Accession Number:

ADB207560

Title:

Development of Improved LOX-Compatible Laminated Gasket Composite

Descriptive Note:

Final summary rept. 16 Jun 1965-16 Jun 1966

Corporate Author:

WHITTAKER CORP SAN DIEGO CA NARMCO RESEARCH AND DEVELOPMENT DIV

Personal Author(s):

Report Date:

1966-08-01

Pagination or Media Count:

250.0

Abstract:

Various testing procedures, including load decay, compressive modulus, and leak, were made to develop a new cryogenic gasket compatible with liquid oxygen LOX. These testing procedures were also employed to demonstrate shortcomings of existing cryogenic gaskets, including fiberglass-filled Teflon, encapsulated, and impregnated asbestos. Data are presented indicating that cold flow is the major problem of fluorocarbon polymers, which are frequently considered because of the LOX compatibility. Attempts were made to restrict the cold flow of the fluorocarbon materials by utilizing various fillers and encapsulated configurations. Conventional fillers, reinforcements, and encapsulation techniques were not effective in minimizing cold flow to the required extent. Further consideration of the need to overcome this problem led to the development of a glass fabric laminated structure in which the glass fiber bundle was not completely saturated with fluorocarbon polymer binder was developed. This permitted mechanical compressibility, not subject to drastic changes in compressive modulus when exposed to cryogenic temperatures. jg p4

Subject Categories:

  • Laminates and Composite Materials
  • Inorganic Chemistry
  • Polymer Chemistry
  • Adhesives, Seals and Binders

Distribution Statement:

APPROVED FOR PUBLIC RELEASE