ポリウレタン系形状記憶ポリマーの繰返し変形特性

概要

論文の詳細を見る
The cyclic deformation properties of shape memory polymer of the polyurethane series were investigated experimentally. The main results are summarized as follows. ( 1 ) As thermal cycles progress, the residual strain increases, the recovery strain decreases and the deformation resistance increases. ( 2 ) The recovery strain in the heating proccess under no-stress conditions appears above the glass transition temperature. The temperature at which recovery of strain starts rises with cyclic deformation. ( 3 ) The recovery strain at high temperature increases significantly during the first 10 min when the temperature is kept constant, but varies slightly after that. ( 4 ) The characteristic values in ( 1 ) - ( 3 ) vary significantly in the early cycles, but vary slightly after these cycles. ( 5 ) The strain obtained at low temperature following the predeformation at high temperature does not vary under thermomechanical cycling, which demonstrates the stable shape fixity of the material for cyclic deformation.
社団法人日本機械学会の論文
1992-10-25