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首页> 外文期刊>Journal of Applied Polymer Science >POLY(VINYL ALCOHOL) MODIFIED WITH CARBOXYLIC ACID ANHYDRIDES - CROSSLINKING THROUGH CARBOXYLIC GROUPS
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POLY(VINYL ALCOHOL) MODIFIED WITH CARBOXYLIC ACID ANHYDRIDES - CROSSLINKING THROUGH CARBOXYLIC GROUPS

机译：羧酸酐改性的聚乙烯醇-通过羧酸基团交联

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摘要

The reaction of carboxylic acid anhydride with poly(vinyl alcohol) (PVA) leads to vinyl alcohol-vinyl ester copolymers which contain carboxylic acid groups. Esterification enables degrees of modification to be reached which depend on the chemical structure of the anhydride introduced and the ratio of the reagents in the feed. The copolymers obtained were characterized by spectroscopic techniques, elemental analysis, and thermal methods. These half-esters reacted in a second step with aromatic diglycidyl ethers to obtain tridimensional networks. This crosslinking reaction through the carboxylic groups was studied by differential scanning calorimetry. The water absorption of the linear and crosslinked. polymers was determined gravimetrically as a function of time at room temperature. (C) 1997 John Wiley & Sons, Inc. [References: 8]
机译：羧酸酐与聚乙烯醇（PVA）的反应产生了包含羧酸基团的乙烯醇-乙烯基酯共聚物。酯化使得能够达到改性程度，该改性程度取决于引入的酸酐的化学结构和进料中试剂的比例。通过光谱技术，元素分析和热方法表征获得的共聚物。这些半酯在第二步中与芳族二缩水甘油基醚反应以获得三维网络。通过差示扫描量热法研究了通过羧基的交联反应。线性和交联的吸水率。在室温下通过重量分析测定聚合物作为时间的函数。 （C）1997 John Wiley＆Sons，Inc. [参考：8]

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