凝固浴条件对对位芳纶成形的影响  

The influences of coagulation bath conditions on para-Aramid formation

作　　者：李亚洲[1] 胡祖明[1,2] 马禹[1,2] 于俊荣[1,2] 诸静[1,2] 王彦[1,2] 

机构地区：[1]东华大学材料科学与工程学院,上海201620 [2]东华大学纤维材料改性国家重点实验室,上海201620

出　　处：《高科技纤维与应用》2015年第6期24-27,34,共5页Hi-Tech Fiber and Application

基　　金：国家863计划(2012AA03212);上海市自然科学基金(51473031)

摘　　要：将聚对苯二酰对苯二胺(PPTA)浆液浸入凝固浴来模拟纺丝过程中纤维的凝固过程。通过偏光显微镜分析了不同凝固浴条件下非溶剂在PPTA浆液中的扩散速率;用XRD分析了不同凝固浴条件下PPTA膜的结晶情况;用SEM分析了不同凝固浴条件下PPTA膜的表面形貌。结果表明,随着凝固浴温度和硫酸质量分数的升高,PPTA膜的致密程度不断下降,且由于边缘和中心区域相分离模式的不同其致密程度也不同。验证了PPTA纤维在凝固浴中形成皮芯层结构的结论。In this paper, PPTA dope was immersed in coagulation bath to simulate the solidification process in spinning process, polarized light microscopy was used to study diffusion rate in PPTA dope of nonsolvent, XRD was utilized to explore crystallinity of PPTA membrane under the condition of different coagulation bath. SEM was applied to observe surface morphology of PPTA membrane, The results show that compact degree of PPTA membrane decline when temperature and concentration of coagulation bath increase, compact degree is differ- ent, because of the difference of phase separation model on the edge and center. The results explain why PPTA fibers have a skin-core structure. Key words：

关 键 词：聚对苯二酰对苯二胺膜 凝固浴 表面结构 相分离 皮芯层 

分 类 号：TQ342.72[化学工程—化纤工业]