聚偏氟乙烯/钛酸钡高介电复合材料的制备  

Preparation of PVDF / BaTiO_3 High Dielectric Composite

作　　者：雷振刚 孙静[1,2] 朱永军[2,3] 韦良强[1,2] 罗筑[1,3] 黄安荣[2,3] 何敏 

机构地区：[1]贵州凯科特材料有限公司,贵州贵阳550014 [2]国家复合改性聚合物材料工程技术研究中心,贵州贵阳550014 [3]贵州大学材料与冶金学院,贵州贵阳550025

出　　处：《塑料》2014年第6期13-16,113,共5页Plastics

基　　金：创新人才计划(青年科技人才培养补助)(筑科合同[2012HK]209-14号);贵阳市人才创新创业资助项目(筑人才办合同字[2011]第04号)

摘　　要：采用微纳多层共挤技术,制备具有交替多层介电复合材料,为制备高介电性能的介电复合材料提供了1种新方法。采用微纳多层共挤装置,制备了PVDF/Ba Ti O3高介电复合材料,研究了复合材料的结构与性能。DSC测试结果表明:BT可以提高PVDF的结晶温度,是PVDF的异相成核剂。介电性能和力学性能测试结果表明:当BT质量分数为7.5%时,介电常数最高(61.43),提高了83.05%;复合材料切向的综合拉伸性能最好,拉伸强度、断裂伸长率和弹性模量分别提高了41.9%、2.35倍和73.39%,且切向的拉伸性能明显高于纵向。Ahernating multilayered dielectric composite materials were prepared by micro-nano muhilayered coextrusion technology,which provided a novel method for the preparation of high dielectric compotie. PVDF/BaTiO3 high dielectric composite were prepared by micro-nano multilayered coextrusion device. The structure and properties of composite were researched. Differential scanning calorimetry （DSC） test results showed that BT improved the crystallization temperature of PVDF and was hcterogeous nucleating agent. Dielectric performance and mechanical properties test results showed that when the content of BaTiO3 was 7.5% ,the highest dielectric constant was 61.43, and increased by 83.05% ;the tensile properties of the composites was the best, tensile strength, elongation at break and elastic modulus increased by 41.9% ,2.35 times and 73.39% ;the tangential tensile properties were better than that of longitudinal tensile properties.

关 键 词：聚偏氟乙烯 钛酸钡 高介电 微纳多层共挤 介电常数 

分 类 号：TQ325.4[化学工程—合成树脂塑料工业]