首页> 外文期刊>Japanese Journal of Applied Physics. Part 1, Regular Papers, Brief Communications & Review Papers >Diffusion Process during Drying to Cause the Skin Formation in Polymer Solutions
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Diffusion Process during Drying to Cause the Skin Formation in Polymer Solutions

机译:干燥过程中的扩散过程导致聚合物溶液中形成皮肤

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摘要

We discuss the diffusion process of polymers in polymer solution undergoing evaporation of the solvent at the free surface, and obtain a diffusion-type equation with a moving boundary condition in one dimension. Taking into account the effect of gelation (or solidification) of the solution, we carry out numerical simulations of the one-dimensional model. Based on the numerical results, we present a detailed description of the condition related to the "skin" formation due to the surface gelation. Furthermore, we also show that the drying dynamics of polymer solutions is strongly related to a gelation, which causes a great increase of diffusion coefficient of polymers.
机译:我们讨论了聚合物在自由溶液中经历溶剂蒸发的聚合物溶液中的扩散过程,并获得了一维具有移动边界条件的扩散型方程。考虑到溶液的凝胶化(或固化)效果,我们对一维模型进行了数值模拟。基于数值结果,我们对由于表面胶凝而导致的与“皮肤”形成有关的状况进行了详细描述。此外,我们还表明,聚合物溶液的干燥动力学与凝胶化密切相关,而凝胶化导致聚合物扩散系数的极大提高。

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