What is orlon? Give its method of preparation. Give one of its uses.

Briefly describe the following terms giving one example of each:
(i) Polyolefins   
(ii) Polyamides
(iii) Polyesters    
(iv) Polydienes

Write the equations for the synthesis of:
PVC, Also give one important use of it.

Write the equations for the synthesis of:
Polymethyl methacrylate
Also give one important use of it.

Write the equations for the synthesis of:
Teflon, Also give one important use of it ?

Comment on:
(a)    PVC is a hard plastic but polyethylene is soft  wax-like.

(b)    Addition of sulphur to nutural rubber improves its properties.

(c)    Polypropylene is preferred ever polyethylene.

What are polyamides? How is nylon-66 synthesised? Give its uses.

Write the equations for the synthesis of:
Glyptal.
Also give one important use of it.

Write the equations for the synthesis of:
Polyacrylonitrile
Also give one important use of it.

Could a copolymer be formed in both addition and condensation polymerization or not? Explain with examples.