Question

which of the following schematics is consistent with a polymer architecture featuring pe grafted onto a ptfe - pvc block - copolymer primary chain? each circle is considered to be a repeat unit.

Explanation:

A block - copolymer has distinct blocks of different monomers in the main chain. PTFE and PVC are different monomers forming the block - copolymer primary chain. PE is grafted onto this primary chain as side - chains. We need to look for a structure where there is a main chain with two distinct block regions (representing PTFE and PVC) and side - chains (representing PE).

Answer:

A. The structure in option (a) shows a main chain with two distinct block - like regions (different colored circles in sequence) and side - chains attached to the main chain, which is consistent with a PTFE - PVC block - copolymer primary chain with PE grafted onto it.