引用本文:
张启兴, 范新刚, 胡明鹏, 王海华. 用双过渡金属复合催化剂制备长链支化聚乙烯[J]. 应用化学,
2003, 20(9): 888-892.
Citation: ZHANG Qi-Xing, FAN Xin-Gang, HU Ming-Peng, WANG Hai-Hua. Preparation of Long-Branching Chain Polyethylene Using Double Transition Metal TiCl4-Co(acac)2 Combined Catalyst[J]. Chinese Journal of Applied Chemistry, 2003, 20(9): 888-892.
Citation: ZHANG Qi-Xing, FAN Xin-Gang, HU Ming-Peng, WANG Hai-Hua. Preparation of Long-Branching Chain Polyethylene Using Double Transition Metal TiCl4-Co(acac)2 Combined Catalyst[J]. Chinese Journal of Applied Chemistry, 2003, 20(9): 888-892.
用双过渡金属复合催化剂制备长链支化聚乙烯
English
Preparation of Long-Branching Chain Polyethylene Using Double Transition Metal TiCl4-Co(acac)2 Combined Catalyst
Abstract:
The novel catalysts of TiCl4-acac-Co(acac)2, TiCl4-Co(acac)2 and TiCl4-acac supported on SiO2-MgCl2 carrier(Ti-Co combined catalyst) were prepared. They catalyze polymerimerization of ethylene giving branched polyethylene when Et2AlCl was used as a cocatalyst. The polymerization products have low melting point, low crystallinity and high degree of branching as evaluated by FTIR, DSC and 13C NMR spectrum. The results of 13C NMR suggested more than 55.0% of the polyethylene contain long branch chain(n≥6). Experimental results showed that the Ti-Co combined catalyst exhibites an excellent catalytic property for oligomerization and in situ copolymerization of ethylene.
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