Development of High Temperature Polyimide Systems for High Performance Aircraft Structural Applications

摘要

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)