| 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Ⅰ.链增长速度常数的变化规律 |
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| 引用本文： | 潘恩黎,扈晶余,邹昌玉.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Ⅰ.链增长速度常数的变化规律[J].高分子学报,1985,0(2):125-130. |
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| 作者姓名： | 潘恩黎 扈晶余 邹昌玉 |
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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，扈晶余)，中国科学院长春应用化学研究所(邹昌玉) |
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| 摘 要： | 本文测出丁二烯在La、Nd、Sm、Gd、Dy、Ho和Y七种稀土氯化物与两种烷基铝分别组成的催化体系中聚合链增长速度常数和活性中心浓度。其30℃时k_p值在6—100 1/mol·sec间,不同稀土催化剂k_p值顺序为:k_p(Nd)～k_p(Sm)～k_p(Gd)>k_p(La)>k_p(Dy)>k_p(Ho)>k_p(Y)。钕催化剂在七种稀土催化剂中具有较大的活性中心浓度,其值为2—3×10~(-2)mol/molNd。本文对稀土络合催化剂k_p的性质作了讨论。
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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 Ⅰ. Determination of the Propagation Rate Constants |
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| PAN En-li,HU Jing-yu,ZHOU Chang-yu.KINETIC STUDY ON THE POLYMERIZATION OF BUTADIENE WITH LnCl_3-C_2H_5OH-AlR_3 CATALYSTS Ⅰ. Determination of the Propagation Rate Constants[J].Acta Polymerica Sinica,1985,0(2):125-130. |
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| Authors: | PAN En-li HU Jing-yu ZHOU Chang-yu |
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| Institution: | Institute of Applied Chemistry; Academia Sinica; Changchun |
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| Abstract: | The propagation rate constants and active center concentration were evaluated for the polymerization of butadiene with LnCl3-C2H5OH-AlR3 catalysts(Ln=La,Nd,Sm,Gd,Dy,Ho or Y; AlR3=Al (C2H5)3 or Al(i-C4H9)3. Both the propagation rate constant and active center concentration varied with the rare earth element used in the catalyst. The former lies in the range of 6-100 l/mol · sec at 30℃ and decreases in the order of: kp(Nd)-Kp (Sm)-Kp(Gd) > Kp (La) > Kp (Dy) > Kp (Ho) > Kp(Y). The active center concentration formed by Nd -catalyst has an order of 2-3 × 10-2mol/mol Nd which is much higher than any other six rare earth catalysts. The nature of propagation rate constant was discussed. |
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