摘要
通过熔融纺丝法制备热致性液晶(TLCP)/聚苯硫醚(PPS)原位成纤共混纤维。TLCP微纤的形成将有效增强PPS基体的力学性能,并能优化纺丝工艺。考虑到实际纺丝过程是一个非等温结晶过程,因而首先研究了共混纤维的非等温结晶动力学行为。采用差示扫描量热仪(DSC),通过非等温结晶方法研究了TLCP微纤对PPS基体结晶行为的影响,并用Jeziorny模型描述了非等温动力学。研究表明,TLCP/PPS原位成纤共混纤维的非等温结晶动力学过程能够使用Jeziorny模型来描述。在共混过程中,TLCP微纤结构起到异向成核的作用,提高结晶速率和结晶温度,降低半结晶时间。此外,采用扫描电镜(SEM)观察了挤出共混物表面形貌及共混纤维的TLCP微纤结构。
The thermal liquid crystal polymer（TLCP） /polyphenylene sulphide（PPS） in-situ microfibril forming hybrid fiber was prepared by melt spinning method.The formation of TLCP microfibrils enhances the mechanical properties of PPS matrix and optimize the spinning process.Considering that the actual spinning process is a non-isothermal crystallizing course,the non-isothermal crystallization kinetics of PPS/TLCP hybrid fiber was studied firstly.Differential scanning calorimetry（DSC） was used to investigate the influence of TLCP microfibrils on the crystallization of PPS matrix in accordance with non-isothermal crystallization and Jeziorny model was utilized to analyze the parameters.The results showed that the microfibrils of TLCP,which acted as a heterogeneous nucleation agent in the course of blending with linear PPS matrix,increased the onset crystallization temperature and lowered the half time,thus accelerated the crystallization process.Besides,the morphology of blend and the microfibrils of TLCP of hybrid fiber were observed through scanning electron microscope（SEM）.
出处
《纺织学报》
EI
CAS
CSCD
北大核心
2010年第3期7-10,共4页
Journal of Textile Research
基金
上海市重点学科建设资助项目(B603)
上海市科委振兴东北项目(1071258207)
