Accession Number : ADA303677

Title :   Investigations for Improved Tack PMR Polyimide.

Descriptive Note : Final rept. 27 Jun 79-1 May 81,

Corporate Author : TRW DEFENSE SYSTEMS GROUP REDONDO BEACH CA

Personal Author(s) : Buyny, R. A.

PDF Url : ADA303677

Report Date : OCT 1981

Pagination or Media Count : 117

Abstract : One reactive diluent and several high boiling solvents were investigated for providing long shelf life tack and drape to PMR-l5 polyimide prepreg. A promising approach appeared to be the addition of diethylene glycol dimethyl ether (diglyme) to methanol. However, near the conclusion of this investigation, it was learned that the auto-ignition temperature of diglyme is 461 deg K (370 deg F). Consequently, because of the low auto-ignition temperature it is recommended that diglyme should not be used as a tackifier for PMR-l5 prepregs. (MM)

Descriptors :   *LAMINATES, *SOLVENTS, *PREPREGS, *POLYIMIDE PLASTICS, *DILUENTS, COMPRESSION, LOW TEMPERATURE, AGING(MATERIALS), METHYL RADICALS, COATINGS, METHANOLS, MELTING, ETHERS, ULTRASONIC TESTS, AUTOIGNITION, UNIDIRECTIONAL, BOILING, GLYCOLS, MOLDING TECHNIQUES, AUTOCLAVES, DIOXANES.

Subject Categories : Laminates and Composite Materials
      Plastics
      Solvents, Cleaners, and Abrasives

Distribution Statement : APPROVED FOR PUBLIC RELEASE