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Development of autoclavable addition type polyimides
| Content Provider | NASA Technical Reports Server (NTRS) |
|---|---|
| Author | Jones, R. J. Vaughan, R. W. Orell, M. K. Sheppard, C. H. |
| Copyright Year | 1974 |
| Description | Two highly promising approaches to yield autoclavable addition-type polyimides were identified and evaluated in the program. Conditions were established for autoclave preparation of Hercules HMS graphite fiber reinforced composites in the temperature range of 473 K to 505 K under an applied pressure of 0.7 MN/m2 (100 psi) for time durations up to four hours. Upon oven postcure in air at 589 K, composite samples demonstrated high mechanical property retention at 561 K after isothermal aging in air for 1000 hours. Promise was shown for shorter term mechanical property retention at 589 K upon exposure in air at this temperature. |
| File Size | 4195879 |
| Page Count | 144 |
| File Format | |
| Alternate Webpage(s) | http://archive.org/details/NASA_NTRS_Archive_19740008135 |
| Archival Resource Key | ark:/13960/t9w13v113 |
| Language | English |
| Publisher Date | 1974-02-14 |
| Access Restriction | Open |
| Subject Keyword | Materials, Nonmetallic Composite Materials Polyimides Curing Aging Materials Mechanical Properties Autoclaving 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 | Technical Report |
