Highly efficient synthesis of random isobutylene/alkenyl styrene copolymers with pendant vinyl groups via cationic polymerization for versatile functionalization

The controlled cationic copolymerizations of isobutylene (IB) with alkenyl styrenes including 4-allylstyrene, p -(3-butenyl)-styrene and p -(5-hexenyl)-styrene were carried out in n -hexane/CH 2 Cl 2 (6/4 v/v) at −80 °C using a t -BuCl/FeCl 3 /iPrOH initiating system.