Introduction to Polymers - Classification of Polymers Based on Mode of Polymerisation

High density polyethylene (HDPE) can be prepared from ethylene by

A condensation polymer among the following polymers is:

Distinguish between the terms homopolymer and copolymer and give an example of each.

Write the names and structures of the monomers of the following polymers: Buna-S

Write the names and structures of the monomers of the following polymers: Dacron 

Write the name and structure of one of the common initiators used in free radical addition polymerisation.

Shyam went to a grocery shop to purchase some food items. The shopkeeper packed all the items in polythene bags and gave them to Shyam. But Shyam refused to accept the polythene bags and asked the shopkeeper to pack the items in paper bags. He informed the shopkeeper about the heavy penalty imposed by the government for using polythene bags. The shopkeeper promised that he would use paper bags in future in place of polythene bags.

1) Write the values (at least two) shown by Shyam.

2) Write one structural difference between low-density polyethene and high-density polyethene.

3) Why did Shyam refuse to accept the items in polythene bags?

4) What is a biodegradable polymer? Give an example.

Which of the following polymers are condensation polymers?

(i) Bakelite

(ii) Teflon

(iii) Butyl rubber

(iv) Melamine formaldehyde resin