CAJ | 학술논문

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.
통과용융방사법제비열치성액정(TLCP)/취분류미(PPS)원위성섬공혼섬유.TLCP미섬적형성장유효증강PPS기체적역학성능,병능우화방사공예.고필도실제방사과정시일개비등온결정과정,인이수선연구료공혼섬유적비등온결정동역학행위.채용차시소묘량열의(DSC),통과비등온결정방법연구료TLCP미섬대PPS기체결정행위적영향,병용Jeziorny모형묘술료비등온동역학.연구표명,TLCP/PPS원위성섬공혼섬유적비등온결정동역학과정능구사용Jeziorny모형래묘술.재공혼과정중,TLCP미섬결구기도이향성핵적작용,제고결정속솔화결정온도,강저반결정시간.차외,채용소묘전경(SEM)관찰료제출공혼물표면형모급공혼섬유적TLCP미섬결구.
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).