| 茂钛/MAO催化体系进行降冰片烯聚合的研究 |
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| 引用本文： | 吕英莹,伍青,卢泽俭.茂钛/MAO催化体系进行降冰片烯聚合的研究[J].高等学校化学学报,2001,22(1):160-162. |
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| 作者姓名： | 吕英莹 伍青 卢泽俭 |
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| 作者单位： | 中山大学高分子研究所, 广州 510275 |
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| 基金项目： | 国家自然科学基金!(批准号 :2 99740 39)资助 |
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| 摘 要： | 以降冰片烯为例的环状烯烃的聚合方式主要有两种 :( A) Vinyl-type polymerization;( B) Ring-Opening Polymerization 80年代中期以前 ,环烯烃聚合研究主要集中在开环易位聚合 (ROMP)反应 1] .Kaminsky2 ] 首次以En(Ind) 2 Zr Cl2 ]/MAO等为催化剂进行降冰片烯的聚合 ,获得了熔点极高 (高于其 40 0℃的分解温度 )的大分子量加成结构的聚合物 .研究结果表明 ,具有 C2 和 Cs对称性的茂锆催化体系能高活性地得到降冰片烯加成聚合物 3,4 ] ,但是这些由茂锆催化体系合成的降冰片烯聚合物不溶于有机溶剂 ,难以进行精确定量的结…
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| 关 键 词： | 茂金属催化剂 降冰片烯 加成聚合 |
| 文章编号： | 0251-0790(2001)01-0160-03 |
| 收稿时间： | 1999-09-10 |
Studies on Polymerization of Norbornene with Titanocene/MAO Catalyst System |
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| LU Ying-ying,WU Qing,LU Ze-jian.Studies on Polymerization of Norbornene with Titanocene/MAO Catalyst System[J].Chemical Research In Chinese Universities,2001,22(1):160-162. |
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| Authors: | LU Ying-ying WU Qing LU Ze-jian |
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| Institution: | Institute of Polymer Science, Zhongshan University, Guangzhou 510275, China |
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| Abstract: | Vinyl-type polymerization of norbornene has been carried out with half-titanocene/MAO catalysts.It was found that the Cp (cyclopentadienyl)-bearing titanocene catalysts afford the polynorbornene at much higher yield than the related Cp* (pentamethylcyclopentadienyl)-bearing one.On the other hand,substitution of－OR ligand for chlorine at the Cp-bearing compound causes remarkbaly increase in catalytic activity.The optimum temperature for the polymerization is 60℃.All the polynorbornenes obtained with CpTi(OCH2Ph)3/MAO catalyst are soluble in the organic solvents such as cyclohexane and monochlorobenzene.The FTIR and 13C NMR spectra indicate that the polynorbornene obtained is vinyl-type polymer and has low stereo-regularity. |
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| Keywords: | Metallocene catalyst Norbornene Vinyl-type polymerization |
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