| 温度对乙烯在TiCl_4/MgCl_2-Al(i-Bu)_3上聚合动力学的影响 |
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| 引用本文： | 郑荣辉,蔡丽芬,尹先德.温度对乙烯在TiCl_4/MgCl_2-Al(i-Bu)_3上聚合动力学的影响[J].厦门大学学报(自然科学版),1987(3). |
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| 作者姓名： | 郑荣辉 蔡丽芬 尹先德 |
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| 作者单位： | 厦门大学化学系，厦门大学化学系，中科院物质结构研究所 物理化学研究所，物理化学研究所 |
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| 摘 要： | 研究了聚合温度(T)对乙烯在负载型TiCl_4/MgCl_2-Al(i-Bu)_3体系催化剂上聚合动力学的影响,在其他条件相对固定下,聚合速度(R)、活性中心浓度(C~*)和链增长速度常数(K_p)随温度升高而增大,而聚乙烯分子量(MW)则随温度升高而降低,求出体系的表观活化能(Ea)为29kJ/mol.根据测得的数据,讨论了温度在活性衰减、链转移反应和活性中心生成中的作用.
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Influence of Temperature on Kinetics of Ethylene Polymerization over Supported TiCl_4/MgCl_2 Al(i-Bu)_3 |
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| Zheng Ronghui Cai Lifen.Influence of Temperature on Kinetics of Ethylene Polymerization over Supported TiCl_4/MgCl_2 Al(i-Bu)_3[J].Journal of Xiamen University(Natural Science),1987(3). |
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| Authors: | Zheng Ronghui Cai Lifen |
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| Abstract: | The influence of temperature(T) on the kinetics of ethylene polymerization over supported catalyst-TiCl4/MgCl2-Al(i-Bu)3 was studied. With temperature rise, the polymerization rate(R), the active center concentration (C) and the propagation rate constant(Kp) increased but the molecular weight of polyethylene(M) decreased. A value of 27kJ/mol for the apparent activation energy of this system was obtained. Based on these data the effect of polymerization temperature on decay of catalyst activity, the chain transfer reaction and the formation of the active center were discussed. |
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| Keywords: | Ethylene Polymerisation Temperature Kinetic Supported catalyrt |
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