DIFFUSION AS A PROBE TO ASSESS STRETCHING-INDUCED MORPHOLOGICAL-CHANGES IN POLYURETHANE
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Date
1993
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JOURNAL OF POLYMER SCIENCE PART B-POLYMER PHYSICS
Abstract
An analysis of the diffusion of toluene through polyurethane based on bis(p-cyclohexyl diisocyanate), poly(tetramethylene glycol) 1000, and 1,4-butane diol, subjected to varied degrees of elongation by stretching, is presented. The diffusion coefficient is increased by 60% in polymers drawn to 200% and above. Beyond 400% elongation, the diffusion coefficient attained a constant value. Associated changes are observed in the wide-angle x-rav diffraction pattern. These diffusion and x-ray changes are correlated with restructuring of the polymer induced by stretching. (C) 1993 John Wiley & Sons, Inc.
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Keywords
Polymer Science
Citation
31 ,9;1083-1087