表面改性纳米BaTiO_3杂化聚酰亚胺薄膜的合成及其热性能

Synthesis and Thermal Performance of PI/BaTiO_3 Hybrid Films

以3,3',4,4'-联苯四酸二酐和4,4'-二氨基二苯醚为原料,通过原位聚合和流延成膜法制备了不同纳米BaTiO3含量的聚酰亚胺(PI)/BaTiO3杂化膜。采用不同的硅烷偶联剂对纳米BaTiO3进行表面改性,发现γ-巯丙基三乙氧基硅烷(KH590)的改性效果较好。大部分杂化膜在质量损失5%的温度都较纯膜有不同程度的升高,最多升高了18℃,说明PI/BaTiO3杂化膜较纯膜具有更好的耐热性能,且热分解温度均高于520℃。

Polyimide（ PI）/BaTiO3 hybrid films were synthesized by in-situ polymerization of 4,4＇- oxydianiline with 3,4,3＇ ,4＇-biphenyhetracarboxylic dianhydride, and casting technology using nanosized BaTiO3 as an adulterant, which was surface modified by silane coupling agents. Results revealed that mecaptopropyhriethoxylsilane can get a better effect comparison with other silane coupling agents. Must of the films exihibited the higher temperatur in mass loss of 5% than the pure PI film. The thermal deeompostion temperature of the films were higher than 520 ℃.