Influence of excess diamine on properties of PMR polyimide resins and compositesThis preliminary study explores the influence of 1-10 percent molar excess MDA on the molecular weight distribution and rheological properties of an imidized PMR system. Molecular weight distribution is characterized by gel permeation chromatography of the imidized molding compound; shear viscosity is related to changes in average molecular weight. The thermo-oxidative stability at 600 F glass transition temperature, flexural and interlaminar shear properties of PMR polyimide/Celion 6000 graphite fiber composites are compared as a function of the percent excess MDA in the monomer reactant mixture.
Document ID
19810059231
Acquisition Source
Legacy CDMS
Document Type
Conference Proceedings
Authors
Hurwitz, F. I. (NASA Lewis Research Center Cleveland, OH, United States)
Date Acquired
August 11, 2013
Publication Date
January 1, 1980
Subject Category
Composite Materials
Meeting Information
Meeting: National Technical Conference on Materials 1980