High Temperature High Pressure Tandem Polymerization of Ethylene for Synthesis of Ethylene-1-Hexene Copolymers from Single Reactor with SNS-Cr and CGC-Ti Catalysts
作者： Song Guo , Hong Fan , Zhiyang Bu , Bo-Geng Li , Shiping Zhu
关键词:
摘要: Ethylene-1-hexene copolymers are synthesized from ethylene using the tandem catalyst system of bis(2-dodecylsulfanyl-ethyl)amine-CrCl3 (SNS-Cr) and [(η5-C5Me4)SiMe2(tBuN)]TiCl2 (CGC-Ti), with MAO as co-catalyst. The polymerization is carried out in a high-temperature high-pressure solution process. SNS-Cr trimerizes generates 1-hexene high selectivity. CGC-Ti copolymerizes produces ethylene-1-hexene copolymers. A short period pre-trimerization effective increasing content copolymer producing chains uniform microstructure. products prepared by this at temperature pressure exhibit competitive mechanical properties commercial ethylene-1-octene copolymer.
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