ISSN:
0098-1273
Keywords:
Physics
;
Polymer and Materials Science
Source:
Wiley InterScience Backfile Collection 1832-2000
Topics:
Chemistry and Pharmacology
,
Physics
Notes:
Sorption of water in quenched amorphous poly(m-xylylene adipamide) has been studied at 50°C. The sorption process is nearly Fickian at low humidity. At relative humidities higher than about 58%, however, extremely abnormal behavior, such as a decrease in moisture uptake and a change in appearance from transparent to opaque, is found. From x-ray diffraction analysis, these changes can be attributed to crystallization. Thermal analysis of moistened samples confirmed that the crystallization is due to a drop in crystallization temperature caused by sorption of water. From the relation between the reduction in moisture uptake and the increase in volumetric crystallinity, it is proposed that the change in moisture uptake is caused by the exclusion of water from the crystalline phase.
Additional Material:
8 Ill.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1002/pol.1985.180230410
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