Mesoporous Zeolite as a New Catalyst for Polymerization of Lactones

被引:0
|
作者
Keisuke Kageyama
Takashi Tatsumi
Takuzo Aida
机构
[1] The Universty of Tokyo,Department of Chemistry and Biotechnology, Graduate School of Engineering
[2] The Universty of Tokyo,Engineering Research Institute, Faculty of Engineering
来源
Polymer Journal | 1999年 / 31卷
关键词
Mesoporous Zeolite; Polymerization of Lactone; Living Polymerization; Heterogeneous Catalyst; Block Copolymer;
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中图分类号
学科分类号
摘要
Polymerization of lactones such as δ-valerolactone (VL) and ε-caprolactone (CL) with protic compounds proceeded in the presence of an aluminosilicate mesoporous zeolite Al-MCM-41 (pore diameter of 27 Å, surface area = 1,010 m2 g−1), to give polyesters with narrow molecular weight distribution. The polymerization is likely to proceed via the activated monomer mechanism by the cooperative function of Lewis acidic aluminum and Brønsted acidic silanol functionalities on the interior wall. With titanate-mounted MCM-41 (Ti-MCM-41), the polymerization of VL gave a polymer containing an extremely high molecular weight fraction.
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页码:1005 / 1008
页数:3
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