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

Define thermoplastics and thermosetting polymers with two examples of each.

Write the monomers used for getting the following polymers.

(i) Polyvinyl chloride (ii) Teflon (iii) Bakelite

How does the presence of double bonds in rubber molecules influence their structure and reactivity?

Discuss the main purpose of vulcanisation of rubber.