中文摘要：

利用FT-IR、DSC、TG、DMA测试技术对第二单体分别为醋酸乙烯酯和丙烯酸甲酯的2种共聚丙烯腈纤维进行结构和性能测试,并对2种纤维的染色性能进行研究。DSC测试结果表明,以醋酸乙烯酯为第二单体的共聚丙烯腈纤维的玻璃化转变温度低于以丙烯酸甲酯为第二单体的共聚丙烯腈纤维,且二者分解温度接近,都高于300℃。TG测试结果显示二者热稳定性差异不大,在相同条件下以醋酸乙烯酯为第二单体的共聚丙烯腈纤维较以丙烯酸甲酯为第二单体的共聚丙烯腈纤维有更好的染色性能。

英文摘要：

The structures and properties of two types of copolyacrylonitrile prepared with different second monomers which are methyl acrylate and vinyl acetate were tested by FT-IR,DSC,TG and DMA techniques.The dyeabilities were also studied.The DSC results show that the glass transition temperature of copolyacrylonitrile whose second monomers prepared with vinyl acetate（Ⅰ） is lower than that of copolyacrylonitrile with methyl acrylate as the second monomers（Ⅱ）.TG tests show that the decomposition temperatures of the two are very much alike,which are over 300℃and their thermal stabilities exhibit little difference.The dyeing behavior ofⅠis better thanⅡunder the same conditions.