𝔖 Bobbio Scriptorium
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Water absorption and its effect on polyarylate

✍ Scribed by A. Golovoy; M. F. Cheung

Publisher
John Wiley and Sons
Year
1988
Tongue
English
Weight
488 KB
Volume
35
Category
Article
ISSN
0021-8995

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✦ Synopsis

Water absorption and its effect on the tensile and impact properties of polyarylate was studied by immersing polyarylate specimens in water baths, between 23 and 98Β°C. The diffusivity was calculated to be 11 X lo-' cm2/s at 23Β°C with an activation energy of 9.8 kcal/mole. The aromatic ester in polyarylate is hydrolyzed by water, which was found to cause a decrease in molecular weight and in mechanical properties. In the early stage, the reaction is zero-order and the activation energy of the hydrolytic embrittlement is 22 kcal/mole.

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