摘要
在超临界CO2 条件下 ,以偶氮二异丁腈 (AIBN)为引发剂成功地进行了丙烯腈的沉淀聚合反应 ,得到了粘均相对分子质量为 2× 10 4 ～ 1× 10 5的聚合物。研究发现聚丙烯腈的相对分子质量及转化率受单体浓度、引发剂用量、时间、温度及CO2压力等因素的影响。以二甲基甲酰胺为溶剂 ,将此聚合产物在小型纺丝机上进行湿法纺丝 ,可得到一定线密度的纤维。此外还用扫描电镜对聚合物及纤维的形态进行了观察。
The precipitation polymerization of acrylonitrile in supercritical carbon dioxide utilizing AIBN as a free radical initiator was studied. The viscosity average molecular weights of the polyacrylonitrile were about 2×10 4～1×10 5. It was found that the initial concentrations of acrylonitrile, the concentrations of initiator, reaction time, reaction temperature and the reaction pressure all affected the molecular weight and conversion rate of the product. Furthermore, By using DMF as solvent, such product could be spun into polyacrylonitrile filament. The morphologies of polymer product and fiber were observed using SEM.
出处
《东华大学学报（自然科学版）》
CAS
CSCD
北大核心
2002年第3期96-100,113,共6页
Journal of Donghua University(Natural Science)
关键词
超临界CO2
沉淀聚合反应
聚丙烯腈
粘均相对分子质量
湿法纺丝
supercritical CO 2, polyacrylonitrile, polymerization, viscosity average molecular weight, wet spinning
