Good Monomers for Cationic Polymerization Good monomers for cationic polymerization H R+ R-C—( (good) H H growing chain styrene benzylic carbocation H H、 CH3 CH3 R+ C-C R一C一C+ (good) CH3 CH3 H growing chain isobutylene tertiary carbocation Chapter 26 9Chapter 26 9 Good Monomers for Cationic Polymerization