形状記憶ポリマーシートの収縮に伴う面外変形の誘起

抄録

Active materials such as a shape polymer can respond to an external stimulus and cause a sudden large deformation. For applications to the fabrication process of printed electronics, it is attractive to realize a transformation to a three-dimensional shape without direct manipulation by using active materials. In order to predict and control the deformation from the two-dimensional shape to the three-dimensional shape, it is necessary to clarify the deformation process. In this study, circular sheets made from an equi-biaxially pre-stretched shape memory polymer is used as an active material. The sheet is partially printed with black colouration where generates heat when irradiated by infrared light to impose local heating. The temperature field and deformation of the sheet were experimentally characterized by an infrared camera and a CCD camera. We found the condition whether the out-of-plane deformation can occur or not depending on the shrinkage size with a fixed diameter of the sheet. Also, we observed the curvature develops as the shrinkage size increases.