Question

Classification of Polymers

Answer 1

Answer:

Explanation:Classification Of Polymers

Since Polymers are numerous in number with different behaviours and can be naturally found or synthetically created, they can be classified in various ways. The following below are some basic ways in which we classify polymers:

1] Classification Based on Source

The first classification of polymers is based on their source of origin, Let’s take a look.

(i) Natural polymers

The easiest way to classify polymers is their source of origin. Natural polymers are polymers which occur in nature and are existing in natural sources like plants and animals. Some common examples are Proteins (which are found in humans and animals alike), Cellulose and Starch (which are found in plants) or Rubber (which we harvest from the latex of a tropical plant ).

(ii) Synthetic polymers

Synthetic polymers are polymers which humans can artificially create/synthesize in a lab. These are commercially produced by industries for human necessities. Some commonly produced polymers which we use day to day are Polyethylene (a mass-produced plastic which we use in packaging) or Nylon Fibers (commonly used in our clothes, fishing nets etc.)

(iii) Semi-Synthetic polymers

Semi-Synthetic polymers are polymers obtained by making modification in natural polymers artificially in a lab. These polymers formed by chemical reaction (in a controlled environment) and are of commercial importance. Example: Vulcanized Rubber ( Sulphur is used in cross bonding the polymer chains found in natural rubber) Cellulose acetate (rayon) etc.

Answer 2

Answer:

hi, here's your answer

Polymers can be classified:

1. On the basis of structure
2. On the basis of nature of repeating structural units
3. On the basis of synthesis

Explanation:

1. On the basis of structure: On the basis, polymers are of three types as:

        (a) Linear polymers: These are polymers in which the monomeric units are joined together to form long straight chain like structure. These polymers generally have high densities and high melting points because polymeric chains are stacked one over the other and a well packed structure is obtained.

Eg: Nylon, Polyester, Polyvinyl Chloride, (PVC) etc.

         (b) Branched chain polymers: These are polymers in which monomeric units are linked to produce long chains with different lengths. There are side chains of different lengths which constitute branches. These polymeric have comparatively low densities and low melting points due to irregular packing

Eg: Glycogen, Starch etc.

         (c) Cross-linked polymers or Network polymers: Polymers inw hich the monomeric units are linked to each other to form a three dimensional network like structure. The monomeric units are linked by cross links. These polymers are hard, rigid and brittle in anture due to their network structure.

Eg: Bakelite, Melamine, etc.

    2. On the basis of nature of repeating structural units: On the basis, polymers can be classified into two categories as : (a)  Homopolymers       (b) Heteropolymers.

    3. On the basis of synthesis: On the basis of synthesis, polymers are of two types : (a) Addition polymers  (b) Condensation polymers.