Abstract
In this study, we synthesized one type of biocompatible and biodegradable cross-linked star poly(e-caprolactone)–poly(ethylene glycol) (c-4sPCL–PEG) with an excellent temperature memory effect (TME) by photo-cross-linking of cinnamon group terminated four arms poly(e-caprolactone) (4sPCL–CA) and cinnamon group terminated poly(ethylene glycol) (PEG–CA) through the irradiation of 365 nm ultraviolet (UV) light. The results of differential scanning calorimetry (DSC) and dynamic mechanical analysis (DMA) demonstrated that the c-4sPCL–PEG networks possessed a broad transition temperature region from 20 to 55 °C, which including a wide high elasticity transition region and a melting transition region. A remembered temperature in this temperature range, which is close to body temperature, could be gained by adjusting the deformed temperature (Td). Moreover, the TME could be tuned by simply changing the molecular weight or the content of PCL segment. The mechanism of the TME was investigated in detail for the firs...
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