Abstract
Low earth orbit (LEO) space missions have shown that an ambient atomic oxygen (AO) environment interacts with spacecraft materials, resulting in surface erosion and significantly affects the performance of the materials, particularly polymeric films. To ensure durability, the vulnerable polymeric film surfaces should be either replaced with AO-resistant materials or protected by applying suitable coatings. This review discusses briefly the degradation mechanism of Kapton film as a result of AO attack. The requirements for the selection of protective coatings for Kapton flexible solar array blankets are discussed. Different groups of materials presently being used as protective coatings are outlined. This is followed by a discussion of the current status of the coating materials development, application processes, performance and their durability in protecting Kapton film from the synergism of the LEO environment. The emphasis is placed on developing new AO-resistant materials. Ground simulation testing requirements are reviewed briefly. This review serves as a useful guide for the selection of a protective coating for Kapton flexible solar array blanket applications.
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