Q.9 Which of the following polymers, need at least one diverse monomer for their preparation?

(a) Dacron

(b) Buna-S

(c) Neoprene

(d) Novolac

(b,c) Buna-S and neoprene are two such polymers that need atleast one diene monomer for their preparation.

(b) Buna-S is prepared by copolymerization of 1, 3-butadiene, and styrene.

(c) Neoprene is prepared by polymerization of chloroprene