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。
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
出处
《化学工业与工程》
CAS
1993年第4期15-21,共7页
Chemical Industry and Engineering
关键词
聚四氢呋喃
醋酸酐
催化剂
tetrahydrofuran
polymerization
acetyl tetrafluoro borate
acetic anhydride
rate constant
