Question

The addition polymer which is/are co-polymer are:

(i) Neoprene
(ii) Buna-N
(iii) Nylon-$66$
(iv) SBR

• A. (iv)
• B. (ii) & (iv)
• C. (iii) & (iv)
• D. (i), (iii) & (iv)
• E. None of the above

Answer 1

The correct option is B (ii) & (iv)

The addition polymer which is/are co-polymer are Buna-N and SBR.

(ii) Buna-N is a copolymer of acrylonitrile and $1,3$ - butadiene.

(iv) SBR (Buna-S or styrene butadiene rubber) It is a copolymer of styrene and $1,3$ - butadiene.

However, the following are not addition copolymers.

(i) Neoprene is homopolymer of $2$ - chlorobuta-$1,3$ - diene.

(iii) Nylon - $6,6$ is a condensation copolymer. The monomers are hexamethylene diamine and adipic acid.