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采用水相沉淀聚合法制备了不同摩尔配比的丙烯腈(AN)-醋酸乙烯酯(VAc)共聚物,通过静电纺丝制备了不同聚合物电纺液浓度及不同共聚配比的聚丙烯腈-醋酸乙烯酯复合纤维膜,利用偏光显微镜、差示扫描量热分析(DSC)、热重分析(TG)和力学性能测试等手段对电纺纤维进行表征。结果表明,随电纺液浓度升高,电纺纤维直径变粗;随着醋酸乙烯酯含量的增加,PAN-VAc复合纤维热稳定性增加,其拉伸强度和拉伸模量增加。经冷压处理后,AN/VAc摩尔比为85/15的电纺膜的拉伸强度增加幅度达52.93%,而拉伸模量增加幅度达40.89%。
Acrylonitrile (AN) -vinylacetate (VAc) copolymers with different mole ratios were prepared by aqueous precipitation polymerization. Polyacrylonitrile (PAN) with different concentration and different copolymerization ratio was prepared by electrospinning - Vinyl acetate composite fiber membrane, and the electrospun fibers were characterized by polarized light microscopy, differential scanning calorimetry (DSC), thermogravimetric analysis (TG) and mechanical properties testing. The results showed that the diameter of electrospun fibers became thick with the concentration of electrospinning liquid. With the increase of vinyl acetate content, the thermal stability of PAN-VAc composite fibers increased, and the tensile strength and tensile modulus of PAN-VAc composite fibers increased. After cold pressing, the tensile strength of electrospun films with AN / VAc molar ratio of 85/15 increased by 52.93%, while the tensile modulus increased by 40.89%.