Accession Number : ADA302420
Title : Quality Control Developments for Graphite/PMR-15 Polyimide Composites Materials.
Descriptive Note : Contract rept. Sep 78-Sep 79,
Corporate Author : BOEING AEROSPACE CO SEATTLE WA
Personal Author(s) : Sheppard, C. H. ; Hoggatt, J. T. ; Symonds, W. A.
PDF Url : ADA302420
Report Date : SEP 1979
Pagination or Media Count : 188
Abstract : Investigations were conducted to determine the cause and resolve the problem of the lot-to-lot and within lot variability of graphite/PMR-15 prepreg. The overall objective of the program was to obtain a manufacturing process and accept/reject criteria associated with the quality control of them monomer, resin and graphite prepreg preparation and storage. The program was divided into three technical phases; the first consisted of the evaluation of the chemical characterization data of tasks A-H; the second was directed at evaluating the processing conditions controlling the manufacture of PMR-15 resin and monomers; the third effort was directed at selecting the manufacturing conditions and demonstrating their reproducibility. Conclusions derived from the studies were that the new manufacturing procedures for the PMR-15 monomers and resin yielded prepreg from which excellent structural composites could be fabricated and that the prepreg could be manufactured reproducibly. jg p.118
Descriptors : *COMPOSITE MATERIALS, *GRAPHITE, *QUALITY CONTROL, *POLYIMIDE RESINS, MANUFACTURING, PROCESSING, MONOMERS, STORAGE, PREPREGS, REPRODUCIBILITY.
Subject Categories : Polymer Chemistry
Laminates and Composite Materials
Distribution Statement : APPROVED FOR PUBLIC RELEASE