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Influence of excess diamine on properties of pmr polyimide resins and composites
| Content Provider | NASA Technical Reports Server (NTRS) |
|---|---|
| Author | Hurwitz, F. I. |
| Copyright Year | 1980 |
| Description | By varying the stoichiometry of the reactants in the preparation of PMR polyimide resin, changes occur in molecular weight distribution which influence the rheological properties and thus the processability of the resin, as well as the mechanical properties of the composite. The influence of 1-10 percent molar excess MDA on the molecular weight distribution and rheological properties of an imidized PMR system were exposed. 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. |
| File Size | 833925 |
| Page Count | 16 |
| File Format | |
| Alternate Webpage(s) | http://archive.org/details/NASA_NTRS_Archive_19800020932 |
| Archival Resource Key | ark:/13960/t5bc8sc30 |
| Language | English |
| Publisher Date | 1980-01-01 |
| Access Restriction | Open |
| Subject Keyword | Composite Materials Shear Properties Diamines Stoichiometry Carbon Fibers Rheology Mechanical Properties Glass Transition Temperature Thermal Stability Chromatography Molecular Weight Polyimide Resins Ntrs Nasa Technical Reports Server (ntrs) Nasa Technical Reports Server Aerodynamics Aircraft Aerospace Engineering Aerospace Aeronautic Space Science |
| Content Type | Text |
| Resource Type | Article |
