中文摘要：

采用液晶环氧预聚物（PHQEP）与有机蒙脱土（OMMT）共混改性环氧树脂制备三元共混体系的环氧基复合材料。用X射线衍射法（XRD）测试了有机化蒙脱土在被插层前后片层间距的变化,通过DSC、TGA及SEM等对PHQEP/OMMT增韧改性环氧树脂固化体系的力学性能,热性能及微观相态结构进行了研究。结果表明：当PHQEP质量分数为5%,添加1.5%的有机蒙脱土可以使环氧树脂的冲击强度达到最大值23.43 kJ/m2,比纯环氧树脂提高2倍左右,玻璃化转变温度及5%热分解温度比纯环氧树脂分别高出15℃和27℃。PHQEP与OMMT的加入使纳米复合材料的力学性能和热性能得到明显提高。

英文摘要：

The epoxy matrix composites of ternary blends were prepared from liquid crystalline epoxy prepolymer（PHQEP） and organic montmorillonite（OMMT） blending modification of epoxy resin.The changes of lamellar spacing of organic montmorillonite beore and after intercalation were tested by X-ray diffraction（XRD）.The mechanical properties,thermal performance and morphology of PHQEP/OMMT toughening modified epoxy resin curing system were investigated by DSC,TGA and SEM.The results showed that the impact strength of the epoxy resin was achieved the maximum 23.43 kJ/m2 and increased by about two times than that of pure epoxy resin,when mass fraction of PHQEP was 5% and organic montmorillonite was 1.5%.The glass transition temperature and 5% thermal decomposition temperature were increased by 15 ℃ and 27 ℃,respectively than that of pure epoxy resin.The mechanical and thermal performance of nanocomposites were improved significantly by adding PHQEP and OMMT.