Complex sentence: However, it is susceptible to polymer degradation catalyzed by acids, which is why it is stabilized-both the homopolymer and the copolymer have chain end groups (introduced via end capping) that resist depolymerization.
Split into simpler sentences: However, it is susceptible to polymer degradation catalyzed by acids, which is why both polymer types are stabilized. Both homopolymer and copolymer have chain end groups (introduced via end capping) which resist depolymerization.