THTRAHYDROFURAN POLYMERIZATION INITIATED WITH HETEROPOLYACID Ⅱ.REACTION BEHAVIOR OF WATER

ZHANG Afang; ZHANG Guangli; ZHANG Hongzhi

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THTRAHYDROFURAN POLYMERIZATION INITIATED WITH HETEROPOLYACID Ⅱ.REACTION BEHAVIOR OF WATER

Research Bulletin | 更新时间：2021-03-19

- THTRAHYDROFURAN POLYMERIZATION INITIATED WITH HETEROPOLYACID Ⅱ.REACTION BEHAVIOR OF WATER
- Acta Polymerica Sinica Issue 2, Pages: 244-247(1999)
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- Published：20 April 1999，
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ZHANG Afang, ZHANG Guangli, ZHANG Hongzhi. THTRAHYDROFURAN POLYMERIZATION INITIATED WITH HETEROPOLYACID Ⅱ.REACTION BEHAVIOR OF WATER. [J]. Acta Polymerica Sinica (2):244-247(1999)
DOI：

ZHANG Afang, ZHANG Guangli, ZHANG Hongzhi. THTRAHYDROFURAN POLYMERIZATION INITIATED WITH HETEROPOLYACID Ⅱ.REACTION BEHAVIOR OF WATER. [J]. Acta Polymerica Sinica (2):244-247(1999) DOI：

摘要

前报我们对低腐蚀性非均相的磷钨杂多酸Ｈ３ＰＷ１２Ｏ４０（ＰＷ１２）引发体系进行了研究［１］

发现环氧乙烷（ＥＯ）可有效地促进ＰＷ１２引发的四氢呋喃（ＴＨＦ）聚合反应

大幅度地降低了引发剂用量

聚合物收率显著提高

并发现聚合过程中不存在链终止反应．产物分子量可通过体系中的水含量进行控制

即使当水加入量在Ｈ２Ｏ／ＰＷ１２（ｍｏｌ比）高达３０时

聚合反应仍可正常进行．而按文献［２

３］报道

在不加?...

Abstract

The reaction behavior of water in tetrahydrofuran polymerization initiated by a heteropolyacid

H3PW12O40 in the presence of ethylene oxide was studied.The variation of components during polymerization was monitored by gas chromatography.Most of water was converted in the earlier stage of the polymerization into ethylene glycol

which was consumed in the subsequent reaction process through chain transfer reaction.Water could not take part in the initiation reaction to start a polymer chain and might reduce the activity of the polymerization.Low molecular weight glycol such as ethtlene or butylene or butylene glycol has a similar effect with water on controlling the molecular weight of the polymer.The molecular weight of the product can be predicted by an equation based upon concentrations of molecular weight controller and heteropolyacid

and conversion of polymerization.

关键词

杂多酸四氢呋喃阳离子聚合分子量调节剂

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