Abstract
Shape memory polymers (SMPs) have unique properties and can be formed into arbitrary shapes using an FDM 3D printer. In this study, SMP lattice structures simulating foam materials were fabricated using an FDM 3D printer, with the goal of developing SMP lattice structures with recovery equivalent to that of foam materials. The main results obtained are summarized as follows. (1) Specimens at a nozzle temperature of 473 K were more susceptible to significant deformation by heat treatment than by shape recovery testing, and in addition, specimens prepared with an infill rate of 20% were deformed by more than 10% by heat treatment. (2) Increasing the nozzle temperature increases the crystallinity and reduces the deformation rate during heat treatment. However, since molding is insufficient and recovery is small, it is necessary to increase the crystallinity by another method.
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