Development of high dielectric polyimides containing bipyridine units for polymer film capacitor
作者:Xinwen Peng、Wenhui Xu、Linlin Chen、Yichun Ding、Tianrou Xiong、Shuiliang Chen、Haoqing Hou
DOI:10.1016/j.reactfunctpolym.2016.07.017
日期:2016.9
can be just operated below 200 °C. Great effort has been put into exploring high temperature polymer dielectrics to fulfill the demand of high temperature applications, such as the aerospace and military power supply. In this study, a series of polyimides containing bipyridine units with good dielectric performance and high temperature capability were prepared by using a newly synthesized diamine monomer
具有高介电常数,低介电损耗,高击穿强度和高温能力的聚合物电介质对于诸如电容储能的应用具有吸引力。市售的聚合物电介质,例如双轴取向聚丙烯(BOPP),聚对苯二甲酸乙二醇酯(PET),聚萘二甲酸乙二醇酯(PEN),聚碳酸酯(PC)和聚偏二氟乙烯(PVDF)可以在以下操作200℃。为了满足诸如航空航天和军事电源之类的高温应用的需求,人们已经在探索高温聚合物电介质上付出了巨大的努力。在这项研究中,通过使用新合成的二胺单体(5,5'-双[[4-氨基)苯氧基] -2,制备了一系列具有良好介电性能和高温性能的联吡啶单元的聚酰亚胺。2'-联吡啶(BPBPA))。这些聚酰亚胺具有较高的介电常数。如所合成的聚酰亚胺可以高达7.2,介电损耗<0.04,并且能量密度高达2.77J / cm 3。此外,聚酰亚胺的玻璃化转变温度(Tg)高,为275-320°C,抗张强度为175-221 MPa。这些获得的聚酰亚胺有望