Tunable transition temperature of shape memory polymers for multiple control of actuation
발표자
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초록
내용
Thermo-responsive shape memory polymers (SMPs) enable heat-triggered shape deformation under mechanical stress, temporal fixation below the transition temperature (Ttrans), and recovery of their permanent shape when the temperature is above Ttrans. The switchable and reconfigurable properties of SMPs are possible due to the stored energy and entropic retracting force of polymers composed of both hard and soft segments. In this study, we synthesized a dynamically cross-linked polyurethane for SMPs and controlled their Ttrans by adjusting the size of the hard segments and manipulating the molecular network structures. Our SMPs with a wide range of tunable Ttrans can be applied to the selective actuation and dexterous manipulation for soft robots.