| 乙烯与丙烯在负载型钛系催化剂上的共聚合行为 |
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| 引用本文： | 伍青,林尚安.乙烯与丙烯在负载型钛系催化剂上的共聚合行为[J].高等学校化学学报,1992,13(11):1479-1481. |
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| 作者姓名： | 伍青 林尚安 |
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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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| 摘 要： | 乙烯与α-烯烃配位共聚速率明显高于乙烯均聚速率~1～4],其原因可归结为化学促进作用或单体扩散的影响.本文通过考察乙烯-丙烯在负载型钛系催化剂上的共聚动力学行为、催化剂-聚合物颗粒形态及改变聚合中单体的组成,以期进一步了解乙丙共聚反应的特征. 1 实验部分 1.1 催化剂及聚合 载体催化剂由无水MgCl_2、TiCl_4和EB共研磨而成,使用前用
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| 关 键 词： | 钛系载体催化剂 乙烯-丙烯共聚合 聚合动力学 聚合物形态 |
| 收稿时间： | 1991-11-19 |
Behavior of Ethylene-Propylene Copolymerization over Supported Titanium Catalyst |
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| WU Qing,LIN Shang-An.Behavior of Ethylene-Propylene Copolymerization over Supported Titanium Catalyst[J].Chemical Research In Chinese Universities,1992,13(11):1479-1481. |
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| Authors: | WU Qing LIN Shang-An |
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| Institution: | Institute of Polymer Science, Zhongshan University, Guangzhou, 510275 |
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| Abstract: | The time dependence of ethylene-propylene copolymerization rate over TiCl4/MgCl2/ EB-AlEt3 catalyst was studied.An enhanced rate of ethylene polymerization after brief copolymerization with propylene,which is much faster in comparison with that of conventional ethylene polymerization,and decaying-type kinetics were shown.It was found that the copolymerization brings about a change of morphology of the catalyst-polymer particles to loose structure.This allows the monomers diffusing more easily and developing potential activity of the catalyst,resulting in higher polymerization rate and different kinetic behavior from the homopolymerization. |
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| Keywords: | Titanium catalyst Ethylene-propylene copolymerization Polymerization kinetics Polymer morphology |
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