低温で負荷を受けるポリウレタン系形状記憶ポリマーの繰返し変形

概要

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The deformation properties of the shape memory polymer of the polyurethane series were investigated through thermomechanical cycling with loading at low temperature and heating with no load. The main results are summarized as follows. ( 1 ) The stress-strain curves vary significantly in the early cycles. In particular, the increment in the residual strain is large. ( 2 ) The recovery strain obtained by unloading is about 10-20% of the maximum strain. In order to obtain a certain amount of deformation with forming at low temperature, it is necessary to estimate an accurate amount of spring back. ( 3 ) The recovery strain due to heating with no load subsequent to loading at low temperature appears at a temperature near the midpoint glass transition temperature. ( 4 ) The shape recoverability and the shape fixity with loading at high temperature are better than those with loading at low temperature.
社団法人日本機械学会の論文
1992-10-25