Discussion
A copolymer differs from a homopolymer in containing
Answer: A
Correct answer: two or more kinds of repeat unit
A copolymer is made from more than one monomer, and the arrangement gives further variety: random, alternating, block or graft. It is the principal means of tailoring properties - SBR combines the toughness of styrene with the elasticity of butadiene, and ABS the rigidity of styrene-acrylonitrile with the impact resistance of a rubber phase.
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