Accession Number : AD0884965

Title :   Development of High Temperature Polyimide Systems for High Performance Aircraft Structural Applications.

Descriptive Note : Summary technical rept. 15 May 70-15 Mar 71,

Corporate Author : NORTHROP CORP NEWBURY PARK CA VENTURA DIV

Personal Author(s) : Johnson, Robert D. ; Linebarier, Harvey L. ; Speakman, Lyman A. ; Reynolds, Donald T.

Report Date : 15 MAY 1971

Pagination or Media Count : 189

Abstract : The Fusible Film Process was demonstrated successfully in producing high quality boron-polyimide broadgoods, 24 inches wide by 88 inches long, both with and without a 104 glass scrim. The properties of the Skybond 704 film forming resin and the boron reinforcement were characterized. The scrim improved the handleability of the prepreg, reduced the width shrinkage to less than 1% IN OVEN STAGING AND INCREASED THE TRANSVERSE TENSILE AND FLEXURE PROPERTIES OF LAMINATES AT ROOM TEMPERATURE AND 550 F substantially. Excellent composition control was achieved in the prepreg and maintained in the laminates. Low void contents were achievedby oven staging the prepreg to a nominal 3 1/2 w/o volatiles prior to consolidation. Void contents of 2 % 1% were achieved in laminates made without scrim by consolidation at 450 F for 3 hours at 100 psig. (Author, modified-PL)

Descriptors :   (*REINFORCED PLASTICS, MANUFACTURING), (*LAMINATED PLASTICS, MANUFACTURING), (*BORON, REINFORCING MATERIALS), FIBERS, FILAMENT WOUND CONSTRUCTION, MECHANICAL PROPERTIES, TENSILE PROPERTIES, HEAT RESISTANT MATERIALS, BONDING, GLASS TEXTILES, AGING(MATERIALS).

Subject Categories : Refractory Fibers
      Laminates and Composite Materials
      Plastics

Distribution Statement : APPROVED FOR PUBLIC RELEASE