Advance materialsPolymers
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What are polymers and its applications?

About polymers: Polymers are materials made of long flexible chains and repeating chains of molecules. these long molecules are composed of structural entities called “mer” units, which are repeated in a chain. the polymer is made of many mers. The materials have unique properties, depending on the type of molecules being bonded and how they are bonded. Some polymers bend and stretch, like rubber and polyester. …

Polymers touch almost every aspect of modern life. Polymeric materials that are used for fibers in textiles (i.e., clothing) must be relatively strong. In this chapter we discuss the mechanical characteristics of polymers, the mechanisms (on a molecular scale) by which semicrystalline polymers plastically deform, and, finally, techniques that are available to strengthen these materials.

CLASSIFICATION OF POLYMERS:

  • Plastic and resins: Thermoplastics and thermosetting
  •  Rubber or elastomers
  • Fibers

 PLASTICS: Plastics are materials that are composed principally of naturally occurring and modified or artificially made polymers often containing additives such as fibers, fillers, pigments, and the like that further enhance their properties. Plastics include thermoplastics, thermosets. Plastics are used in an amazing number of applications including clothing, toys, home appliances, structural and decorative items, coatings, paints, adhesives, automobile tires, biomedical materials, car bumpers and interiors, foams, and packaging.

Thermoplastic: thermoplastic materials are those which soft and on the application of heat with or without pressure but then require cooling set them to shape. they can be heated and cool number of time only they should not be heated above their decomposition temperatures. they are highly plastic and are easy for moulding for shipping.  This family of polymers includes well established materials such as polyethylene (PE), polypropylene(PP), thermoplastic elastomers (TPE) and PVC.

Thermosetting: Thermosetting material are those plastics which require heat and pressure to mould them into shape. they cannot be reach of them once they have set and hardened. they are ideal for molding into components which require rigidity, strength and some resistance to heat.

 In general region formed by condensation are thermosetting. thermosetting having three dimensional molecular structure and have very high molecular weight. Some important commercial examples are: phenolics, polyesters, epoxies, silicones etc.

RUBBER: Elastomers commonly known as rubber is a linear polymer which process elastically and good resistance to corrosive fluids. The properties of depend upon the types of finishes and adhesives used. Commercially, the most important synthetic rubbers are styrene butadiene (SBR), polyacrylics, and polyvinyl acetate (PVA); other kinds include polyvinyl chloride (PVC), polychloroprene (better known as neoprene), and various types of polyurethane. Although natural rubber and synthetic rubbers are similar in some ways, they’re made by entirely different processes and chemically quite different. FIBERS: The fibre is a filament for thread like piece of any material. this term something also refer to raw material that can be drawn into thread. Animal fibres are to type animal hair obtained from sheep goat fix etc Silk produced by Mulberry Silkworm or from the larvae of other mouth. vegetable fibres consists mainly of cellulose. they may be seat here such as cotton, or the inner bask of plants, such as flax, hemp jute.

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K Yashdeep

Hye there..! I am Yashdeep Kamal. I completed my Bachelor in Technology(Materials Science and Metallurgical Engineering). Engineer by passion, writer by choice. I have been writing about Composites, Ceramics, polymers, nanotechnology, advance materials and metallurgy etc. You can read about these topics here. Hope it may help you.

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