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Effects of moisture absorption on fracture behaviors of acrylonitrile‐butadiene‐styrene resin
Author(s) -
Notomi Mitsuo,
Kishimoto Kikuo,
Shibuya Toshikazu,
Koizumi Takashi
Publication year - 1999
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(19990418)72:3<435::aid-app13>3.0.co;2-0
Subject(s) - materials science , composite material , acrylonitrile , acrylonitrile butadiene styrene , polystyrene , fracture toughness , moisture , absorption (acoustics) , toughness , copolymer , polymer
The effect of moisture absorption on fracture behaviors of acrylonitrile‐butadiene‐styrene (ABS) resin has been studied. For comparison, polystyrene (PS) and styrene‐acrylonitrile (SAN) resin have been tested. The fracture toughness of PS and SAN resins is determined by the ASTM standard test method for brittle polymers. The fracture toughness of ABS resin is obtained on the basis of the multiple specimens method. The fracture toughness of PS and SAN resin decreases with the increase in moisture absorption. On the other hand, the fracture toughness of ABS resin slightly decreases despite enormous moisture absorption. On the specimens absorbing moisture, a bright whitening region and a milky coloring region are distinguished in the stress‐whitening region, and the milky coloring region expands around the bright whitening region at the crack tip. From the transmission electron microscopic observation, the precraze formation can be recognized in this region. The crack‐tip shielding effect induced by this formation compensates the fracture toughness decrease due to moisture absorption. © 1999 John Wiley & Sons, Inc. J Appl Polym Sci 72: 435–442, 1999