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free volume considerations in thermoplastic and thermosetting resinsThe direct measurement of physical aging and of the volume changes which go on during the course of this aging is discussed. Data on PMMA showing its physical aging as measured by its stress relaxation response and the accompanying volume changes are presented. An indication of how one can measure the free volume both directly from the volume change itself and relatively directly via a new technique is given. The application of this new technique (electron spin resonance spectroscopy) to other polymer systems is demonstrated.
Document ID
19850004644
Document Type
Conference Paper
Authors
Landel, R. F.
(Jet Propulsion Lab., California Inst. of Tech. Pasadena, CA, United States)
Gupta, A.
(Jet Propulsion Lab., California Inst. of Tech. Pasadena, CA, United States)
Moacanin, J.
(Jet Propulsion Lab., California Inst. of Tech. Pasadena, CA, United States)
Hong, D.
(Jet Propulsion Lab., California Inst. of Tech. Pasadena, CA, United States)
Tsay, F. D.
(Jet Propulsion Lab., California Inst. of Tech. Pasadena, CA, United States)
Chen, S.
(Jet Propulsion Lab., California Inst. of Tech. Pasadena, CA, United States)
Chung, S.
(Jet Propulsion Lab., California Inst. of Tech. Pasadena, CA, United States)
Fedors, R. F.
(Jet Propulsion Lab., California Inst. of Tech. Pasadena, CA, United States)
Cigmecioglu, M.
(Jet Propulsion Lab., California Inst. of Tech. Pasadena, CA, United States)
Date Acquired
August 12, 2013
Publication Date
December 1, 1984
Publication Information
Publication: NASA. Langley Research Center Tough Composite Mater.
Subject Category
COMPOSITE MATERIALS
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.
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