热致液晶共聚酯酰胺／PET共混物的流变性能和原位增强特性

采用Ｉｎｓｔｒｏｎ３２１１型毛细管流变仪研究了ＰＥＡ／ＰＥＴ共混物的流变性能，据此探讨共混物熔体的可纺性，讨论了共混物配比与复合纤维力学性能的关系，并且偏光显微镜，扫描电镜研究纤维的结构。结果表明，共混物的表观粘度低于ＰＥＴ的粘度，当ＰＥＡ为１０％，共混物的表观粘度达到最小值；且ＰＥＡ含量低于１０％时，共混物的可纺性即，表现出良好的原位增强效果。

Rheological Properties and In-situ Reinforcement of Liquid Crystalline Copolyesteramide/Poly(ethylene terephthalate) Blends

The binary blends of liquid crystalline copolyesteramide(PEA) and poly(ethyleneterephthalate, PET) were studied by Instron 3211 type capillary rheometer, The spinnability of the blend melts was inverstigated based on their rheological properties- The relationship between the mechanical properties and structure was discussed. The results show that the viscosity of blends is lower than that of PET and there is a minimum of viscosity at 10%PEA content. When the content of PEA is less than 10%, the blends are well-spinnable,and the composite fibers have a well-developed highly oriented fibrillar structure along the fiber axis. As the PEA is 5%, good in-situ reinforcement can be obtained.