Accession Number : AD0683111

Title :   CERTAIN PROPERTIES OF PLASTICS AT LOW TEMPERATURES,

Corporate Author : FOREIGN TECHNOLOGY DIV WRIGHT-PATTERSON AFB OHIO

Personal Author(s) : Levin,V. A. ; Naumenkov,P. G. ; Shchitov,M. V.

Report Date : 29 JUL 1968

Pagination or Media Count : 8

Abstract : The strength characteristics of several plastics were determined in the +20 to -196C temperature range. The plastics examined were: (1) fiberglass SVAM with BF-4 binder; (2) SVAM with epoxy 1200; (3) fiberglass KAST-V with BF-4 binder; (4) textolite PT; and, (5) polyvinylchloride. There was no change in flexural strength (according to GOST 4648-56) in 4 and 5; 1 and 2 reached maxima and delaminated. All the materials showed gradual increase in Brinell hardness with decreasing temperature (GOST 4670-62). There was almost no change in impact strength (GOST 4647-55) in 4 and 5; the fiberglasses reached maxima in the -30 to -60C region before delamination. Tensile strengths (GOST 4649-55) of 4 and 5 were reduced 10-15% on repeated freezing; the delamination in the others was more pronounced the lower the temperature. Shear strength (GOST 10044-38) of 1, 2, and 3 increased sharply, with 1 and 2 reaching maxima at -80 to -100C; 5 went through a sharp maximum at about -100C, and the shear strength of 4 increased to about -30C and then decreased gradually. Some of these materials may be used under cryogenic condition. (Author)

Descriptors :   (*PLASTICS, LOW TEMPERATURE), REINFORCED PLASTICS, GLASS TEXTILES, LAMINATES, BINDERS, HARDNESS, DUCTILITY, TENSILE PROPERTIES, USSR

Subject Categories : Laminates and Composite Materials

Distribution Statement : APPROVED FOR PUBLIC RELEASE