Host: The Japan Society of Mechanical Engineers
Name : [in Japanese]
Date : September 15, 2021 - September 17, 2021
Shape memory polymers (SMPs) are one of the shape memory materials that have attracted attention in recent years, and can be formed into arbitrary shapes by FDM 3D printers. Since the printed SMP is formed while being strained, it deforms due to change in the elastic modulus by heating. The purpose of this study is to develop an actuator that operates with temperature change by combining SMPs with different glass transition temperatures (Tg) formed by an FDM 3D printer. The results obtained are summarized as follows. （1）The deformation behavior of an actuator that combines two SMPs with different Tg shows two-step behavior because the deformation occurs near each Tg. However, the way of deformation differs depending on the thickness of the printed SMP, and the actuator continues to deform even above the Tg region. （2） The printed SMP deforms little around Tg, and deforms significantly at temperatures above the Tg region, and stops deforming after reaching a certain temperature.
