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制备了分散相呈球状微粒形貌的液晶聚合物/尼龙6(LCP/PA6)共混体系,选用离聚物磺化聚苯乙烯锌盐(Zn-SPS)和反应性嵌段共聚物苯乙烯-马来酸酐共聚物(SMA)作为体系的增容剂,探讨了在相间相互作用得以改善时,利用LCP微球改善LCP/尼龙6共混体系韧性的可能性。试样受拉后的形貌观察表明,在增容体系中,LCP微球很好地镶嵌在尼龙6基体中,粒子脱落的空洞发生了较大的形变。力学性能测试结果表明,LCP的加入使材料的拉伸强度低于纯尼龙6,加入增容剂后共混材料拉伸强度有所提高,其中LCP/PA6(质量比10/90)共混体系增容后的拉伸强度与纯尼龙6相当。所研究的增容体系的拉伸断裂吸收能均比未增容体系有所增加。其中,当LCP的质量分数为4%时,Zn-SPS增容体系的拉伸断裂吸收能比未增容体系和纯尼龙6分别增加了12%和62%;当LCP的质量分数为10%时,SMA增容体系的拉伸断裂吸收能比未增容体系和纯尼龙6分别增加了46%和55%。表明在适当条件下,利用LCP微球可以在保持共混体系的拉伸强度的同时提高材料的韧性。
The liquid crystal polymer / nylon 6 (LCP / PA6) blends with spherical morphology were prepared. The ionomer sulfonated polystyrene zinc salt (Zn-SPS) and the reactive block copolymer styrene - maleic anhydride copolymer (SMA) as a system compatibilizer to explore the possibility of improving the toughness of LCP / Nylon 6 blends with LCP microspheres when the interphase interaction is improved. The morphological observation of the sample after tension shows that in the compatibilization system, the LCP microspheres are well embedded in the nylon 6 matrix, and the delaminated particles undergo larger deformation. The mechanical properties test results show that the tensile strength of the material is lower than that of the pure nylon 6 by the addition of LCP, and the tensile strength of the blend increases after adding the compatibilizer. The LCP / PA6 (mass ratio 10/90) blends Tensile strength after compatibilization and pure nylon 6 quite. The tensile fracture absorption capacity of the compatibilized system studied is higher than that of the uncapped system. Among them, when the content of LCP is 4%, the tensile rupture absorption of Zn-SPS compatibilizer increases by 12% and 62% respectively compared with un-compatibilized system and pure nylon 6; when the mass fraction of LCP is 10% , Tensile elongation at break of SMA compatibilization system can be increased by 46% and 55% respectively compared with un-compatibilized system and pure nylon 6. It shows that LCP microspheres can improve the toughness of the blends while maintaining the tensile strength of the blends under appropriate conditions.