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首页> 外文期刊>Journal of Applied Polymer Science >STYRENE-MALEIC ANHYDRIDE COPOLYMERS - SYNTHESIS, CHARACTERIZATION, AND THERMAL PROPERTIES
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STYRENE-MALEIC ANHYDRIDE COPOLYMERS - SYNTHESIS, CHARACTERIZATION, AND THERMAL PROPERTIES

机译：苯乙烯-马来酸酐共聚物-合成，表征和热性质

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摘要

Radical copolymerization of styrene and maleic anhydride have been carried out in N,N-dimethylformamide at 60 degrees C using 2,2'-azobisisobutyronitrile as initiator. The copolymer compositions were determined using an aqueous conductometric direct titration method. Monomer reactivity ratios were calculated by Fineman-Ross, Kelen-Tudos, and conversion-based Kelen-Tudos methods. Gel permeation chromatography was used to determine molecular weights and polydispersity indexes. The thermal degradation and energy of activation of the degradation process were determined by several thermogravimetric analysis and differential scanning calorimetric models. The thermal degradation of the copolymer is a two-stage process, the major degradation being the second stage. The copolymer degrades at a lower temperature than polystyrene. (C) 1996 John Wiley & Sons, Inc. [References: 39]
机译：苯乙烯和马来酸酐的自由基共聚反应是在60℃的N，N-二甲基甲酰胺中，使用2,2'-偶氮二异丁腈作为引发剂进行的。使用含水电导率直接滴定法测定共聚物组成。单体反应率通过Fineman-Ross，Kelen-Tudos和基于转化的Kelen-Tudos方法计算。凝胶渗透色谱法用于测定分子量和多分散指数。通过几种热重分析和差示扫描量热模型确定了降解过程的热降解和活化能。共聚物的热降解是一个两阶段的过程，主要的降解是第二阶段。该共聚物在比聚苯乙烯低的温度下降解。 （C）1996 John Wiley＆Sons，Inc. [参考：39]

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