Classification Of Polymers, Cellulose, Starch, And Rubber

841 Words Mar 27th, 2016 4 Pages
 Polymers they are combined form small units of compound having low molecular weight, as a wall is made up of bricks.
 The word ‘polymer’ is taken from two Greek words poly states many and (mer) means unit or part.
 The term polymer is defined as very large molecules having high molecular mass. These are also referred to as macromolecules, which are formed by joining of repeating structural units on a large scale.
 The repeating structural units are derived from some simple and reactive molecules known as monomers and are linked to each other by covalent bonds.
 This process of formation of polymers from respective monomers is called polymerization.

(2)Types of Polymers
There are several ways of classification of polymers based on some special considerations. The following are some of the common classifications of polymers:
Under this type of classification, there are three sub categories.
 (2,1,1)-Natural polymers these polymers are found in plants and animals. Examples are proteins, cellulose, starch, and rubber.
 (2,1,2)- Semi-synthetic polymers Cellulose derivatives as cellulose acetate (rayon) and cellulose nitrate, etc. are the usual examples of this sub category.
 (2,1,3)- Synthetic polymers A variety of synthetic polymers as plastic (polythene), synthetic fibers (nylon 6,6) and synthetic rubbers (Buna - S) are examples of manmade polymers extensively used in daily life as well as in industry.
There are three different types based on the…
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