Preparation and Characterization of SiO<,2>/polyimide Composite Films
The traditional silica/polyimide (SiO<,2>/PI) hybrid films were prepared via a sol-gel process and the silica particles were obtained from hydrolyzing tetraethylorthosilicate (TEOS). In this article, a new SiO<,2>/ N, N-dimethylacetamide (DMAc) solution was prepared and the nano-sized silica particles from silica sol dispersed very well in this organic solution. The novel SiO<,2>/PI composite film was synthesized by reaction of 4, 4- Oxydianiline (ODA) and pyromellitic dianhydride (PMDA) in this new SiO <,2>/DMAC solution. The morphology of composites were characterized by SEM, the result indicated that silica particles homogeneously dispersed in polyimide films. TGA showed the decomposition temperature of the polyimide films had enhanced with the increase of silica content. Tensile tests on the films indicated an increase in the mechanical properties with the addition of silica particles.
Polyimide Silica sol Azeotrope Hybrid film
CHENG Jingdong WANG Cong HAN Keqing YU Muhuo
State Key Laboratory for Modification of Chemical Fibers and Polymer Materials, College of Material Science and Engineering, Donghua University, Shanghai 201620, P. R. China
国际会议
上海
英文
973-975
2007-10-15（万方平台首次上网日期，不代表论文的发表时间）