By Lieng-Huang Lee (auth.), Lieng-Huang Lee (eds.)

New applied sciences regularly generate new calls for for unique fabrics for use in serious environments. The quick advancements of aerospace industries over the last twenty years have required new fabrics to outlive severe low and high temperatures and numerous radiations. The exploration of recent power assets, e.g., sun and geothermal, has led us to boost new sunlight creditors and geothermal units. Even the quest for brand spanking new oils has demanded that we examine the corrosive surroundings of oil fields. within the telecommunication industries, optical fibers were followed extensively to exchange metal conductors. notwithstanding, not one of the optical fibers can live on abrasion or corrosion with out the applying of a coating fabric. For microelectronics, defense by way of coatings and encapsulants is deemed essential to hinder corrosion. one of many significant explanations of corrosion has been proven to be water which seems to be ample in our earthly environments. Water can assault the majority adhesive (or sealant), the interface, or the adherend. Water may also reason delamination of coating movie, and it's certainly the most important aspect in inflicting cathodic or anodic corrosion. therefore, water turns into the foremost situation in fixing longevity difficulties of varied fabrics in harsh environments.

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R. Foster, "Polymers in Caulking and Sealant Materials," L... Chem. , 64 (10), 861 (1987). B. J. E. Huang, "Effects of Environment on Performance of Polysulfide Sealants," in Ref. 1. J. M. Klosowski, "Durability of Silicone Sealants," in Ref. 1. G. Holden, "Styrenic Block Copolymers in Sealants," Elastomerics, 112 (3), 26 (1987). G. Chu, "Hot Melt Sealants Based on Thermoplastics Elastomers," in Ref. 1. M. K. L. Tan, "Durability of Acrylic, Polysulfide and Silicone Sealants Bonded to Aluminum," Durability Build.

Nearly all thermal barrier coatings for engines have( b~n concentrated on Zr02based materials applied by plasma-spraying. 12~) COATINGS FOR ELECTRONIC AND OPTICAL ENVIRONMENTS Water is not only a major ingredient for metal corrosion, it is also a key culprit for the corrosion and degradation of electronic and optical devices. In the case of optical fibers, nascent silica fibers must be protected by a polymer coating to prevent abrasion and microbendinK loss. , low surface tack, toughness, abrasion resistance).

109. 110. 111. A. D. McLean, W. J. Densley, "Exposure of Cross-linked Epoxy Resins to the Space Environment," J. Appl. Polym. , ;g, 3941 (1986). A. Garton, W. T . K. Stevenson and P. D. McLean, "The Stability of Polymers in Low Earth Orbit," Mater. Sci. , 1986. K. English, "Atomic Oxygen: Achilles' Heel of Man in Space," Mater. , 1987. 1. Yilgor, "Synthesis and Characterization of Atomic Oxygen Resistant Poly(siloxane-imide) Coatings," in Ref. 1. A. J. K. M. Swec, "Sputtered Coatings for Protection of Spacecraft Polymers," Thin Solid Films, ~, 107 (1985).

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