The composition that would have the highest degree of crystallinity is 50% PLA, 50% poly(6-decalactone). The correct option is A.
Block copolymers are a long chain of alternate copolymers. By using a dual functional initiator that can polymerize two types of monomers by two different methods, or by applying a site transformation reaction from one polymerization technique to another, copolymers can be created.
An example of a copolymer is acrylonitrile butadiene styrene, commonly used as rubber SBS.
Therefore, the correct option is A, 50% PLA, 50% poly(6-decalactone).
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The question is incomplete. Your most probably complete question is given below:
O 50% PLA, 50% poly(6-decalactone)
O 45% PLA, 55% poly(8-decalactone)
O 25% PLA, 75% poly(8-decalactone)
O 10% PLA, 90% poly(ö-decalactone)
O 75% PLA, 25% poly(5-decalactone)