| Nd（OPr~i）_2Cl－AlEt_3均相二元催化剂异戊二烯聚合动力学 Ⅱ．动力学参数的测定 |
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| 引用本文： | 蔡小平,龚志,王佛松,朱行浩,李秀华.Nd（OPr~i）_2Cl－AlEt_3均相二元催化剂异戊二烯聚合动力学 Ⅱ．动力学参数的测定[J].高分子学报,1995(6). |
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| 作者姓名： | 蔡小平 龚志 王佛松 朱行浩 李秀华 |
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| 作者单位： | 中国科学院长春应用化学研究所，吉化公司研究 |
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| 摘 要： | 用动力学方法测定了本体系不同温度下（３０℃，４０℃，５０℃）的平均增长链寿命τ，活性增长链浓度［Ｃ＊］，催化剂效率ＥＬＣＵ和绝对增长速度常数ｋｐ等主要动力学参数；求算了本体系增长反应活化能Ｅｐ＝５７．４ｋＪｍｏｌ．研究结果表明：该体系催化活性低的主要原因是其绝对增长速度常数太低．
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| 关 键 词： | 动力学，聚异戊二烯，均相催化剂，动力学参数 |
KINETICS OF POLYMERIZATION OF ISOPRENE WITH Nd(OPr￣i)_2Cl-AlEt_3 SOLUBLE CATALYST SYSTEM Ⅱ. DETERMINATION OF KINETIC PARAMETERS |
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| CAI Xiaoping, GONG Zhi, WANG Fosong.KINETICS OF POLYMERIZATION OF ISOPRENE WITH Nd(OPr￣i)_2Cl-AlEt_3 SOLUBLE CATALYST SYSTEM Ⅱ. DETERMINATION OF KINETIC PARAMETERS[J].Acta Polymerica Sinica,1995(6). |
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| Authors: | CAI Xiaoping GONG Zhi WANG Fosong |
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| Abstract: | he main kinetic parameters such as the concentration of active propagating chain (C*]), the efficiency of catalyst (ELCU) and the rate constant of absolute propagahon (kp) as well as the average lifetime of growing chain (τ). have been determined at 30 ℃, 40 ℃ and 50 ℃. The propagation activation energy of isoprene polymerization has been found to be 57.4 kJ/mol in heptane. The experimental results showed that the catalytic activity for the polymerization of isoprene is dominated by the rate constant of absolute propagation in this system. |
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| Keywords: | Kinetics Kinetic parameters Homogeneous catalyst Polyisoprene |
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