Abstract
To improve the atomic oxygen (AO) erosion resistance of the polyimide (PI) maretials, cage-shaped poly-γ-aminopropylsiloxane (NPOSS) was synthesized from γ-aminopropyltriethoxysilane through the control of hydrolytic condensation conditions. Poly-γ-aminopropylsiloxane/methylphenylsilicone (NPOSS/MPS) hybrid films were prepared on PI samples. The physics and chemistry properties of the hybrid films surface was analyzed after exposure to AO flux in a ground AO simulated facility. The results showed that: NPOSS gathered to the spherical shapes and uniformly distributed in films, SiO 2 layer formed on the films surface after explorer and prevented the further AO erosion, mass loss and erosion rate of samples was dramatically decreased, AO erosion resistance had been increased and it could be further enhanced with the increase of NPOSS content.
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