Chemical Modification of a Lignin Model Polymer via Arylboronate Ester Formation under Mild Reaction Conditions

被引：27

作者：

Korich, Andrew L. ^{[1
]}

Clarke, Kristine M. ^{[1
]}

Wallace, David ^{[1
]}

Lovine, Peter M. ^{[1
]}

机构：

[1] Univ San Diego, San Diego, CA 92110 USA

来源：

MACROMOLECULES | 2009年 / 42卷 / 16期

基金：

美国国家科学基金会;

关键词：

BLENDS; DERIVATIVES; THERMOSETS; COPOLYMERS;

D O I：

10.1021/ma901146b

中图分类号：

O63 [高分子化学（高聚物）];

学科分类号：

070305 [高分子化学与物理];

摘要：

A new approach to the chemical modification of a lignin-like polymer based on the facile formation of arylboronate ester bonds was reported. Molecular weight characterization of polymer was facilitated by acylation of the free hydroxy groups, while arylboronic acid modifying agents were reacted with polymer in a substoichiometric manner under dehydrating conditions. The results show that the polymers show characteristic arylboronate ester resonance at 7.8 ppm and lack resonances that would indicate the presence of arylboroxine or unreacted arylboronic acid in chloroform. It is also found that the key arylboronate ester linkages remain intact under the measurement conditions. Side-chain modification of the hydroxyl-containing base polymer result in a decrease in the glass transition for all chemically modified polymers.

引用

页码：5906 / 5908

页数：3

共 42 条

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