RING-OPENING POLYMERIZATION OF TRIMETHYLENE CARBONATE BY CALIX[8]ARENE-NEODYMIUM*

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RING-OPENING POLYMERIZATION OF TRIMETHYLENE CARBONATE BY CALIX[8]ARENE-NEODYMIUM*

Papers | Updated：2021-06-21

- RING-OPENING POLYMERIZATION OF TRIMETHYLENE CARBONATE BY CALIX[8]ARENE-NEODYMIUM*
- Vol. 18, Issue 1, Pages: 77-80(2000)
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- Published：20 February 2000
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RING-OPENING POLYMERIZATION OF TRIMETHYLENE CARBONATE BY CALIX[8]ARENE-NEODYMIUM*[J]. 2000, 18(1): 77-80.
DOI：

RING-OPENING POLYMERIZATION OF TRIMETHYLENE CARBONATE BY CALIX[8]ARENE-NEODYMIUM*[J]. 2000, 18(1): 77-80. DOI：

摘要

Ring-opening polymerization of trimethylene carbonate (TMC) with a rare earth calixarene compound as catalysthas been studied for the first time. The effect of TMC/Nd (molar ratio) and polymerization conditions were investigated indetail. It was found that calix[8]arene-neodymium is a highly effective catalyst for the bulk polymerization of TMC and giveshigh molecular weight (Mv = 60

000) polymer. The optimum conditions of TMC polymerization were found to be as follows:TMC/Nd(molar ratio)=2

000

80℃

16h.The polymers were characterized by NMR

GPC and DSC.Studying the mechanism by NMR showed that the polymerization of TMC catalyzed by calix[8]arene-neodymium proceeds via a cationic mechanism.

Abstract

000) polymer. The optimum conditions of TMC polymerization were found to be as follows:TMC/Nd(molar ratio)=2

000

80℃

16h.The polymers were characterized by NMR

GPC and DSC.Studying the mechanism by NMR showed that the polymerization of TMC catalyzed by calix[8]arene-neodymium proceeds via a cationic mechanism.

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