Accession Number : ADA305057

Title :   Rigid Closed-Cell Polyimide Foams For Aircraft Applications Foam-In-Place Technology.

Descriptive Note : Final rept. 1 Jul 82-1 Jul 84,

Corporate Author : CHEM-TRONICS INC EL CAJON CA

Personal Author(s) : Gagliani, J. ; Straub, P. ; Gagliani, J., Jr

PDF Url : ADA305057

Report Date : 01 JUL 1984

Pagination or Media Count : 48

Abstract : The following paragraphs contain a summary of the significant accomplishments generated during the course of the contract effort. Part 1, which covers the work dealing with testing of closed-cell foams, has resulted in the characterization of compositions which produce rigid foams for use in galley structure applications. The same effort has shown that the density, compressive strength and shear strength of the foams are directly related to the concentrations of the microballoons. The same properties are also directly related to the resin loading. Prototype samples of rigid closed-cell foams meeting the requirements of the program have been submitted to NASA, LB Johnson Space Center. Part 2, which vas undertaken to investigate apparatus to produce polyimide foams using foam-in-place techniques, has resulted in the selection of a spray gun apparatus capable to deliver a mixture of microballoons and resin binder on substrates which cures to yield a closed-cell foam. The adhesion of the foam on aluminum, titanium and steel substrates has been found to be excellent. The material meets the mechanical and thermal requirements of the program.

Descriptors :   *POLYIMIDE RESINS, *SYNTACTIC FOAMS, DENSITY, TENSILE STRENGTH, COMMERCIAL AIRCRAFT, ALUMINUM ALLOYS, POLYMERIZATION, STRUCTURAL ANALYSIS, ADHESION, SYNTHESIS(CHEMISTRY), FABRICATION, ANHYDRIDES, PROTOTYPES, SUBSTRATES, CHEMICAL COMPOSITION, THERMOCHEMISTRY, GLASS FIBERS, CURING, COMPRESSIVE STRENGTH, THERMAL DEGRADATION, CONCENTRATION(CHEMISTRY), TITANIUM ALLOYS, SHEAR STRENGTH, HONEYCOMB STRUCTURES, REINFORCEMENT(STRUCTURES), CARBON STEELS, SPRAY GUNS.

Subject Categories : Plastics

Distribution Statement : APPROVED FOR PUBLIC RELEASE