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Solubility Measurements of Blowing Agents in Polyethylene Terephthalate

机译:发泡剂在聚对苯二甲酸乙二醇酯中的溶解度测量

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摘要

The solubility of various blowing agents such as CO_2, N_2, Ar, pentane, isopentane, cyclopentane, butane, hexane, heptane, 1,1-difluoroethane, CO_2/N_2, and CO_2/pentane in PET was studied using closed pressure vessels. The experiments were performed at 50-200℃ and pressures up to 14 Mpa. The solubilities were correlated using the Flory-Huggins equation for HFC and hydrocarbons, and via Henry's law for supercritical gases. In order of decreasing solubility, the blowing agents rank 1,1-difluoroethane > hydrocarbons > inert gases. Since the Arrhenius type behavior seemed to be able to describe the temperature dependency of the H values, the solubilities at foaming temperatures can be predicted.
机译:使用密闭压力容器研究了各种发泡剂(如CO_2,N_2,Ar,戊烷,异戊烷,环戊烷,丁烷,己烷,庚烷,1,1-二氟乙烷,CO_2 / N_2和CO_2 /戊烷)在PET中的溶解度。实验是在50-200℃,压力高达14 Mpa的条件下进行的。使用Flory-Huggins方程对HFC和碳氢化合物进行溶解度关联,并针对超临界气体通过亨利定律进行关联。为了降低溶解度,发泡剂将1,1-二氟乙烷>烃>惰性气体排列。由于Arrhenius型行为似乎能够描述H值的温度依赖性,因此可以预测发泡温度下的溶解度。

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