108 ポリウレタン系形状記憶ポリマーの形状固定・回復と二次賦形特性(知的材料・構造システム)

概要

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By applying strain at high temperature to polyurethane-shape memory polymer film, followed by holding the strain under various thermomechanical conditions, the behavior of strain recovery by heating after these processes was investigated. In the experiments, the influence of the strain-holding conditions on shape recovery and secondary-shape forming was investigated. The results obtained are summarized as follows. (1) If strain is held at high temperature for short time, irrecoverable strain starts to appear at the holding time t_h=0.5h and strain is not recovered at all at t_h=8h in the case of holding temperature T_h=T_g+20K. In the case of T_h=T_g+10K, irrecoverable strain appears in proportion to initial strain and the rate of secondary-shape forming S is 42% at t_h=8h.
社団法人日本機械学会の論文
2006-11-25