PREPARATION OF NARROW-MOLECULAR-WEIGHT-DISTRIBUTION POLY(TETRAHYDROFURAN)

被引：8

作者：

FUJIMOTO, T ^{[1
]}

KAWAHASHI, M ^{[1
]}

NAGASAWA, M ^{[1
]}

TAKAHASHI, A ^{[1
]}

机构：

[1] MIE PREFECTURAL UNIV,CHEM DEPT IND & RESOURCES,TSU,MIE 514,JAPAN

来源：

POLYMER JOURNAL | 1979年 / 11卷 / 03期

关键词：

Catalyst—promoter; Chain transfer; Impurity; Narrow molecular weight distribution; Poly(tetrahydrofuran); Trifluoroboron—thf—ethylene oxide;

D O I：

10.1295/polymj.11.193

中图分类号：

O63 [高分子化学（高聚物）];

学科分类号：

070305 ; 080501 ; 081704 ;

摘要：

The preparation method for the monodisperse crystallizable polymer, poly(tetrahydrofuran), was studied over a wide range of molecular weights. Bulk polymerization of tetrahydrofuran (THF) was carried out by introducing THF monomer into a completely reacted trifluoroboron—THF-ethylene oxide catalyst—promoter system, with vigorous stirring. This initiation technique had no induction period. Both molecular weights and conversion increased linearly with reaction time. The molecular weight distribution evaluated by the sedimentation method as well as light scattering and osmometry was very sharp and Mw/Mn was less than 1.01 even at the Mw=106 When the polymerization is stopped at a low conversion (8&and;#x0025;), which is far from the equilibrium, the in-chain transfer reaction is negligible. © 1979, The Society of Polymer Science, Japan. All rights reserved.

引用

页码：193 / 199

页数：7

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