Monday, 18 April 2016

Polymer Technology......

Monomer:
                    A monomer is a molecule that may bind chemically to other molecules to form a polymer.

Monomers are small molecules which may be joined together in a repeating fashion to form more complex molecules called polymers.

Exp: The most common natural monomer is glucose, which is linked by glycosidic bonds into polymers such as cellulose and starch.

Polymer:
                A polymer  is a large molecule, or macromolecule, composed of many repeated subunits, known as monomers.


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Classification of Polymers 

 Polymers are classified in different types on different basis. 

1. Classification based on source :- 
 On the basis of sources of polymers they are classified in three.

1. Classification based on source :
 On the basis of sources of polymers they are classified in three types. 
a) Natural polymers - 
 Polymers either obtained from plants or animal are called 
natural polymers. They are called plant and animal polymers. 
Ex. Cellulose, Jute, Linen, Silk, Wool, Leather, RNA, DNA, Natural rubber. 
b) Semi synthetic polymers - 
 The polymers obtained by simple chemical 
treatment of natural fibres to improve their physical properties like lustre nature, 
tensile strength are called semisynthatic fibres. 
 Ex. Acetate rayon, cuprammonium silk, viscous rayon. 
c) Synthetic fibres - 
 The fibres obtained by polymerisation of simple chemical 
molecules in laboratory are synthetic fibres. 
 Ex. Nylon, Terylene, polyethene, polystyrene, synthetic, rubber, nylon, pvc, 
becklite, teflon, orion et polymers - 
 Polymers either obtained from plants or animal are called 
natural polymers. They are called plant and animal polymers. 
Ex. Cellulose, Jute, Linen, Silk, Wool, Leather, RNA, DNA, Natural rubber. 

b) Semi synthetic polymers - 
 The polymers obtained by simple chemical 
treatment of natural fibres to improve their physical properties like lustre nature, 
tensile strength are called semisynthatic fibres. 
 Ex. Acetate rayon, cuprammonium silk, viscous rayon. 
c) Synthetic fibres - 
 The fibres obtained by polymerisation of simple chemical 
molecules in laboratory are synthetic fibres. 
 Ex. Nylon, Terylene, polyethene, polystyrene, synthetic, rubber, nylon, pvc, 
becklite, teflon, orion et

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