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Rapid quenching effects in glassy polymersUsing a specially constructed microbalance for hydrostatic weighing, density changes in PVC thin film due to rapid quenching through the glass transition temperature were observed. The more severe the quench, the greater the free volume content. Isobaric volume recovery of PVC was also studied by volume dilatometry. Both show aging of relaxing molecular rearrangements taking place as a linear function of logarithmic aging time at room temperature. Distribution of retardation times and Primak's distributed activation energy spectra were applied to the volume recovery data. The concomitant changes in mechanical properties of PVC after quenching were monitored by tensile creep stress-stran to failure rates. All reflect the presence of excess free volume content due to rapid quenching.
Document ID
19820019510
Acquisition Source
Legacy CDMS
Document Type
Other
Authors
Mcgarry, F. J.
(Massachusetts Inst. of Tech. Cambridge, MA, United States)
Date Acquired
August 10, 2013
Publication Date
June 28, 1982
Publication Information
Publication: The Mater. Process. Res. Base of the Mater. Process. Center
Subject Category
Nonmetallic Materials
Accession Number
82N27386
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.

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