Accession Number:

AD0683111

Title:

CERTAIN PROPERTIES OF PLASTICS AT LOW TEMPERATURES,

Descriptive Note:

Corporate Author:

FOREIGN TECHNOLOGY DIV WRIGHT-PATTERSON AFB OHIO

Report Date:

1968-07-29

Pagination or Media Count:

8.0

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

Subject Categories:

  • Laminates and Composite Materials

Distribution Statement:

APPROVED FOR PUBLIC RELEASE