Alkenylsilane Effects on Organotitanium-Catalyzed Ethylene Polymerization.Toward Simultaneous Polyolefin Branch and Functional Group Introduction

摘要

Polyolefins containing longer-chain branches or reactive functionality have a myriad of desirable properties,such as increased melt-fracture resistance,adhesion,elasticity,and compatibility with other materials.Despite recent advances in homogeneous olefin polymerization,precise tailoring of such polymer microstructures remains largely unrealized.A potential approach to simultaneously control branching and reactive functionality would be by manipulating specific polymerization chain transfer pathways.However,to date,introduction of a comonomer having the ability both to undergo rapid insertion (propagation) as well as to effect chain transfer to introduce reactive functionality has not to our knowledge been explored.