Rubber is an elastic material that can be produced from natural or synthetic sources. Natural rubber comes from the latex sap of rubber trees, while synthetic rubber is produced from petroleum byproducts through chemical processes. There are advantages to both natural and synthetic rubbers, as natural rubber is more flexible while synthetic rubbers are less expensive and not vulnerable to supply issues. The document outlines the key properties, advantages, and disadvantages of both natural and synthetic rubbers.
Natural products are chemical compounds or substances produced naturally by living organisms. With the development of modern technology, more and more plant extracts have been found to be useful to medical practice. Natural products can be divided into two major classes, primary metabolites, which are required for an organism to survive, and secondary metabolites, which are not required for an organism to survive, but usually lend the organism some form of growth or survival advantage within its environment.
Chapter - 3, Synthetic Fibres and Plastics, Science, Class 8Shivam Parmar
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Chapter - 3, Synthetic Fibres and Plastics, Science, Class 8
FIBRES AND FABRICS
TYPES OF FIBRES
NATURAL FIBRES
SYNTHETIC FIBRES
RAYON
NYLON
POLYESTER
ACRYLIC
CHARACTERISTICS OF SYNTHETIC FIBRES
PLASTICS
TYPES OF PLASTICS
THERMOPLASTICS
THERMOSETTING PLASTICS
PROPERTIES OF PLASTICS
SOME USES OF PLASTICS
BIODEGRADABLE SUBSTANCES
NON - BIODEGRADABLE SUBSTANCES
PLASTICS AND THE ENVIRONMENT
PREVENTION OF PLASTICS
3 R PRINCIPLE
Every topic of this chapter is well written concisely and visuals will help you in understanding and imagining the practicality of all the topics.
By Shivam Parmar (Entrepreneur)
introduction about diffrent types of polymersParthSavani17
in this document diffrent types of natural polymer like coal, amber, cotton, rubber etc. introduction about the sepretly discussed about the which polymer
Chemistry of plastics, rubber and resinsrita martin
Plastics any synthetic or semi-synthetic organic material includes chains of carbon, oxygen, sulfur or nitrogen. Rubber elastic substance divided into two groups natural, synthetic rubber. Resin is a natural or synthetic hydrocarbon secreted many plants
Composite Materials: A composite material can be defined as a combination of two or more materials that results in better properties than those of the individual components used alone. The two constituents of a composite are a reinforcement and a matrix.
Matrix: The continuous phase is the matrix, made of polymer, metal, or ceramic.
Reinforcement: A strong, inert, woven and nonwoven fibrous material incorporated into the matrix to improve its mechanical and physical properties. For example, fibers, whiskers, particulate etc.
Natural products are chemical compounds or substances produced naturally by living organisms. With the development of modern technology, more and more plant extracts have been found to be useful to medical practice. Natural products can be divided into two major classes, primary metabolites, which are required for an organism to survive, and secondary metabolites, which are not required for an organism to survive, but usually lend the organism some form of growth or survival advantage within its environment.
Chapter - 3, Synthetic Fibres and Plastics, Science, Class 8Shivam Parmar
I have expertise in making educational and other PPTs. Email me for more PPTs at a very reasonable price that perfectly fits in your budget.
Email: parmarshivam105@gmail.com
Chapter - 3, Synthetic Fibres and Plastics, Science, Class 8
FIBRES AND FABRICS
TYPES OF FIBRES
NATURAL FIBRES
SYNTHETIC FIBRES
RAYON
NYLON
POLYESTER
ACRYLIC
CHARACTERISTICS OF SYNTHETIC FIBRES
PLASTICS
TYPES OF PLASTICS
THERMOPLASTICS
THERMOSETTING PLASTICS
PROPERTIES OF PLASTICS
SOME USES OF PLASTICS
BIODEGRADABLE SUBSTANCES
NON - BIODEGRADABLE SUBSTANCES
PLASTICS AND THE ENVIRONMENT
PREVENTION OF PLASTICS
3 R PRINCIPLE
Every topic of this chapter is well written concisely and visuals will help you in understanding and imagining the practicality of all the topics.
By Shivam Parmar (Entrepreneur)
introduction about diffrent types of polymersParthSavani17
in this document diffrent types of natural polymer like coal, amber, cotton, rubber etc. introduction about the sepretly discussed about the which polymer
Chemistry of plastics, rubber and resinsrita martin
Plastics any synthetic or semi-synthetic organic material includes chains of carbon, oxygen, sulfur or nitrogen. Rubber elastic substance divided into two groups natural, synthetic rubber. Resin is a natural or synthetic hydrocarbon secreted many plants
Composite Materials: A composite material can be defined as a combination of two or more materials that results in better properties than those of the individual components used alone. The two constituents of a composite are a reinforcement and a matrix.
Matrix: The continuous phase is the matrix, made of polymer, metal, or ceramic.
Reinforcement: A strong, inert, woven and nonwoven fibrous material incorporated into the matrix to improve its mechanical and physical properties. For example, fibers, whiskers, particulate etc.
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2. • A material that can be stretched and will retract rapidly and forcibly to
substantially its original dimensions upon release off the force.
RUBBER
• Rubber is an elastic material that can be produced naturally from various
plant sources or synthetically through a variety of chemical processes.
3. NATURAL RUBBER:
A yellowish, amorphous, elastic material obtained from the latex of various tropical
plants, especially the rubber tree.
TYPES OF RUBBER
Also known as India Rubber
made from milky colloid “LATEX SAP” produced by some plants.
Latex is natural polymer of isoprene.
Latex is the protective fluid contained in tissue beneath the bark of the
rubber tree.
A cut is made in bark of the tree and latex is allowed to exude into a
collecting vessel
over a period of hours.
Latex is processed then dried, sorted and smoked.
4. There were a number of reasons responsible for the
development of an alternative or substitute for natural
rubber. These included:
Volatile or rising prices.
Supply of raw materials.
Long transport distances.
Regional constraints related rubber plantations.
Increase in global demand for rubber.
SYNTHETIC RUBBER
A synthetic rubber is an artificial elastomer. They are polymers synthesized from petroleum
byproducts. About 32 million metric tons of rubbers are produced annually in the United States, and
of that amount two thirds are synthetic.
DEVELOPMENT OF SYNTHETIC RUBBER
Synthetic rubber is a white, crumbly, plastic mass which can be processed and vulcanized in
the same way as natural rubber.
Most are obtained by polymerization or polycondensation of unsaturated monomers
5. Highly amorphous
material.
High randomly orientated
structure.
High tensile strength.
Low intermolecular forces
allow flexibility.
Energy storing ability.
Water repellant.
Resistant to alkalies and
weak acids.
PROPERTIES
Light Weight.
Molding.
High stretch ability and
flexibility.
Resistant to water and other
chemicals.
Electrical Insulation.
Shock absorbing
characteristics
These are recyclable like
plastics.
They can be easily colored by
most types of dyes.
ADVANTAGE
Cold weather hardness.
Become sticky in damp
conditions. That’s why,
VULCANIZATION is required to
make it weather resistant and
more durable.
General inability to bear
greater load.
Heat Absorbency.
Infectious to skin.
Relatively high cost of raw
materials.
DISADVANTAGE
6. COMPONENTS OF ATYRE
• Inner liner
• Body ply
• Side walls
• Beads
TYRE MANUFACTURING PROCESSES
• Apex
• Belt package
• Tread
• Cushion gum