四氢呋喃聚合中活性中心向醋酸酐链转移的研究

摘要本文介绍在有醋酸酐存在时采用乙酰基四氟硼酸盐CH_3COBF_4为催化剂进行四氢呋喃(THF)聚合反应;讨论了THF聚合及链转移的反应机理,发现醋酸酐对聚合速度有明显的影响。计算出0℃,6℃和15℃时的表观聚合反应速度常数K_p 分别为3.59,5.11和11.53×10~(-3)/mol·s;表观链转移速度常数K_(tr)分别为2.03,3.95和8.23×10~(-3)/mol·s;表观聚合反应活化能E_p 和链转移反应活化能E_(tr)分别为51.2和61.3 kJ/mol。

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	栗方星
	李春刚
	刘利平
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	李春刚
	刘利平

关键词：聚四氢呋喃乙酰基四氟硼酸盐醋酸酐速度常数聚四氢呋喃乙酰基四氟硼酸盐醋酸酐速度常数

Abstract： In this paper,the polymerization of tetrahydrofuran with (CH_3COBF_4as catalyst in the presence of acetic anhydride and the kinetic machanismof polymerization and chian transfer were discussed in detail.It has beenfound that acetic anhydride has a great influence on the polymerizationrate constants The apparent rate constants of polymerization are 3.59,5.11 and 11.53×10~(-3)L/mol·s;the apparent rate constants of chain tran-sfer are 2.03,3.59 and 8.23×10~(-3)L/mol·s respectively

Keywords： tetrahydrofuran;;polymerization;;acetyl tetrafluoro borate;;acetic anhydride;;rate constant

Received 1993-10-15; published 1993-10-15

引用本文:

栗方星,李春刚,刘利平.四氢呋喃聚合中活性中心向醋酸酐链转移的研究[J]. 化学工业与工程, 1993,10(4): 15-21

Li Fangxing Li Chungang Liu Liping .A Study of Chain Transfer to Acetic Anhydride in the Polymerization of Tetrahydrofuran[J]. Chemcial Industry and Engineering, 1993,10(4): 15-21