Accession Number : AD0287934

Title :   MECHANISM OF WATER ABSORPTION IN GLASS-REINFORCED PLASTICS

Corporate Author : BATTELLE MEMORIAL INST COLUMBUS OHIO

Personal Author(s) : MCNEIL,D.W. ; BENNETT,B. ; LEININGER,R.I.

Report Date : 01 OCT 1962

Pagination or Media Count : 1

Abstract : The objective of this program is to determine the mechanism of water absorption by glassreinforced structures, specifically, filamentwound laminates. Elucidation of this mechanism will be of material value in the design of deepsubmergence vehicles. Experimental work was initiated with the preliminary exposure of epoxy resin slugs to hydrostatic pressure of 10,000 psi and examining them periodically for weight gain and structural changes. After 23 days' immersion at this high pressure and room temperature, maximum water absorption as reflected in weight gains was 0.5 per cent. No changes in structure were observed in 0.3-micron-thick sections cut from the exposed samples. Optimum sample configuration was established - a threepiece, hollow cylindrical construction - and samples were prepared from epoxy resin and from filament-wound cylinders. (Author)

Descriptors :   *FILAMENT WOUND CONSTRUCTION, *GLASS TEXTILES, *LAMINATES, ABSORPTION, COMPOSITE MATERIALS, DEGRADATION, EPOXY RESINS, HYDROSTATIC PRESSURE, PLASTICS, STRUCTURES, SUBMARINES, TEST METHODS, UNDERWATER, WATER

Distribution Statement : APPROVED FOR PUBLIC RELEASE