人為的に気泡破壊した硬質ポリウレタンフォームにおける圧縮弾性率

概要

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In this study, the compression modulus of some hard polyurethane foams before and after artificial destruction of cell was determined by the static compression tests and the dynamic viscoelastic measurements in compression mode. In the static compression tests, there are yield regions in foams before destruction of cell but no yield region in foams after destruction of cell. It was confirmed that cells are destroyed gradually over the yield region in foams before destruction of cell. In comparison of the static compression modulus by the static compression tests with the dynamic compression modulus by the dynamic viscoelastic measurements, the dynamic compression modulus is larger than the static compression modulus in foams before destruction of cell, but the dynamic compression modulus is smaller than the static compression modulus in foams after destruction of cell because of the non-linear phenomenon by buckling.
2001-06-01