Add time:08/09/2019         Source:sciencedirect.com

A tin-containing compound, bis(triphenyltin) oxide (BTO), was added to two polymeric materials in an effort to reduce the erosion of the materials in the presence of atomic oxygen. The BTO was added to a solution of a thermoplastic polyetherimide, and to the amic acid solution of a polyimide thermoset before curing. The films of these materials were tested in the laboratory by exposing them to atomic oxygen from a plasma generator. Subsequently, they were exposed to the Low Earth Orbit (LEO) on two Space Shuttle flights. In all cases, the BTO-containing materials exhibited significantly less mass loss than the corresponding pure polymer. Analysis by X-ray photoelectron spectroscopy showed that after exposure to atomic oxygen, the BTO-containing films had a predominance of tin oxide on their surfaces. This could serve as a barrier to resist further erosion.

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