High norbornene incorporation in ethylene-norbornene copolymerization with a bis(α-alkyloxoimine) titanium-MAO catalyst

被引：12
作者：
Gao HaiYang [1 ,2 ]
Hu Hao [1 ]
Wu Qing [1 ,2 ]
机构：
[1] Sun Yat Sen Zhongshan Univ, Sch Chem & Chem Engn, Inst Polymer Sci, Guangzhou 510275, Guangdong, Peoples R China
[2] Minist Educ, Key Lab Polymer Composite & Funct Mat, Guangzhou 510275, Guangdong, Peoples R China
来源：
SCIENCE CHINA-CHEMISTRY | 2010年 / 53卷 / 08期
基金：
中国国家自然科学基金;
关键词：
catalyst; ethylene; norbornene; polymerization; copolymerization; HALF-SANDWICH CATALYSTS; ETHYLENE/NORBORNENE COPOLYMERIZATION; OLEFIN POLYMERIZATION; METHYLALUMINOXANE CATALYSTS; HOMOGENEOUS METALLOCENE; CYCLOOLEFIN COPOLYMERS; ALUMINOXANE CATALYSTS; VINYL-POLYMERIZATION; NICKEL-CATALYSTS; MOLECULAR-WEIGHT;
D O I：
10.1007/s11426-010-4021-0
中图分类号：
O6 [化学];
学科分类号：
0703 ;
摘要：
A novel bis(alpha-alkyloxoimine) titanium(IV) complex was synthesized and used as a catalyst precursor to catalyze homo- and copolymerization of ethylene and norbornene. The titanium complex activated with methylalumoxane exhibits good activities for the homopolymerizations of ethylene and norbornene under high temperature to produce high-molecular-weight linear polyethylene and vinyl-type polynorbornene, respectively. Ethylene-norbornene copolymers with high molecular weight can also be produced by this catalyst. The incorporation of norbornene from 0 to 76 mol% in the copolymers can be controlled by varying the charged norbornene. (13)C NMR analyses show that the microstructures of the ethylene-norbornene copolymers with low norbornene incorporation are predominantly alternated and isolated norbornene units, while those with high norbornene incorporation are random polymers containing long norbornene sequences.
引用
收藏
页码：1634 / 1640
页数：7
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