四氢呋喃在苯中聚合向醋酸酐链转移的研究

STUDY OF CHAIN TRANSFER TO ACETIC ANHYDRIDE IN THE POLYMERIZATION OF TETRAHYDROFURAN

本文研究了以苯为溶剂，在醋酸酐存在下，采用乙酸基四氟硼酸盐CH3COBF4为催化剂进行四氢呋喃（THF）聚合及链转移的反应．经测定，在15℃和21℃下的表观聚合速度常数Kp分别为7．03×10－3和10．18×10－3L／mol·s，表观链转移速度常数Ktr分别为7．39×10-4和12．01×10-4L／mol·s。

n the presence of acetic anhydride, benzene as solvent and CH3COBF4 as catalyst, thekinetic machanism of polymerization and chain transfer were discussed in details in this paper. The apparent rate constants of polymerization are 7. 03 × 10-3 and 10. 18 × 10-3L/mol· s,the apparent rate constants of chain transfer are 7. 39 × 10-4 and 12. 01 × 10-4 L/mol·s at 15 ℃ and 21℃ respectively.