CAJ | 학술논문

采用机械共混及模压成型工艺将Al2O3粉体,液晶聚氨酯（DLCP）与环氧树脂（E-51）共混制备了EP/DLCP/Al2O3复合材料.对复合材料的制备工艺、Al2O3粒子表面修饰以及Al2O3含量对材料热稳定性、导电性能、导热性能及热膨胀进行了研究.结果表明：导热系数、介电常数及热稳定性随Al2O3含量的增加而增大;介电损耗、线膨胀系数随Al2O3含量的增加而减小.同时,液晶聚氨酯（DLCP）网格的存在,可降低材料的内耗,提高材料的玻璃化转变温度（Tg）.当DLCP加入量为5wt%时,复合材料的玻璃化转变温度比纯树脂提高了10-30℃,复合材料的电性能得到了增强.
채용궤계공혼급모압성형공예장Al2O3분체,액정취안지（DLCP）여배양수지（E-51）공혼제비료EP/DLCP/Al2O3복합재료.대복합재료적제비공예、Al2O3입자표면수식이급Al2O3함량대재료열은정성、도전성능、도열성능급열팽창진행료연구.결과표명：도열계수、개전상수급열은정성수Al2O3함량적증가이증대;개전손모、선팽창계수수Al2O3함량적증가이감소.동시,액정취안지（DLCP）망격적존재,가강저재료적내모,제고재료적파리화전변온도（Tg）.당DLCP가입량위5wt%시,복합재료적파리화전변온도비순수지제고료10-30℃,복합재료적전성능득도료증강.
EP/DLCP/Al2O3 composites were prepared by High-speed mixing and compression molding. The technics, nano-particle surface modification and nano-particle content of composites impact on the thermal stability and electric properties heat conducting property and the thermal expansion were studied. The results show that the thermal conductivity, dielectric constant and thermal stability increased with the content of nano-particle increasing; at the same time, dielectric loss, linear expansion coefficient reduced with the content of nano-particle increasing. And the internal friction of blends reduced, the glass transition temperature （Tg） increased. While the composites with a 5wt% of DLCP content relative to E-51, glass transition temperature increased 10-30℃ relative to E-51, the electric properties of composites increased.