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POLYMERIZATION OF ISOBUTYL VINYL ETHER CATALYSED BY DINUCLEAR HALF-TITANOCENES
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作者 Nguyen Thi Le Thanh Seok Kyun Noh +1 位作者 Won Seok Lyoo Dong-Ho Lee 《Chinese Journal of Polymer Science》 SCIE CAS CSCD 2008年第5期611-620,共10页
Polymerization of isobutyl vinyl ether(IBVE)has been studied with mononuclear half-titanocene,CpTiCl_3[1]and dinuclear half-titanocenes,[(C_5H_4)_2(CH_2)_n][(TiCl_3)_2][2(n=3),3(n=6)],and[(C_5H_4)_2(CH_2)_n[(TiCl_2OR_... Polymerization of isobutyl vinyl ether(IBVE)has been studied with mononuclear half-titanocene,CpTiCl_3[1]and dinuclear half-titanocenes,[(C_5H_4)_2(CH_2)_n][(TiCl_3)_2][2(n=3),3(n=6)],and[(C_5H_4)_2(CH_2)_n[(TiCl_2OR_2](R=2,6- diisopropylphenoxyl)[4(n=3),5(n=6)],in the presence of methyl aluminoxanes(MAO)as cocatalyst in methylene chloride.The influences of the length of polymethylene brigde and the substitution of aryloxy group at the metal center have been investigated at three polymerization temperature(... 展开更多
关键词 Dinuclear half-titanocene Poly(isobutyl vinyl ether) Vinyl ether polymerization by metallocene Stereoregularity control by metallocene.
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HALF-TITANOCENE CHLORIDES 2-(BENZIMIDAZOL-2-YL)QUINOLIN-8-OLATES: SYNTHESIS, CHARACTERIZATION AND ETHYLENE (CO-)POLYMERIZATION BEHAVIOR 被引量:2
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作者 Wen-juan Zhang Wei Huang +1 位作者 Tong-ling Liang 孙文华 《Chinese Journal of Polymer Science》 SCIE CAS CSCD 2013年第4期601-609,共9页
A series of half-titanocene chloride 2-(benzimidazol-2-yl)quinolin-8-olates C1-C6 were synthesized by treating the lithium salts of the ligand with CpTiCI3. All the complexes were characterized by 1H-NMR, 13C-NMR an... A series of half-titanocene chloride 2-(benzimidazol-2-yl)quinolin-8-olates C1-C6 were synthesized by treating the lithium salts of the ligand with CpTiCI3. All the complexes were characterized by 1H-NMR, 13C-NMR and elemental analyses, and the crystal structure of C3 and C6 was measured by X-ray. These half-titanocene complexes showed moderate catalytic activities toward ethylene polymerization (up to 1840 kg·mol-1(Ti)·h-1) when activated with MMAO, affording the high molecular weight polymers. And they also exhibited good activity for copolymerization of ethylene and a-olefin with low content of co-monomer. 展开更多
关键词 half-titanocene 2-(Benzimidazol-2-yl)quinolin-8-ol Ethylene polymerization Co-polymerization.
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Living Polymerization of 1,3-Butadiene Catalyzed by Half-titanocene Complex Bearing Dibenzhydryl-substituted Aryloxide Ligand 被引量:1
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作者 Bo Dong Rui Zhuang +5 位作者 Chun-yu Zhang Wen-jie Zheng He-xin Zhang Yan-ming Hu 孙广平 张学全 《Chinese Journal of Polymer Science》 SCIE CAS CSCD 2017年第6期721-727,共7页
Half-titanocene complexes bearing dibenzhydryl-substituted aryloxide ligands (2a-2d) were prepared. Among them, 2e adopted a three-legged distorted tetrahedral geometry evidenced by X-ray crystallography. The poly-1... Half-titanocene complexes bearing dibenzhydryl-substituted aryloxide ligands (2a-2d) were prepared. Among them, 2e adopted a three-legged distorted tetrahedral geometry evidenced by X-ray crystallography. The poly-1,3-butadiene with high molecular weight and narrow molecular weight distribution was obtained by using these complexes as the catalysts activated with methylaluminoxane (MAO). The catalytic activities of the complexes depended on their structures. The Ti-- O--C bond in the complexes with large angle afforded them with higher activity, while Cp*-based complexes exhibited lower activities than the Cp-based analogues. The activity of complex increased with increasing the polymerization temperature while the selectivity remained no change, indicating the high thermal stability. Furthermore, the polymerization of 1,3-butadiene catalyzed by 2a/MAO at 0 ℃ has been found in a living fashion. 展开更多
关键词 half-titanocene complexes 1 3-BUTADIENE Thermal stability Living polymerization
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