NEW POLYACETAL PROCESS FROM FORMALDEHYDE POLYMERIZATION IN THE PRESENCE OF A CHAIN TRANSFER AGENT

被引：16

作者：

MATSUZAKI, K ^{[1
]}

HATA, T ^{[1
]}

SONE, T ^{[1
]}

MASAMOTO, J ^{[1
]}

机构：

[1] ASAHI CHEM IND CO LTD, 2767-11 AZANIIHAMA, KURASHIKI 711, JAPAN

来源：

BULLETIN OF THE CHEMICAL SOCIETY OF JAPAN | 1994年 / 67卷 / 09期

关键词：

D O I：

10.1246/bcsj.67.2560

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

A new polyacetal process from formaldehyde polymerization in the presence of a chain-transfer agent was developed. For the acetal homopolymer, highly purified formaldehyde is polymerized in the presence of acetic anhydride. Thus, an end-capped polymer can be obtained during polymerization. This concept gave us a very simple process for manufacturing the acetal homopolymer, compared to the conventional process. If trifunctional or tetrafunctional alcoholic compounds are used as chain-transfer agents, branched poly(oxymethylene) is obtained; the melt viscosity of this branched poly(oxymethylene) shows a higher pressure dependence than the linear poly(oxymethylene). If a functional polymer is used as the chain-transfer agent, which has an active hydrogen, the acetal block copolymer, which shows characteristic properties, can be obtained.

引用

页码：2560 / 2566

页数：7