KINETICS OF POLYMERIZATION OF ISOPRENE WITH Nd(Opri)2Cl-AlEt3 SOLUBLE CATALYST SYSTEM Ⅱ. DETERMINATION OF KINETIC PARAMETERS

CAI Xiao-ping; GONG Zhi; WANG Fo-song; Zhu Xing-hao; LI Xin-hua

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KINETICS OF POLYMERIZATION OF ISOPRENE WITH Nd(Opri)2Cl-AlEt3 SOLUBLE CATALYST SYSTEM Ⅱ. DETERMINATION OF KINETIC PARAMETERS

Research Article | 更新时间：2021-03-19

- KINETICS OF POLYMERIZATION OF ISOPRENE WITH Nd(Opri)2Cl-AlEt3 SOLUBLE CATALYST SYSTEM Ⅱ. DETERMINATION OF KINETIC PARAMETERS
- Acta Polymerica Sinica Issue 6, Pages: 653-657(1995)
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- Published：20 December 1995，
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CAI Xiao-ping, GONG Zhi, WANG Fo-song, Zhu Xing-hao, LI Xin-hua. KINETICS OF POLYMERIZATION OF ISOPRENE WITH Nd(Opri)2Cl-AlEt3 SOLUBLE CATALYST SYSTEM Ⅱ. DETERMINATION OF KINETIC PARAMETERS. [J]. Acta Polymerica Sinica (6):653-657(1995)
DOI：

CAI Xiao-ping, GONG Zhi, WANG Fo-song, Zhu Xing-hao, LI Xin-hua. KINETICS OF POLYMERIZATION OF ISOPRENE WITH Nd(Opri)2Cl-AlEt3 SOLUBLE CATALYST SYSTEM Ⅱ. DETERMINATION OF KINETIC PARAMETERS. [J]. Acta Polymerica Sinica (6):653-657(1995) DOI：

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．

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.

关键词

动力学聚异戊二烯均相催化剂动力学参数

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