NASA Logo

NTRS

NTRS - NASA Technical Reports Server

Back to Results
Isothermal aging effects on PMR-15 resinSpecimens of PMR-15 polyimide neat resin were aged in air at temperatures of 288, 316, and 343 C. Weight losses and dimensional changes were monitored during the course of the exposure time. Physical changes were also observed by optical and electron microscopy. It was found that polyimide polymer degradation occurred within a thin surface layer that developed and grew during thermal aging. The cores of the polymer specimens were protected from oxidative degradation, and they were relatively unchanged by the thermal treatment. Surface cracking was observed at 343 C and was probably due to an interaction between voids and stresses that developed in the surface layer.
Document ID
19930040511
Acquisition Source
Legacy CDMS
Document Type
Reprint (Version printed in journal)
Authors
Bowles, Kenneth J.
(NASA Lewis Research Center Cleveland, OH, United States)
Jayne, Douglas
(Case Western Reserve Univ. Cleveland, OH, United States)
Leonhardt, Todd A.
(Sverdrup Technology, Inc. Brook Park, OH, United States)
Date Acquired
August 16, 2013
Publication Date
January 1, 1993
Publication Information
Publication: SAMPE Quarterly
Volume: 24
Issue: 2
ISSN: 0036-0821
Subject Category
Nonmetallic Materials
Accession Number
93A24508
Funding Number(s)
PROJECT: RTOP 510-01-50
Distribution Limits
Public
Copyright
Other

Available Downloads

There are no available downloads for this record.
No Preview Available