By Lieng-Huang Lee (auth.), Lieng-Huang Lee (eds.)
New applied sciences continually generate new calls for for unique fabrics for use in critical environments. The swift advancements of aerospace industries over the last twenty years have required new fabrics to outlive severe low and high temperatures and diverse radiations. The exploration of recent power assets, e.g., sunlight and geothermal, has led us to improve new sun creditors and geothermal units. Even the hunt for brand new oils has demanded that we examine the corrosive setting of oil fields. within the telecommunication industries, optical fibers were followed widely to interchange metal conductors. despite the fact that, not one of the optical fibers can live to tell the tale abrasion or corrosion with out the applying of a coating fabric. For microelectronics, safety by way of coatings and encapsulants is deemed essential to hinder corrosion. one of many significant factors 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 truly is certainly the most important factor in inflicting cathodic or anodic corrosion. hence, water turns into the main concern in fixing longevity difficulties of varied fabrics in harsh environments.
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Additional resources for Adhesives, Sealants, and Coatings for Space and Harsh Environments
This is nominally in agreement with predictions based on free volume concepts. 5 for the elastomer, there is li t tIe, if any, change in its free volume upon simple deformation. However, there are changes' induced in the chain conformations of the elastomer which should affect Sand D. The absence of any observed change in f. implies that any induced change in S is compensated by opposite changes in D. However, it has been shown both by theory and by experiment 12 ,13 that the effect of simple tensile stress on the equilibrium degree of swelling of a rubbery material is to increase the amount of swelling.
Dudek Shine, to be published. W. van Krevelen, Properties of Polymers, 2nd Edition, Elsevier Science Publication Company, Chapter 13, (1976). L. Frisch, J. Phys. , 60, 1177 (1956). P. E. Rogers, to be published. W. E. , 12, 445 (1973). E. Rogers, ACS Symposium Series, 220, 231 (1983). D. W. Rowen, J. Polym. , I, 289 (1951). A. Barrie, "Water in Polymers," in Diffusion in. Polymers, J. S. , Academic Press, London, Chapter 8, p. 264 (1968). R. Duran, L. E. Rogers, to be published. J. A. R. Griffith+ *RARDE, Waltham Abbey, Essex, UK +Naval Research Laboratory, Washington DC, 20375 USA ABSTRACT The absorption of water by the organic polymeric materials employed in adhesive and surface coating systems is generally considered harmful.
Lee, to be published by Plenum, New York (1988). 43. 44. 45. 46. 47. 48. 49. 50. 51. 52. 53. 54. 55. 56. 57. 58. 59. 60. 61. 62. 63. 64. 65. D. Venables, "Review-Adhesion and Durability of Metal-Polymer Bonds, "J. Mater. ScL, 12, 2431 (1984). W. -0. Hennemann, H. Kollek and C. Matz, "Adhesion in Bonded Aluminum Joints for Aircraft Construction," Int. J. Adhes. , 2 (3) 115 (1986). A. S. D. Venables, "Environmental Durability of Aluminum Adhesive Joints Protected with Hydration Inhibitors," J. Mater.
Adhesives, Sealants, and Coatings for Space and Harsh Environments by Lieng-Huang Lee (auth.), Lieng-Huang Lee (eds.)