Which of the following is an example of a co-polymer?
Polyethene
Buna-S
PAN
PTFE
Buna-S is a co-polymer of butadiene and styrene.
Which of the following are example of synthetic rubber?
(a) Polychloroprene
(b) Polyacrylonitrile
(c) Buna-N
(d) cis-polyisoprene