Accession Number:

AD0903501

Title:

Evaluation of Materials Applicable to Aerospace Systems

Descriptive Note:

Summary rept. 1 Sep 1970-29 Feb 1972

Corporate Author:

DAYTON UNIV OH RESEARCH INST

Report Date:

1972-06-01

Pagination or Media Count:

226.0

Abstract:

The second section of this report describes the evaluation of nonmetallic materials. One program discussed involves the storage life of elastomeric fuel tank sealants. Thirty- three materials manufactured by five different companies are involved in this 24 month program. The hydrolytic stability of several potting compounds was also determined. Included were flexible epoxies, polyester and polyether polyurethanes, and polysulfides. The compatibility of elastomeric sealing compounds and seals with different fluids was determined and is discussed. Compatibility studies involved a silicone compound helicopter engine seal in eleven approved engine lubricants, two O- ring packings in Type I. Type III, JP-4, and JP-7 fuels, as well as Buna-n, ethylene propylene, and neoprene pump seals in a 55 MONO-ETHANOL-AMINE45 amon-isopropyl-amine decontaminant. A discussion of dynamic O- ring endurance testing is also included. Three additional areas of support are described in the third section. Included as a discussion of a program to increase the density of 3-D carboncarbon composites by hot pressing. The hot pressing conditions which were used are described. Additional development of a foam-in-place liner for helmets and the development of suitable photochromic compounds for camera filters are also discussed.

Subject Categories:

  • Adhesives, Seals and Binders
  • Laminates and Composite Materials
  • Properties of Metals and Alloys
  • Plastics

Distribution Statement:

APPROVED FOR PUBLIC RELEASE