Lanthanide thiolate complexes:: Novel initiators for ring-opening polymerization of ε-caprolactone

被引：12

作者：

Sun, HM ^{[1
]}

Li, HR ^{[1
]}

Yao, CS ^{[1
]}

Yao, YM ^{[1
]}

Sheng, HT ^{[1
]}

Shen, Q ^{[1
]}

机构：

[1] Suzhou Univ, Key Lab Organ Synth Jiangsu Prov, Coll Chem & Chem Engn, Suzhou 215006, Peoples R China

来源：

CHINESE JOURNAL OF CHEMISTRY | 2005年 / 23卷 / 11期

关键词：

ring-opening polymerization; samarium thiolate complex; catalysis; epsilon-caprolactone;

D O I：

10.1002/cjoc.200591541

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

The ring-opening polymerization (ROP) of epsilon-caprolactone (epsilon-CL) using lanthanide thiolate complexes [(CH3C5H4)(2)Sm(mu-SPh)(THF)](2) (1) and Sm(SPh)(3)(HMPA)(3) (2) as initiators has been investigated for the first time. Both of 1 and 2 were found to be highly efficient initiators for the ROP of epsilon-CL. The poly(epsilon-caprolactone) (PCL) with molecular weight M-n up to 1.97 X 10(5) and relatively narrow molecular weight distributions (1.20 < M-w/M-n < 2.00) have been obtained in high yield in the temperature range of 35-65 degrees C. According to the polymer yield, 2 showed much higher activity than 1. However, the number-average molecular weight of PCL obtained with 2 was much lower than with 1. The possible polymerization mechanism of the epsilon-CL polymerization has been proposed based on the results of the end group analysis of the epsilon-CL oligomer.

引用

页码：1541 / 1544

页数：4

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