选用丙烯酰胺(AM)为共聚单体制备丙烯腈/丙烯酰胺共聚物.研究了共聚物的热性能.结果表明,AM的引入可使PAN预氧化的起始反应温度提前,在DSC曲线上形成双峰,使放热峰宽化,失重降低,降低放热反应速率,有利于促进PAN原丝在预氧化、碳化过程中形成均匀的环化梯形结构,最终可提高碳纤维的力学性能.
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