Polyisobutylene and isobutylene-isoprene copolymer (IB-IP copolymer) attracted a lot of attention in scientific research and industrial application in recent decades, because of their excellent thermal and oxidative stability, chemical resistance, biocompatibility, high hysteresis, and low permeability to gases.

The syndioselective copolymerization of styrene with five alkenyl functionalized styrenic monomers, with the use of a scandium catalyst, produced a new family of versatile syndiotactic polystyrene materials with pendant alkenyl groups.

Copolymerizations of isobutylene and two alkenyl functionalized α-MeSt derivatives respectively, catalyzed by [(C5Me4SiMe3)Sc(CH2SiMe3)2THF], at −35 °C produced high Mn random copolymers with pendant alkenyl groups.