Question

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

Explanation:

In a polymer architecture with PE (polyethylene) grafted onto a PP (polypropylene) primary chain, the PP forms the main - chain and PE forms the side - chains. The main - chain should be continuous with side - chains branching off. Assuming one color represents PP repeat units and another represents PE repeat units, we look for a structure where one type of chain (PP) is the main backbone and the other (PE) is attached as branches.

Answer:

(d)