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The conformation change of poly(N-isopropylacrylamide) (PNIPAAm) hydrogel as a function of temperature is studied both experimentally and by molecular simulation. The experiments show a Θ-temperature of approximately 305K and a width of the transition region of approximately 20K, independent of the amount of cross-linker. The conformation change of the hydrogel is caused by a conformation change of...
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