Cationic addition polymerization requires specific initiators to generate the propagating carbocatio — Polymers Chemistry Question

💡 Solution & Explanation

Cationic polymerization is initiated by Lewis acids (like $AlCl_3, BF_3$) or strong protic acids. Often, a Lewis acid requires a trace amount of a proton donor (co-initiator) like water to generate the initiating proton. Benzoyl peroxide is a radical initiator, and $NaNH_2$ is an anionic initiator.