热致液晶共聚酯/PA6/RSMA原位复合材料 1.RSMA对热致液晶共聚酯/PA6共混体系的增容作用

IN-SITU COMPOSITES BASED ON LIQUID CRYSTALLINE COPOLYESTER/M6/RSMA BLENDS 1. COMPATIBILIZING EFFECT OF RSMA ON LIQUID CRYSTALLINE COPOLYESTER/PA6 BLENDS

选用 Ｖｅｃｔｒａ Ａ９５０热致液晶共聚酯（ＬＣＰ），制备热致液晶共聚酯（ＬＣＰ）／聚ＭＫＲ ６（ＰＡ６） ／苯乙烯一马来酸酐无规共聚物（ＲＳＭＡ）三元共混物，采用注射成型的方法实现原位复合测定复合材料 的熔体流变性能、ＦＴＩＲ光谱、动态力学性质和共混物形态结构，研究了ＲＳＭＡ对聚酰胺６／热致液晶 共聚酯共混体系的增容作用．结果表明， ＲＳＭＡ的加入提高了 ＬＣＰ／ＰＡ６共混体的熔体粘度； ＲＳＭＡ 与 ＬＣＰ和 ＰＡ６发生酯化、酰胺化反应，改善了 ＬＣＰ与 ＰＡ６之间的相容性，使两者的玻璃化温度相 互靠近，提高了ＬＣＰ在ＰＡ ６基体中的分散，增强了两相之间的界面粘接．

The ternary liquid crystalline polymer (LCP)/polyamide 6(PA6)/styrene--maleic anhydride copolymer (RSMA) blends were prepared by twin--screw Brabender Plasticorder. The in--situ composite plates were injection molded. The LCP employed was a commercial copolyester, Vectra A950. The rheological behavior, Fourier transform infrared spectroscopy (FTIR), dynamic mechanical (DMA) properties of the composites and morphological structure of the blends were systematically studied. The results showed that there are amide reactions between RSMA and PA6, and ester reaction between RSMA and LCP. RSMA enhances the interaction between LCP and PA6. increases the viscosity of the LCP/PA6 blend melt. The two glass transitions of PA6 and LCP in LCP/PA6 blends shift toward each other with the addition of RSMA. RSMA improves the compatibility between LCP and PA6, enhances the phase dispersion and the interfacial adhesion between the LCP and PA6 phases.