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The elastic and plastic mechanical responses of microcellular foams
Author(s) -
Ozkul M. H.,
Mark J. E.,
Aubert J. H.
Publication year - 1993
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.1993.070480502
Subject(s) - materials science , composite material , polyacrylonitrile , polystyrene , polyurethane , modulus , polymer , poisson's ratio , poisson distribution , statistics , mathematics
Microcellular foams were prepared by the thermally induced phase‐separation technique, which yields materials having very small cell dimensions (0.1–20μm). The polymers employed were isotactic polystyrene, polyacrylonitrile, poly(4‐methyl‐1‐pentene), polyurethane, and Lycra® and the resulting foams all had densities in the range 0.04–0.27 g cm −3 . Values of Young's modulus and the collapse stress for these foams were measured and compared with predictions for conventional foams containing defects. Also investigated were plastic deformations, some time‐dependent behavior, and Poisson's ratio. © 1993 John Wiley & Sons, Inc.