摘要
以环氧树脂作为基体、双氰胺和2-乙基-4-甲基咪唑作为固化剂体系、颗粒尺寸在38.0nm^2.67μm范围的钛酸钡(BaTiO3)作为高介电填充组分,采用溶液共混合旋涂工艺,制备了不同BaTiO3含量的0-3型BaTiO3/环氧复合材料膜,研究分析了环氧树脂固化工艺的确定以及不同BaTiO3含量的复合材料的晶相及显微结构。研究表明,固化剂体系含量占环氧树脂质量分数为6%时,固化温度约120℃(1h);受钛酸钡粒子的影响,复合材料基体相聚合物有序排列的分子结构被破坏,环氧树脂分子链的排列密度降低;BaTiO3质量分数为0.6时,复合材料中陶瓷粉末的分散效果最佳。
In this work, epoxy resin was chosen as polymer matrix, dicyandiamide and 2-ethyl-4-methyl imidazole as curing system and BaTiO3, which particle sizes are in the range of 38.0nm to 2.67/μm, as high dielectric filler component. BaTiO3/epoxy 0-3 composite films with different BaTiO3 content were fabricated by solution blending and spin coating method. The curing processes were analyzed and the XRD and microstructure of the composites were analyzed. The results show that the curing temperature is about 120℃ （lh） for curing agent is in the amount of 6wt% of epoxy. The addition of BaTiO3 particles has destroyed the ordered molecular structure of epoxy resin and reduced array density of epoxy molecular chain. When the mass fraction of BaTiO3 is 0. 6, the distribution of BaTiO3 powder and the dielectric properties of the composites are in optimization.
出处
《功能材料》
EI
CAS
CSCD
北大核心
2008年第3期367-370,共4页
Journal of Functional Materials
基金
国家自然科学基金重大国际合作资助项目(50410179)
关键词
复合材料
钛酸钡
环氧
固化工艺
composites
barium titanate
epoxy
curing process
