【摘要】 由端氨丙基聚二甲基硅氧烷(PDMS)、均苯四甲酸二酐(PMDA)和4,4′-二氨基二苯醚(ODA)在N,N′-二甲基乙酰胺(DMAc)中共聚,热亚胺化法制备一系列有机硅改性聚酰亚胺复合材料。通过傅里叶变换红外吸收光谱仪(FTIR)、X射线光电子能谱(XPS)分析材料的化学结构,采用扫描电子显微镜(SEM)观察材料的表观形貌,利用地面原子氧(AO)模拟设备研究了该复合膜的抗原子氧性能。结果表明,有机硅改性聚酰亚胺复合膜在AO累积通量达到2.06×1020atom/cm2时,复合膜的AO剥蚀率可以达到6.69×10-25cm3/atom,约是纯聚酰亚胺薄膜抗原子氧性能的4.5倍。更多还原

【Abstract】 A series of novel polyimide composite films modified by silicone were synthesized from aminopropyl-end capped polydimethylsiloxane(PDMS),pyromellitic dianhydride(PMDA),and 4,4′-oxydianiline(ODA) via thermal imidiazation.The films were analyzed and characterized by method of FTIR,XPS and SEM.The AO-resistant property of the composite films was tested by ground atomic oxygen(AO) simulation devices.It has been revealed that the AO denudation rate of composite films can be up to 6.69×10-25 cm3/atom when the AO flux is up to 2.06×1020 atom/cm2.The AO-resistant property of composite films is about 4.5 times of that of pure polyimide films.更多还原