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Dielectric determination of the glass transition temperature (T sub g)The objective is to determine the glass transition temperature of a polymer using a dielectric dissipation technique. A peak in the dissipation factor versus temperature curve is expected near the glass transition temperature T sub g. It should be noted that the glass transition is gradual rather than abrupt, so that the glass transition temperature T sub g is not clearly identifiable. In this case, the glass transition temperature is defined to be the temperature at the intersection point of the tangent lines to the dissipation factor versus temperature curve above and below the transition region, as illustrated.
Document ID
19900015036
Acquisition Source
Legacy CDMS
Document Type
Conference Paper
Authors
Ries, Heidi R. (Norfolk State Univ. VA, United States)
Date Acquired
September 6, 2013
Publication Date
May 1, 1990
Publication Information
Publication: NASA, Langley Research Center, National Educators' Workshop: Update 1989 Standard Experiments in Engineering Materials Science and Technology
Subject Category
Nonmetallic Materials
Accession Number
90N24352
Funding Number(s)
CONTRACT_GRANT: NCC1-90
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.

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