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Water absorption and its effect on polyarylate
Author(s) -
Golovoy A.,
Cheung M. F.
Publication year - 1988
Publication title -
journal of applied polymer science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.575
H-Index - 166
eISSN - 1097-4628
pISSN - 0021-8995
DOI - 10.1002/app.1988.070350609
Subject(s) - absorption of water , activation energy , hydrolysis , thermal diffusivity , embrittlement , ultimate tensile strength , absorption (acoustics) , materials science , mole , polymer chemistry , chemistry , organic chemistry , composite material , physics , quantum mechanics
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 98°C. The diffusivity was calculated to be 11 × 10 −9 cm 2 /s at 23°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.