STUDY ON THE RING-OPENING POLYMERIZATION OFε- CAPROLACTONE INITIATED BY HYDROXYL ACIDS

XIE Deliang; JIANG Biao; YANG Changzheng

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STUDY ON THE RING-OPENING POLYMERIZATION OFε- CAPROLACTONE INITIATED BY HYDROXYL ACIDS

Research Article | 更新时间：2021-03-19

- STUDY ON THE RING-OPENING POLYMERIZATION OFε- CAPROLACTONE INITIATED BY HYDROXYL ACIDS
- Acta Polymerica Sinica Issue 5, Pages: 532-537(2000)
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- Published：20 October 2000，
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XIE Deliang, JIANG Biao, YANG Changzheng. STUDY ON THE RING-OPENING POLYMERIZATION OFε- CAPROLACTONE INITIATED BY HYDROXYL ACIDS. [J]. Acta Polymerica Sinica (5):532-537(2000)
DOI：

XIE Deliang, JIANG Biao, YANG Changzheng. STUDY ON THE RING-OPENING POLYMERIZATION OFε- CAPROLACTONE INITIATED BY HYDROXYL ACIDS. [J]. Acta Polymerica Sinica (5):532-537(2000) DOI：

摘要

研究了水、醇、羧酸存在下ε-己内酯开环聚合的情况

发现在适当温度下 (80℃ )

羧基并不引发ε-己内酯的开环聚合

但对羟基引发ε-己内酯开环聚合起加速作用

而且催化能力与酸度有关 .进而又对羟基酸(乙醇酸、DL 苹果酸、柠檬酸 )引发ε-己内酯开环聚合做了研究

合成了一系列含不同数目遥爪羧基的α-羟基-ω-羧基(1

3)己内酯低聚物 (HCPCL)

并对其结构做了酸值滴定、羟值滴定、UV、FTIR与1H NMR分析 .对羧基催化羟基引发ε-己内酯开环聚合的机理做了分析.

Abstract

The ring-opening polymerization of ε-caprolactone (CL) in the presence of water

alcohol and carboxyl acid at moderate temperature (80℃) has been investigated

indicating that carboxyl group does not initiate the polymerization of CL

but can accelerate the hydroxyl-initiated polymerization of CL

and the catalytic-ability of the carboxyl acid depends upon its acidity. Thus

a series of α -hydroxyl-ω-carboxyl (1

3) functional telechelic oligocaprolactones were synthesized by the polymerizations of CL initiated with hydroxy-acids glycollic acid

DL-malic acid

or citric acid at a moderate temperature (80℃).The products were characterized by the acid-base titration

hydroxyl value titration

FTIR and 1H-NMR analysis

respectively.The mechanism of carboxyl-catalyzed hydroxy-initiated CL polymerization was also described.

关键词

羟基酸ε-己内酯开环聚合

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