| 化学反应法MgCl_2载体高效钛催化剂的乙烯-丙烯共聚合 |
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| 引用本文： | 李三喜,庞德仁,黄葆同.化学反应法MgCl_2载体高效钛催化剂的乙烯-丙烯共聚合[J].石油化工,2001,30(4). |
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| 作者姓名： | 李三喜 庞德仁 黄葆同 |
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| 作者单位： | 1. 沈阳化工学院 材料科学与工程系,
2. 中国科学院长春应用化学研究所, |
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| 基金项目： | 中国石化集团公司科技开发基金，国家教委留学回国
人员科研基金资助项目 |
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| 摘 要： | 研制了化学反应法高效载体钛催化剂 ,主催化剂制备的加料顺序为MgCl2 、n -C4H9OH、i-Bu3Al、TiCl4,然后与i-Bu3Al组成高活性催化体系。用此催化剂进行乙丙共聚 ,常温常压下催化效率可达 190kg/g以上 ,聚合反应具有三个显著特征 :催化活性高 ,较钒体系提高 2 0倍以上 ;共聚反应催化效率大大高于乙烯、丙烯各自均聚的催化效率 ;丙烯在此催化体系下具有比其它催化体系更高的共聚活性。
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| 关 键 词： | 催化剂 乙丙共聚 化学反应法 聚合 |
Studies on the Copolymerization of Ethylene and Propylene with MgCl_2- Supported High-Yield Titanium Catalyst Made by Chemical Reaction Method |
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| LI San-xi,PANG De-ren,HUANG Bao-tong.Studies on the Copolymerization of Ethylene and Propylene with MgCl_2- Supported High-Yield Titanium Catalyst Made by Chemical Reaction Method[J].Petrochemical Technology,2001,30(4). |
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| Authors: | LI San-xi PANG De-ren HUANG Bao-tong |
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| Affiliation: | LI San xi 1,PANG De ren 2,HUANG Bao tong 2 |
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| Abstract: | MgCl2-supported titanium catalyst prepared by chemical reaction method with the components added in the sequence of MgCl2/n-BuOH/i-Bu3Al/TiCl4 and then activated by i-Bu3Al at normal pressure showed much higher activity in the copolymeriation of ethylene and propylene than in homopolymerization of either ethylene or propylene. The apparent r1 and r2 for ethylene and propylene copolymerization were determined to be 7.44 and 0.22, respectively for this catalyst, showing a very high relative activity of propylene as compared to cases reported before. A Tg of - 50 ℃ of this copolymer was representative of EP rubber. Studies by DSC, WAXD and DMA revealed that the copolymers were random EP copolymers with very low or little crystallinity. Explanations as to the higher activity of the catalyst and copolymer monomer sequence distribution are also disCussed |
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| Keywords: | Ziegler Natta catalyst ethylene propylene copolymerization chemical reaction method polymerization |
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