中文摘要：

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。

英文摘要：

The liquid crystalline polymer/nylon 6 （LCP/PA6） blends with dispersed LCP microspheres were prepared. An ionomer （Zn - SPS） and a reactive copolymer （SMA） were used as compatibilizers to improve the interfacial adhesion. The effects of LCP microspheres on the strength and toughness of LCP/PA6 blends were investigated. The morphological observation of samples after tensile tests shows that the dispersed LCP microspheres are well embedded in the PA6 matrix. The holes deform to some degree after LCP microspheres are pulled out during the fracture of the samples. The mechanical tests show that the addition of LCP decreases the tensile strength of blends due to the poor adhesion between the two phases, while the compatibilizers enhanced the tensile strength. With LCP mass fraction of 10%, the tensile strength of the compatibilized system is similar to that of pure PA6. The tensile energy of compatibilized systems is higher than that of corresponding uncompatibilized systems. With LCP mass fraction of 4 %, the tensile fracture energy of Zn - SPS compatibilized system increases by 12% and 62% compared to that of LCP/PA6 and pure PA6, respectively. With LCP mass fraction of 10%, the tensile energy of SMA compatibilized system increases by 46% and 55% compared to LCP/PA6 and pure PA6, respectively. The results indicate that LCP microspheres can increase the toughness of the blends while kept the tensile strength under proper conditions.