摘要
采用湿法混合工艺制备了短切石英纤维增强的PMR型聚酰亚胺复合材料模塑粉,使用热模压一次成型技术制备了聚酰亚胺树脂基复合材料,对复合材料的性能进行了系统研究。研究结果表明:短切石英纤维增强的复合材料具有优异的热性能和良好的力学性能,纤维含量对复合材料玻璃化转变温度和热失重温度影响不大,对材料的力学性能影响显著。复合材料具有优异的介电性能,在1 kHz^18 GHz宽频范围内具有稳定的介电常数和介电损耗。
The short quartz fiber reinforced polyimide composites （SQF/PI） were prepared by thermal curing of B-staged molding powders, which were obtained by impregnating of short quartz fibers with PMR monomer solution in ethyl alcohol followed by thermal baking up to 220℃. The experimental results demonstrate that the fully-cured SQF/PI composites exhibit high thermal stability and good mechanical properties, and the fiber content has little influence on the thermal property but great influence on the mechanical property. The SQF/PI composites show an excellent dielectric property, stable dielectric constant and dissipation factor in the broad frequency range from 1 kHz to 18 GHz.
出处
《复合材料学报》
EI
CAS
CSCD
北大核心
2006年第5期79-83,共5页
Acta Materiae Compositae Sinica
基金
国家杰出青年基金项目(59925310)
关键词
聚酰亚胺
复合材料
介电性能
热性能
polyimide
composites
dielectric property
thermal property
