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Effect of water on viscoelastic properties of oriental lacquer film
Author(s) -
Ogawa Toshio,
Inoue Akira,
Osawa Satoshi
Publication year - 1998
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/(sici)1097-4628(19980711)69:2<315::aid-app12>3.0.co;2-v
Subject(s) - lacquer , viscoelasticity , materials science , composite material , polymer science , coating
We noticed the Urushi film, by which oriental lacquer wares are prepared. The effect of water on mechanical properties of oriental lacquer film was investigated in a tensile test and a stress relaxation test. These tests were conducted under the various degrees of humidity. Oriental lacquer film had a tendency to became brittle under dry condition and to toughen under wet conditions. On the other hand, the film becomes sticky and soft under high humidity or in water. The relaxation modulus for this film was determined under the various degrees of humidity. This behavior changed largely depending upon humidity. Master curves on the result of stress relaxation test were prepared by applying the rule of time–temperature superposition. The temperature dependence of shift factor on the various degrees of humidity could be represented by the Williams–Landel–Ferry equation by changing two parameters, C 1 and C 2 . © 1998 John Wiley & Sons, Inc. J Appl Polym Sci 69: 315–321, 1998