Polycondensations of dimethyl phosphonate with diols:: SEC and 1P and 13C NMR spectroscopic studies

被引：18

作者：

Branham, KE

Mays, JW

Gray, GM ^{[1
]}

Bharara, PC

Byrd, H

Bittinger, R

Farmer, B

机构：

[1] Univ Alabama, Dept Chem, Birmingham, AL 35294 USA

[2] Absorbable Polymer Technol, Pelham, AL 35124 USA

[3] Univ Montevallo, Dept Chem, Montevallo, AL 35115 USA

来源：

POLYMER | 2000年 / 41卷 / 09期

关键词：

polymeric phosphonate esters; polycondensation; diazomethane;

D O I：

10.1016/S0032-3861(99)00483-8

中图分类号：

O63 [高分子化学（高聚物）];

学科分类号：

070305 ; 080501 ; 081704 ;

摘要：

Polymeric phosphonate esters have a variety of potential applications. These polymers can be prepared by the polycondensations of dimethyl phosphonate with certain diols. However, this method does not consistently yield high molecular weight polymers. NMR spectroscopy and size exclusion chromatography studies demonstrate that low molecular weights result from methyl group transfer from a methyl phosphonate end group to an alcohol. The inactive phosphonic acid end groups formed by this reaction can be converted into reactive methyl phosphonate end groups by treatment with diazomethane. This allows the preparation of polymers with number average molecular weights greater than 10(4) Da. (C) 2000 Elsevier Science Ltd. All rights reserved.

引用

页码：3371 / 3379

页数：9

共 18 条

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[2]

Arndt F., 1943, ORG SYNTH, V2, P165

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