Evaluation of New Resin Systems. Final Report September 20, 1982 - January 20, 1985

摘要

Four new acetylene terminated resins were evaluated as matrix materials for advanced aerospace composites. They were Hughes HR600P and three Air Force developed resins including BATQ-H(ATP), ATB and m-ATS. Given one pound of each of the materials, neat resin tensile properties were first studied to determine the optimum cure cycle and service temperature capability. Graphite prepreg was prepared using a single tow hot-melt prepregger. Small unidirectional laminates were then fabricated and baseline mechanical properties generated for varying temperature conditions for both dry and moisture conditioned states. The following tasks were accomplished: Differential scanning calorimetry, thermograviometric analysis and Rheometrics cure rheological anlaysis were performed on the four candidate resins. Neat resin microtensile specimens of HR600P, BATQ-H(ATP) and ATB were prepared and tested to determine the optimum postcure cycle for these materials. AS4/BATQ-H(ATP), AS4/ATB and AS4/m-ATS prepreg were prepared with a laboratory hot-melt prepregger. High quality laminates of AS4/ATB and AS4/m-ATS were prepared with the no bag autoclave technique. Void free laminates of AS4/BATQ-H(ATP) were prepared by press molding. Interlaminar shear, flexure, transverse flexure and G subscript 1c composite mechanical tests were performed. Physical property evaluations included prepreg resin content, cured laminate resin content, void evaluation and Tg (Rheometrics). Interlaminar shear and G subscript 1c delamination failure surfaces were analyzed by SEM. (Author)