promising for highly efficient solar cells. Their use could significantly reduce the cost of solar energy production.
PVC plastics
PVC is a polymer derived from sodium chloride and oil or natural gas. It is a white, odorless powder that is light, non-flammable, and resistant to chemicals and compression. PVC can be recycled and has many applications, as it does not degrade in water and has a long service life. Common uses of PVC include wire and pipe insulation, construction materials, toys, automotive parts, medical devices, and more.
Metacrilato y polipropileno
Este documento describe el metacrilato y el polipropileno, dos plásticos sintéticos. El metacrilato fue desarrollado en 1928 como un sustituto del vidrio que es más ligero y resistente a los golpes. Se usa comúnmente en ventanas, vitrinas y letreros. El polipropileno fue descubierto en 1954 y se ha utilizado ampliamente en la industria desde la década de 1950 debido a su resistencia química y mecánica. Ambos plásticos tienen muchas aplicaciones como materiales de
Coltan
Coltan is a black metallic ore that is mined primarily in the Congo. It was discovered by a pygmy man who used the stone to sharpen weapons. When refined, coltan becomes a heat-resistant powder that can hold a high electrical charge, making it useful for tantalum capacitors found in many electronic devices as well as high-temperature alloys for turbines. While controversial to exploit due to mining practices, coltan can be recycled and reused through proper waste management and smelting techniques.
Polystyrene
Polystyrene is a synthetic polymer made from styrene monomer. It can be rigid or foamed, and general polystyrene is clear, hard and brittle. Polystyrene was discovered in 1839 by Eduard Simon and has a variety of applications including packaging, insulation and construction. While polystyrene has good thermal and electrical insulation properties, it is not widely recycled due to its non-biodegradable nature which poses environmental challenges.
Cmc
Carbon fibers are composed of carbon atoms bonded together in sheets, similar to graphite. They were first created in 1958 and are now made from petroleum pitch. Carbon fibers have high strength and stiffness but low density, making them useful for applications in aerospace, automotive, sports equipment, and other industries where lightweight strength is important.
CARBON FIBRE, GLASS FIBRE AND OPTICAL FIBRE
Carbon fibers are composed of carbon atoms bonded together in sheets, similar to graphite. They were first created in 1958 and are made by heating rayon or petroleum pitch. Carbon fibers have high strength and stiffness but low density, and are used in aerospace, automotive, sports equipment, and other applications.
Aluminium, titanium, biochips and biosensors
This document summarizes information about aluminium, titanium, biochips, and biosensors. It describes aluminium and titanium as lightweight metals that are abundant in nature. Aluminium is a silvery white metal commonly used in transportation, construction, and packaging. Titanium is stronger than steel and highly corrosion resistant, making it useful in aerospace applications and implants. The document also notes that biochips can perform many biochemical reactions simultaneously for screening and detection, while biosensors combine biological and physical elements to detect analytes.
Aluminium. Titanium. Biochips. Biosensors
Aluminum and titanium are described along with their properties and common uses. Aluminum is a light, silvery metal that is abundant in nature and commonly used in electricity, transportation, construction and packaging. It can be recycled infinitely without loss of properties. Titanium is also described with its discovery, properties as a transition metal, and common uses in alloys, aerospace, surgery and other industries. Biochips and biosensors are also summarized, with biochips enabling simultaneous biochemical reactions for screening and detection, while biosensors combine a biological component with a transducer and detector for analytical purposes.
ACERO Y ACERO INOXIDABLE, Natalia M. Carmen G.
The document discusses steel and stainless steel. It defines steel as an alloy of iron with carbon as the primary alloying element. Steel was first produced around 4,000 years ago and is strong, resistant to corrosion, and 100% recyclable. Stainless steel is an alloy of iron, chromium, and nickel that does not rust or stain easily. It was discovered in 1913 and is used widely in cookware, buildings, transportation and industrial equipment due to its corrosion resistance, strength and recyclability. Both steel and stainless steel can be recycled repeatedly without loss of quality, saving resources and reducing environmental impact with each recycling.
Natural rubber, synthetic rubber and neoprene rubber
This document discusses three types of rubber: natural rubber, synthetic rubber, and neoprene rubber. Natural rubber comes from latex and trees, was used by ancient civilizations, and is used today mainly for tires and hoses. Synthetic rubber is made from petroleum, was invented in 1909 as a cheaper alternative to natural rubber, and accounts for two-thirds of rubber production today. Neoprene is a synthetic rubber made from chloroprene polymerization that is chemically stable over a wide temperature range and used for products like wetsuits and boots.
Silicon y graphene
Silicon is a chemical element with an atomic mass of 14 that occurs in crystal or amorphous form. It is a semiconductor used in electronic chips, solar cells, and other technologies due to its strength, thermal conductivity, and elasticity. Graphene is an allotrope of carbon consisting of a single layer of carbon atoms arranged in a hexagonal lattice. It was discovered in 2004 by Andre Geim and Konstantin Novoselov, who won the Nobel Prize. Graphene has unique properties including high strength, thermal and electrical conductivity, and transparency. Potential uses include shielding, electronics, vehicles, and information technologies.
Ardi
Ardipithecus is a genus of early hominid found in Ethiopia that lived approximately 4.4 million years ago. It is considered a descendant of Orrorin tugenensis and a direct ancestor of australopithecines. There were two species, A. ramidus and A. kadabba. A. ramidus had a skull similar in size to great apes and evidence shows it moved in a bipedal manner. New evidence from the Aramis site in Ethiopia, where a partial skeleton of A. ramidus was found, indicates through sedimentological and isotopic analysis that it lived in a river-margin forest within a savanna landscape, in
More from Antonio Saorín Pérez-muelas (20)
Deforestation by Saul Mayordomo, Adrian george perez and Jose miguel perez hita
Deforestation by Saul Mayordomo, Adrian george perez and Jose miguel perez hita
Nanotechnology, smart textiles, carbon nanotubes and nanoflakes.
Nanotechnology, smart textiles, carbon nanotubes and nanoflakes.
Natural rubber, synthetic rubber and neoprene rubber
Natural rubber, synthetic rubber and neoprene rubber
Recently uploaded
220711130083 SUBHASHREE RAKSHIT Internet resources for social science
Internet resources for social science
THE SACRIFICE HOW PRO-PALESTINE PROTESTS STUDENTS ARE SACRIFICING TO CHANGE T...
The recent surge in pro-Palestine student activism has prompted significant responses from universities, ranging from negotiations and divestment commitments to increased transparency about investments in companies supporting the war on Gaza. This activism has led to the cessation of student encampments but also highlighted the substantial sacrifices made by students, including academic disruptions and personal risks. The primary drivers of these protests are poor university administration, lack of transparency, and inadequate communication between officials and students. This study examines the profound emotional, psychological, and professional impacts on students engaged in pro-Palestine protests, focusing on Generation Z's (Gen-Z) activism dynamics. This paper explores the significant sacrifices made by these students and even the professors supporting the pro-Palestine movement, with a focus on recent global movements. Through an in-depth analysis of printed and electronic media, the study examines the impacts of these sacrifices on the academic and personal lives of those involved. The paper highlights examples from various universities, demonstrating student activism's long-term and short-term effects, including disciplinary actions, social backlash, and career implications. The researchers also explore the broader implications of student sacrifices. The findings reveal that these sacrifices are driven by a profound commitment to justice and human rights, and are influenced by the increasing availability of information, peer interactions, and personal convictions. The study also discusses the broader implications of this activism, comparing it to historical precedents and assessing its potential to influence policy and public opinion. The emotional and psychological toll on student activists is significant, but their sense of purpose and community support mitigates some of these challenges. However, the researchers call for acknowledging the broader Impact of these sacrifices on the future global movement of FreePalestine.
欧洲杯下注-欧洲杯下注押注官网-欧洲杯下注押注网站|【网址🎉ac44.net🎉】
【网址🎉ac44.net🎉】欧洲杯下注在体育博彩方面，不难发现，欧洲杯下注多为英式运动提供投注。欧洲杯下注为丰富多彩的体育项目提供投注，如足球、赛马、板球和飞镖，但这不是欧洲杯下注的唯一优势。在欧洲杯下注，全世界玩家都可以找到自己感兴趣的比赛进行投注。欧洲杯下注为网球和美式运动如棒球、美式足球、篮球、冰球开出的投注同样值得关注。在夏季或冬季奥运会方面，欧洲杯下注为玩家开出了丰富多彩的服务，是你的不二之选。你还可以投注水球、自行车和班迪球等小众体育项目，甚至可以为武术、拳击和综合格斗投注。欧洲杯下注为众多体育项目开出滚球投注。
Accounting for Restricted Grants When and How To Record Properly
In this webinar, member learned how to stay in compliance with generally accepted accounting principles (GAAP) for restricted grants.
Level 3 NCEA - NZ: A Nation In the Making 1872 - 1900 SML.ppt
The History of NZ 1870-1900.
Making of a Nation.
From the NZ Wars to Liberals,
Richard Seddon, George Grey,
Social Laboratory, New Zealand,
Confiscations, Kotahitanga, Kingitanga, Parliament, Suffrage, Repudiation, Economic Change, Agriculture, Gold Mining, Timber, Flax, Sheep, Dairying,
Temple of Asclepius in Thrace. Excavation results
The temple and the sanctuary around were dedicated to Asklepios Zmidrenus. This name has been known since 1875 when an inscription dedicated to him was discovered in Rome. The inscription is dated in 227 AD and was left by soldiers originating from the city of Philippopolis (modern Plovdiv).
Geography as a Discipline Chapter 1 __ Class 11 Geography NCERT _ Class Notes...
Geography as discipline
Contiguity Of Various Message Forms - Rupam Chandra.pptx
Contiguity Of Various Message Forms - Rupam Chandra.pptx
NIPER 2024 MEMORY BASED QUESTIONS.ANSWERS TO NIPER 2024 QUESTIONS.NIPER JEE 2...
NIPER JEE PYQ
NIPER JEE QUESTIONS
MOST FREQUENTLY ASK QUESTIONS
NIPER MEMORY BASED QUWSTIONS
How to Download & Install Module From the Odoo App Store in Odoo 17
Custom modules offer the flexibility to extend Odoo's capabilities, address unique requirements, and optimize workflows to align seamlessly with your organization's processes. By leveraging custom modules, businesses can unlock greater efficiency, productivity, and innovation, empowering them to stay competitive in today's dynamic market landscape. In this tutorial, we'll guide you step by step on how to easily download and install modules from the Odoo App Store.
Educational Technology in the Health Sciences
Plenary presentation at the NTTC Inter-university Workshop, 18 June 2024, Manila Prince Hotel.
A Visual Guide to 1 Samuel | A Tale of Two Hearts
These slides walk through the story of 1 Samuel. Samuel is the last judge of Israel. The people reject God and want a king. Saul is anointed as the first king, but he is not a good king. David, the shepherd boy is anointed and Saul is envious of him. David shows honor while Saul continues to self destruct.
A Free 200-Page eBook ~ Brain and Mind Exercise.pptx
(A Free eBook comprising 3 Sets of Presentation of a selection of Puzzles, Brain Teasers and Thinking Problems to exercise both the mind and the Right and Left Brain. To help keep the mind and brain fit and healthy. Good for both the young and old alike.
Answers are given for all the puzzles and problems.)
With Metta,
Bro. Oh Teik Bin 🙏🤓🤔🥰
Recently uploaded (20)
220711130083 SUBHASHREE RAKSHIT Internet resources for social science
220711130083 SUBHASHREE RAKSHIT Internet resources for social science
THE SACRIFICE HOW PRO-PALESTINE PROTESTS STUDENTS ARE SACRIFICING TO CHANGE T...
THE SACRIFICE HOW PRO-PALESTINE PROTESTS STUDENTS ARE SACRIFICING TO CHANGE T...
Accounting for Restricted Grants When and How To Record Properly
Accounting for Restricted Grants When and How To Record Properly
Level 3 NCEA - NZ: A Nation In the Making 1872 - 1900 SML.ppt
Level 3 NCEA - NZ: A Nation In the Making 1872 - 1900 SML.ppt
Geography as a Discipline Chapter 1 __ Class 11 Geography NCERT _ Class Notes...
Geography as a Discipline Chapter 1 __ Class 11 Geography NCERT _ Class Notes...
Contiguity Of Various Message Forms - Rupam Chandra.pptx
Contiguity Of Various Message Forms - Rupam Chandra.pptx
220711130097 Tulip Samanta Concept of Information and Communication Technology
220711130097 Tulip Samanta Concept of Information and Communication Technology
NIPER 2024 MEMORY BASED QUESTIONS.ANSWERS TO NIPER 2024 QUESTIONS.NIPER JEE 2...
NIPER 2024 MEMORY BASED QUESTIONS.ANSWERS TO NIPER 2024 QUESTIONS.NIPER JEE 2...
How to Download & Install Module From the Odoo App Store in Odoo 17
How to Download & Install Module From the Odoo App Store in Odoo 17
A Free 200-Page eBook ~ Brain and Mind Exercise.pptx
A Free 200-Page eBook ~ Brain and Mind Exercise.pptx
The plastics - Polyethylene
- 1. The Plastics Polyethylene Adrián George Pérez Pérez Antonio Saorín Pérez-Muelas José Miguel Pérez-Hita Moreno
- 2. The Accident ! • Polyethylene was first synthesized by German chemist Hans von Pechmann who prepared it by accident in 1898, while heating diazomethane on the stove. When his colleagues Eugen Bamberger and Friedrich Tschirner investigated the white oily substance created, they discovered long chains composed of-CH2-and called it polymethylene. March 27, 1933, in England, was synthesized as we know it today, by Reginald Gibson and Eric Fawcett who worked for ICI Laboratories.
- 3. Characteristics • • • • • • • Excellent electrical insulator. . Transparent, opaque or attractive colors. . Resistant to low temperatures. . Hygienic and safe. . Inert to chemical attack. . Excellent moisture barrier. . Economic.
- 4. Its Uses • All sorts of bags : supermarkets, boutiques,bakery,frosts etc. • Coating ditches • Automatic food packaging and industrial products, such as Milk, water, plastics, etc. • Base for disposable nappies. • Serum bags. • Domestic airtight containers • Pipes and knobs: cosmetics, medicines and food • Irrigation pipes • Bottles , draws
- 5. Recycling ! The Polyethylene is recyclable,it means, that we can melt it again and transform it in new products such as plastic wood for sticks film for agriculture etc.