Ethylene-Propylene Copolymerization Behavior of ansa-Dimethylsilylene(fluorenyl)(amido)dimethyltitanium Complex: Application to Ethylene-Propylene-Diene or Ethylene-Propylene-Norbornene Terpolymers

摘要

Copolymerization behavior of ethylene (E) and propylene (P) using ansa-dimethylsilylene(fluorenyl)(amido)dimethyltitanium complex was investigated. P was more reactive than E regardless of the chain-end monomer unit, which was very unusual in the coordination polymerization system. The terpolymerizations of E, P and norbornene (NB) or 5-ethylidene-2-norbornene (5E2N) were also performed. The each content in the E/P/NB terpolymer was independently controlled by the initial concentration of NB and E/P feed ratio. Glass transition temperature (T-g) of the terpolymer was raised in proportion to the NB content and close to that of the corresponding NB/E random copolymer with the same NB content. (c) 2014 Wiley Periodicals, Inc. J. Polym. Sci., Part A: Polym. Chem. 2015, 53, 685-691