The AO-resistant Property of Polyimide Composite Films Modified by Silicone

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.