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.
Melamine resin or melamine formaldehyde is a hard, thermosetting plastic material made from melamine and formaldehyde by polymerization. The presentation includes the preparation of MF, its properties and applications.
Melamine resin or melamine formaldehyde is a hard, thermosetting plastic material made from melamine and formaldehyde by polymerization. The presentation includes the preparation of MF, its properties and applications.
Introduction, types, raw material, reaction mechanism, manufacturing process, flow sheet of production process, properties, applications, industries in India, commercial name
Natural Rubber - Sources, Coagulation & Processing of Coagulate, Structure & ...Geevarghese George
Sources, Plantation Economy
Coagulation & Processing of Coagulate
Structure & Composition
Properties of raw NR
Compounding, Processing of NR
Properties of NR vulcanizates
Uses of NR
Competitive products of NR
poly styrene is a synthetic aromatic polymer made from the monomer styrene. Polystyrene can be solid or foamed. General purpose polystyrene is clear, hard, and rather brittle. It is an inexpensive resin per unit weight. polystyrene is in a solid (glassy) state at room temperature but flows if heated above about 100 °C, its glass transition temperature. It becomes rigid again when cooled .
Plastics has been evolving now a days. Our lives has been filled with plastics. Almost all of our things are made of plastics but do you what it is and what it is made of?
One of the most common and widely used plastic is polyethylene or PE with the resin codes 2 and 4. It is mostly used as plastic bags, food wraps, bulletproof vest, pipes and so many more. Here is a little preview of polyethylene and what is its purpose in our daily lives.
What is polyethylene?
Its properties, structure and applications.
slides contain some information about polycarbonate, as follow:
- History
- What is PC?
- Structure
- Production
- Processing
- Manufacturing & Block diagram
- Properties
- Applications
Bring extreme durability to Polyurethane formulationsSpecialChem
Polycarbonate Diols bring superior and long-term retention of designed Polyurethane performance. Discover the 6 reasons to use Eternacoll® polycarbonate diols in PU formulations!
Introduction, types, raw material, reaction mechanism, manufacturing process, flow sheet of production process, properties, applications, industries in India, commercial name
Natural Rubber - Sources, Coagulation & Processing of Coagulate, Structure & ...Geevarghese George
Sources, Plantation Economy
Coagulation & Processing of Coagulate
Structure & Composition
Properties of raw NR
Compounding, Processing of NR
Properties of NR vulcanizates
Uses of NR
Competitive products of NR
poly styrene is a synthetic aromatic polymer made from the monomer styrene. Polystyrene can be solid or foamed. General purpose polystyrene is clear, hard, and rather brittle. It is an inexpensive resin per unit weight. polystyrene is in a solid (glassy) state at room temperature but flows if heated above about 100 °C, its glass transition temperature. It becomes rigid again when cooled .
Plastics has been evolving now a days. Our lives has been filled with plastics. Almost all of our things are made of plastics but do you what it is and what it is made of?
One of the most common and widely used plastic is polyethylene or PE with the resin codes 2 and 4. It is mostly used as plastic bags, food wraps, bulletproof vest, pipes and so many more. Here is a little preview of polyethylene and what is its purpose in our daily lives.
What is polyethylene?
Its properties, structure and applications.
slides contain some information about polycarbonate, as follow:
- History
- What is PC?
- Structure
- Production
- Processing
- Manufacturing & Block diagram
- Properties
- Applications
Bring extreme durability to Polyurethane formulationsSpecialChem
Polycarbonate Diols bring superior and long-term retention of designed Polyurethane performance. Discover the 6 reasons to use Eternacoll® polycarbonate diols in PU formulations!
Synthesis of graphene oxide-TiO2 nanocomposite as an adsorbent for the enrich...Nanomedicine Journal (NMJ)
Abstract
Objective(s):
In our study, graphene oxide-TiO2 nanocomposite (GO/TiO2) was prepared and used for the enrichment of rutin from real samples for the first time.
Materials and Methods:
The synthesized GO/TiO2 was characterized by X-ray diffraction, scanning electron microscopy, and FT-IR spectra. The enrichment process is fast and highly efficient. The factors including contact time, pH, and amount of GO/TiO2 affecting the adsorption process were studied.
Results:
The maximum adsorption capacity for ciprofloxacin was calculated to be 59.5 mg/g according to the Langmuir adsorption isotherm. The method yielded a linear calibration curve in the concentration ranges from 15 to 200 μg/L for the rutin with regression coefficients (r2) of 0.9990. The limits of detection (LODs, S/N=3) and limits of quantification (LOQs, S/N=10) were found to be 8 μg/Land 28 μg/L, respectively. Both the intra-day and inter-day precisions (RSDs) were < 10% .
Conclusion:
The developed approach offered wide linear range, and good reproducibility. Owing to the diverse structures and unique characteristic, GO/TiO2 possesses great potential in the enrichment and analysis of trace rutin in real aqueous samples.
Nuevos horizontes comerciales en mercados emergentes, China por Antonio de la Morena. Coyuntura del mercado Chino como potencial turístico para Andalucía, Tendencias y Comportamientos del Turista Chino, Visión sobre estrategias adecuadas para atraer al turista chino a Andalucía.
Plastik Malzemelerin tasarımı ve Plastik Uygulamaları
Yönlendirilmiş Çalışma Bitirme Projesi 2016 Beykent MYO Makine Türkçe Turkish Plastic Part Design Details
Gel is a soft solid which contains both solid & liquid components where the solid component (gelator) is present as a mesh/network of aggregates, which immobilizes the liquid component
In this presentation, the chemical composition of rigid polyurethane foams was studied using FTIR microscopy and diffuse reflectance Fourier transform spectroscopy (DRIFTS) FTIR.
For more information, go to ssi.shimadzu.com and follow Shiamdzu on Twitter @ShimadzuSSI. Thanks for viewing!
"Beat Plastic Pollution" is a presentation by Dr. Amrit Krishna Mitra, Assistant Professor, Department Of Chemistry, Singur Government College, West Bengal, India. In this presentation he discusses the chemistry & history of Plastics, its benefits etc., as well as the detrimental effects of plastic on the environment, and finally ways towards the resolution.
https://www.sciencesg.com/scientificity/beat-plastic-pollution/
Many materials in day to day use are made from natural and synthetic polymers as constituents. Polymer based industries are products of research and development.
🔥 Attention all engineers and tech enthusiasts! 🔥
Do you know that there's a world of non-metal materials just waiting to revolutionize the field of engineering? 🌍💡
Imagine a future where durable, lightweight, and corrosion-resistant materials take center stage in our infrastructure projects, automotive designs, and even space exploration missions. 🚀✨
From advanced ceramics to polymers, composites, and even biomaterials, the possibilities are endless! 💫✨
But why should we be excited about non-metal materials in the first place? 🤔
Here are just a few reasons:
1️⃣ Improved Performance: Non-metal materials offer exceptional strength-to-weight ratios, allowing engineers to design cutting-edge structures that are both strong and lightweight. 🏗️🌈
2️⃣ Corrosion Resistance: Say goodbye to rust and erosion! Non-metal materials can withstand harsh environments, making them ideal for applications in marine, chemical, and even aerospace industries. 🌊🛰️
3️⃣ Design Flexibility: With non-metal materials, engineers have the freedom to create complex shapes and designs that were once thought impossible. This opens up a world of opportunities for innovative and aesthetically pleasing products. 🎨🔩
4️⃣ Energy Efficiency: Non-metal materials often offer better insulation properties, reducing energy consumption and contributing to a greener future. 🌿💡
So, let's celebrate the incredible potential of non-metal materials in engineering and embrace a future where strength, durability, and sustainability go hand in hand. 🌟🏗️
Tag a fellow engineer or industry professional who should be part of this transformative journey. Together, let's shape a world where innovation knows no bounds! 💪🌎✨
#EngineeringRevolution #NonMetalMaterials #InnovationUnleashed #FutureOfEngineering #TechEnthusiasts #LimitlessPossibilities
Environmentally friendly polymer composites: our past, ongoing studies and fu...zenziyan
THE PLENARY PRESENTATION ON II INTERNATIONAL SCIENTIFIC CONFERENCE 'THE MODERN TECHNOLOGIES OF POLYMER MATERIALS OBTAINING AND PROCESSING' (TPM-2019) at November 06–08, 2019, LVIV, UKRAINE
Plastic food packaging refers to the use of plastic materials to store and preserve food items. Plastic packaging can be in various forms such as bags, containers, bottles, and wraps.
The benefits of plastic food packaging include its durability, flexibility, and light weight, which make it easy to transport and store food items. Plastic packaging can also provide an effective barrier against moisture, oxygen, and other contaminants that can spoil food, thereby increasing the shelf life of food products.
How to Create Map Views in the Odoo 17 ERPCeline George
The map views are useful for providing a geographical representation of data. They allow users to visualize and analyze the data in a more intuitive manner.
Welcome to TechSoup New Member Orientation and Q&A (May 2024).pdfTechSoup
In this webinar you will learn how your organization can access TechSoup's wide variety of product discount and donation programs. From hardware to software, we'll give you a tour of the tools available to help your nonprofit with productivity, collaboration, financial management, donor tracking, security, and more.
The French Revolution, which began in 1789, was a period of radical social and political upheaval in France. It marked the decline of absolute monarchies, the rise of secular and democratic republics, and the eventual rise of Napoleon Bonaparte. This revolutionary period is crucial in understanding the transition from feudalism to modernity in Europe.
For more information, visit-www.vavaclasses.com
Model Attribute Check Company Auto PropertyCeline George
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The Roman Empire A Historical Colossus.pdfkaushalkr1407
The Roman Empire, a vast and enduring power, stands as one of history's most remarkable civilizations, leaving an indelible imprint on the world. It emerged from the Roman Republic, transitioning into an imperial powerhouse under the leadership of Augustus Caesar in 27 BCE. This transformation marked the beginning of an era defined by unprecedented territorial expansion, architectural marvels, and profound cultural influence.
The empire's roots lie in the city of Rome, founded, according to legend, by Romulus in 753 BCE. Over centuries, Rome evolved from a small settlement to a formidable republic, characterized by a complex political system with elected officials and checks on power. However, internal strife, class conflicts, and military ambitions paved the way for the end of the Republic. Julius Caesar’s dictatorship and subsequent assassination in 44 BCE created a power vacuum, leading to a civil war. Octavian, later Augustus, emerged victorious, heralding the Roman Empire’s birth.
Under Augustus, the empire experienced the Pax Romana, a 200-year period of relative peace and stability. Augustus reformed the military, established efficient administrative systems, and initiated grand construction projects. The empire's borders expanded, encompassing territories from Britain to Egypt and from Spain to the Euphrates. Roman legions, renowned for their discipline and engineering prowess, secured and maintained these vast territories, building roads, fortifications, and cities that facilitated control and integration.
The Roman Empire’s society was hierarchical, with a rigid class system. At the top were the patricians, wealthy elites who held significant political power. Below them were the plebeians, free citizens with limited political influence, and the vast numbers of slaves who formed the backbone of the economy. The family unit was central, governed by the paterfamilias, the male head who held absolute authority.
Culturally, the Romans were eclectic, absorbing and adapting elements from the civilizations they encountered, particularly the Greeks. Roman art, literature, and philosophy reflected this synthesis, creating a rich cultural tapestry. Latin, the Roman language, became the lingua franca of the Western world, influencing numerous modern languages.
Roman architecture and engineering achievements were monumental. They perfected the arch, vault, and dome, constructing enduring structures like the Colosseum, Pantheon, and aqueducts. These engineering marvels not only showcased Roman ingenuity but also served practical purposes, from public entertainment to water supply.
Students, digital devices and success - Andreas Schleicher - 27 May 2024..pptxEduSkills OECD
Andreas Schleicher presents at the OECD webinar ‘Digital devices in schools: detrimental distraction or secret to success?’ on 27 May 2024. The presentation was based on findings from PISA 2022 results and the webinar helped launch the PISA in Focus ‘Managing screen time: How to protect and equip students against distraction’ https://www.oecd-ilibrary.org/education/managing-screen-time_7c225af4-en and the OECD Education Policy Perspective ‘Students, digital devices and success’ can be found here - https://oe.cd/il/5yV
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An EFL lesson about the current events in Palestine. It is intended to be for intermediate students who wish to increase their listening skills through a short lesson in power point.
Unit 8 - Information and Communication Technology (Paper I).pdfThiyagu K
This slides describes the basic concepts of ICT, basics of Email, Emerging Technology and Digital Initiatives in Education. This presentations aligns with the UGC Paper I syllabus.
3. Description:
• Polystyrene is a synthetic polymer made from
the monomer styrene, a liquid petrochemical.
• Polystyrene can be rigid or foamed.
• General polystyrene is clear, hard and brittle.
• It is a very inexpensive resin per unit weight.
• It is a rather poor barrier to oxygen and water
vapor.
4. Origin and history:
• Polystyrene was discovered in 1839 by Eduard
Simon, in Berlin.
• From the resin of a tree, he distilled an oily
substance, a monomer that he named styrol.
• Days later, Simon found that the styrol had
thickened, presumably from oxidation, into a jelly he
dubbed styrol oxide.
• They called their substance metastyrol.
• But later the substance receiving its present name,
polystyrene.
5. Properties:
PS
Polystyrene
• Thermal properties: The "compact" polystyrene presents
the lowest thermal conductivity of all thermoplastics.
• Optical properties: While the PS shock is fully opaque,
the PS Crystal is transparent.
• Electrical properties: Polystyrene has very low electrical
conductivity, in other words, it is an insulator.
7. Recycling:
• In general, polystyrene is not accepted
in recycling programs, and is not separated and
recycled where it is accepted.
• In Germany, polystyrene is collected, as a
consequence of the packaging law that requires
manufacturers to take responsibility for
recycling or disposing of any packaging material
they sell.
8. Ampliation:
• Polystyrene foam is a major environmental
problem. Used in the packaging of products and
transportation industry, occurs in the world tons
of it each year. The fact that it is not recyclable
increases the ecological impact.
Contamination by polystyrene foam in landfills.
10. WHAT IS POLYURETHANE ?
• Polyurethane (PUR and PU) is a polymer
composed of a chain of organic units joined by
carbamate (urethane) links. While most
polyurethanes are thermosetting polymers that
do not melt when heated, thermoplastic
polyurethanes are also available.
11. HISTORY OF POLYURETHANE
• Polyurethanes can be found in liquid coatings and paints, tough
elastomers such as roller blade wheels, rigid insulation, soft flexible
foam, elastic fiber or as an integral skin. No matter how
polyurethane is transformed, the underlying chemistry is the result
of one man’s genius, Prof. Dr. Otto Bayer (1902-1982). Prof. Dr.
Otto Bayer is recognized as the “father” of the polyurethanes
industry for his invention of the basic diisocyanate polyaddition
process.
• The origin of polyurethane dates back to the beginning of World
War II, when it was first developed as a replacement for rubber. The
versatility of this new organic polymer and its ability to substitute
for scarce materials spurred numerous applications. During World
War II, polyurethane coatings were used for the impregnation of
paper and the manufacture of mustard gas resistant garments, highgloss airplane finishes and chemical and corrosion-resistant
coatings to protect metal, wood and masonry.
12. HOW POLYURETHANE IS MADE
• Polyurethane chemistry is complex, but the basics
are relatively easy to understand. Polyurethanes are
formed by reacting a polyol (an alcohol with more
than two reactive hydroxyl groups per molecule)
with a diisocyanate or a polymeric isocyanate in the
presence of suitable catalysts and additives. Because
a variety of diisocyanates and a wide range of
polyols can be used to produce polyurethane, a
broad spectrum of materials can be produced to
meet the needs for specific applications.
13. POLYURETHANE APPLICATIONS
• Heating and cooling costs amount to about 56 percent of the
energy used in the average American home, according to the
U.S. Department of Energy. The nature of the chemistry
allows polyurethanes to be adapted to solve challenging
problems, to be molded into unusual shapes and to enhance
industrial and consumer products.
• Polyurethanes are formed by reacting a polyol (an alcohol
with more than two reactive hydroxyl groups per molecule)
with a diisocyanate or a polymeric isocyanate in the presence
of suitable catalysts and additives. Because a variety of
diisocyanates and a wide range of polyols can be used to
produce polyurethane, a broad spectrum of materials can be
produced to meet the needs of specific applications.
14. PROPERTIES OF POLYURETHANE
• Continuous insulation with joints: eliminates thermal bridges.
• Waterproofing (high density).
• “Autoahderente “ , to any surface or material used in construction.
• Light weight: no “sobre caraga “structures.
• Indefinite Duration.
• Total sealing.
• Chemical resistance.
• Fire resistance.
15. POLYURETHANE FORMS
• Polyurethanes exist in a variety of forms,
including flexible foams, rigid foams, chemicalresistant coatings, specialty adhesives and
sealants, and elastomers.
• Rigid :
Flexible:
17. 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.
18. Characteristics
• Excellent electrical insulator.
• . Transparent, opaque or attractive colors.
• . Resistant to low temperatures.
• . Hygienic and safe.
• . Inert to chemical attack.
• . Excellent moisture barrier.
• . Economic.
19. 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
20. 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.