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采用水相沉淀聚合法分两次加料制备了丙烯腈/丙烯酸甲酯(AN/MA摩尔比为85/15)共聚物(以后简称为AN/MA(85/15)),并在共聚物中加入0%～10%的离子液体([emim]PF6)。采用差示扫描量热仪(DSC)和熔体流动指数测试仪(MI)等测定了加入[emim]PF6前后共聚物的玻璃化转变温度(Tg),热稳定性和熔体流动性能。结果表明,[emim]PF6的加入对共聚物的Tg影响不大,共聚物的热稳定性和共聚物的熔体流动性随[emim]PF6含量的增加有显著的提高。将含有[emi m]PF6的AN/MA共聚物在200℃下熔融纺丝,熔纺法制备的初生纤维表面光滑,结构致密;但[emim]PF6的加入使初生纤维的断裂强度下降,断裂伸长率减小。
Acrylonitrile / methyl acrylate (AN / MA molar ratio 85/15) copolymer (hereinafter referred to simply as AN / MA (85/15)) was prepared by aqueous precipitation polymerization in two separate feeds and was used in the copolymer Add 0% ~ 10% ionic liquid ([emim] PF6). The glass transition temperature (Tg), thermal stability and melt flow properties of the copolymers before and after addition of [emim] PF6 were determined by differential scanning calorimetry (DSC) and melt flow index tester (MI) The results showed that the addition of [emim] PF6 had little effect on the Tg of the copolymer, and the thermal stability of the copolymer and the melt flowability of the copolymer increased significantly with the increase of the [emim] PF6 content. The AN / MA copolymers containing [emi m] PF6 were melt-spun at 200 ℃. The spun fibers prepared by the melt-spinning method had smooth surface and compact structure. However, the addition of [emim] PF6 decreased the rupture strength of primary fibers Elongation decreases.