| 초록 |
Shape memory polymers (SMPs) are technologically important smart materials that can remember their permanent shape upon heating. In traditional shape memory polymers, the temporarily fixed shape is obtained by applying deformation force onto a sample in a heated state and a subsequent quenching. Recently, SMPs which does not require the temperature programming have been paid attentions, in which temporarily fixed shape can be obtained by deformation without heating. In this study, we observed that PLA toughened by ethylene-butylacrylate–glycidyl methacrylate copolymer (E-BA-GMA) underwent a permanent plastic deformation when it is stretched to 100% at room temperature, and the plastically deformed shape was recovered to its original dimension upon heating at 80℃ within 10 seconds. The morphology, thermal and mechanical properties of the toughened PLA were characterized to understand the unique shape memory effects. |
