| 丁二烯在氯化稀土-乙醇-烷基铝催化体系中的某些动力学规律 Ⅱ.链转移速度常数的测定及链终止反应机理的探讨 |
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| 引用本文： | 潘恩黎,邹昌玉,扈晶余. 丁二烯在氯化稀土-乙醇-烷基铝催化体系中的某些动力学规律 Ⅱ.链转移速度常数的测定及链终止反应机理的探讨[J]. 高分子学报, 1985, 0(3): 161-166 |
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| 作者姓名： | 潘恩黎 邹昌玉 扈晶余 |
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| 作者单位： | 中国科学院长春应用化学研究所(潘恩黎，邹昌玉)，中国科学院长春应用化学研究所(扈晶余) |
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| 摘 要： | 本文测定丁二烯在La、Nd、Sm、Gd、Dy、Ho和Y七种稀土氯化物与两种烷基铝分别所组成的催化剂之烷基铝链转移速度常数k_a,结果表明,不同稀土催化剂k_a的变化趋势与链增长速度常数相似。动力学方法证明钐催化剂失活按双基终止进行。本文对稀土催化剂失活机理作了初步探讨。
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| 收稿时间： | 1983-03-05 |
KINETIC STUDY ON THE POLYMERIZATION OF BUTADIENE WITH LnCl_3-C_2H_5OH-AlR_3 CATALYSTS Ⅱ.Determination of the Chain Transfer Rate Constants and the Mechanism of Deaetivation |
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| PAN En-li,ZHOU Chang-yu,HU Jing-yu. KINETIC STUDY ON THE POLYMERIZATION OF BUTADIENE WITH LnCl_3-C_2H_5OH-AlR_3 CATALYSTS Ⅱ.Determination of the Chain Transfer Rate Constants and the Mechanism of Deaetivation[J]. Acta Polymerica Sinica, 1985, 0(3): 161-166 |
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| Authors: | PAN En-li ZHOU Chang-yu HU Jing-yu |
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| Affiliation: | Changchun Institute of Applied Chemistry; Academia Sinica; Changchun |
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| Abstract: | The rate constants of chain transfer in the polymerization of butadiene with LnCl3-C2H5OH-AlR3 catalysts (Ln=La, Nd, Sm, Gd, Dy, Ho or Y; AlR3 =AT(C2H5)3 or Al(i-C4H9)3) Were evaluated. Analogous to the propagation rate constants described in the early paper these rate constants varies also with the rare earth element used in the catalysts and decreases in the same order. The kinetic study showed that the deactivation of active center initiated with Sm-catalyst was second order. Besides, the mechanism of deactivation of active center has been proposed for the present polyme-rization system. |
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