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Volume phase transition of a polymer gel induced by phase separation of mixed solvents of water and 2-butoxyethanol

机译:通过水和2-丁氧基乙醇的混合溶剂相分离诱导的聚合物凝胶的体积相转变

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摘要

The occurrence of the volume phase transition triggered by the phase separation of mixed solvents is investigated using polyacrylamide gels in mixtures of water and 2-butoxyethanol. When the water content of the mixtures is lower than that of the critical composition, the temperature-dependent swelling curves show a steep change around the phase separation temperatures but remain continuous, although the solvent inside the gel undergoes a discontinuous composition change. This continuous change originates from the critical concentration fluctuation below the spinodal temperature. Hysteresis-like behavior is also observed for the heating and cooling curves. (c) 2018 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2018, 135, 46366.
机译:通过在水和2-丁氧基乙醇的混合物中使用聚丙烯酰胺凝胶来研究通过混合溶剂的相分离触发的体积相转变的发生。 当混合物的水含量低于临界组合物的水含量时,温度依赖性溶胀曲线显示相分离温度的陡峭变化,但保持连续,尽管凝胶内的溶剂经历不连续的组合物变化。 这种连续变化来自纺丝镜温度以下的临界浓度波动。 还观察到滞后的行为用于加热和冷却曲线。 (c)2018 Wiley期刊,Inc.J.Phill。 聚合物。 SCI。 2018,135,46366。

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