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Free volume model for molecular weights of polymersA free volume model has been developed for determining molecular weights of linear polymers. It is based on the size of free volume cells in two geometries of poly(arylene ether ketone)s. Free volume cell sizes in test samples were measured using positron lifetime spectroscopy. The molecular weights computed from free volume cell sizes are in good agreement with the values measured by gel permeation chromatography, with a low angle laser light scattering photometer as the detector. The model has been further tested on two atactic polystyrene samples, where it predicted the ratio of their molecular weights with reasonable accuracy.
Document ID
19930034724
Acquisition Source
Legacy CDMS
Document Type
Reprint (Version printed in journal)
External Source(s)
doi:10.1016/0168-583X(92)95221-C
Authors
Singh, J. J. (NASA Langley Research Center Hampton, VA, United States)
Eftekhari, A. (Hampton Univ. VA, United States)
Date Acquired
August 15, 2013
Publication Date
January 1, 1992
Publication Information
Publication: Nuclear Instruments and Methods in Physics Research, Section B - Beam Interactions with Materials and Atoms
ISSN: 0168-583X
Subject Category
Nonmetallic Materials
Accession Number
93A18721
Distribution Limits
Public
Copyright
Other

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