【摘要】 通过溶液法,成功地制备了氧化铝掺杂聚酰亚胺纳米复合薄膜。探讨了Al2O3用量对聚酰亚胺纳米复合薄膜拉伸强度、热性能、电气强度的影响。结果发现,当Al2O3的质量分数达到5%时,整个复合体系的拉伸强度达到最大,相对于聚酰亚胺母体,复合材料的拉伸强度提高了16%;当Al2O3用量较小时,对聚酰亚胺纳米复合薄膜的Td10的影响不大,但当Al2O3的质量分数超过15%时,Td10则随Al2O3用量的增加而下降;同时实验结果表明,Al2O3的引入可以在一定程度上改善其复合体系的电气强度。更多还原

【Abstract】 A series of Al₂O₃ doped polyimide （PI） composite films was successfully prepared via solution process,and the effect of the content of Al₂O₃ on the tensile strength,thermal property and breakdown strength of the composite films was studied. The result showed when the mass percentage of Al₂O₃ was 5%,the tensile strength of the composite films was the maximum,16% higher than that of PI matrix resin; when the content of Al₂O₃ was small,its effect on T d10 was not obvious,but when the content of Al₂O₃ was more than 15%,T d10 decreased with the increase of the content of Al₂O₃. The result also showed the breakdown strength of the composite films was improved by doping with Al₂O₃.更多还原