Accession Number : ADA306200

Title :   Evaluation of Adhesives for Sealing Metallic and Plastic Films for Use at Liquid-Hydrogen Temperatures,

Corporate Author : NATIONAL AERONAUTICS AND SPACE ADMINISTRATION WASHINGTON DC

Personal Author(s) : Hacker, Paul T. ; DeVos, Francis J. ; Stutesman, Harley L.

PDF Url : ADA306200

Report Date : FEB 1965

Pagination or Media Count : 14

Abstract : An experimental investigation was conducted to evaluate the ability of 15 different adhesives to provide a hermetic seal in lap joints between thin metallic foils and plastic films in the presence of gaseous and liquid hydrogen. The lap joints were tested in a manner that provided a pressure difference of 20 pounds per square inch through the adhesive bond line but did not subject the joint to any mechanical stresses or loads. Each adhesive was tested at room, liquid-nitrogen (-32O F), and liquid-hydrogen (-423 F) temperatures. The adhesives tested are commercially available and included epoxy- polyamines, nylon-filled epoxies, urethanes, polyesters, and rubber based adhesives. In general, the most satisfactory adhesives system for sealing aluminum to aluminum, Mylar to Mylar, and Mylar to aluminum at cryogenic temperatures are the epoxies. (MM)

Descriptors :   *SOLID PROPELLANT ROCKET ENGINES, *ADHESIVES, *PROPELLANT TANKS, LOW TEMPERATURE, POLYMERS, METAL FILMS, AMINES, ALUMINUM, BONDED JOINTS, POLYMERIC FILMS, FOILS(MATERIALS), EPOXY COMPOUNDS, LIQUID HYDROGEN, ROCKET ENGINE CASES, PLASTICS, CRYOGENICS, SEALING COMPOUNDS, ADHESIVE BONDING, ROCKET PROPELLANTS, HERMETIC SEALS, URETHANES, BURSTING STRENGTH, RUBBER ADHESIVES, POLYETHYLENE TEREPHTHALATE.

Subject Categories : Adhesives, Seals and Binders
      Solid Propellant Rocket Engines

Distribution Statement : APPROVED FOR PUBLIC RELEASE