高密度聚乙烯(HDPE)土工膜之抗有机溶剂浸透测试研究(英文)

本研究利用ASTM F739标准浸透测试方法及浸入试验,探讨三种厚度高密度聚乙烯(HDPE)土工膜,对于三氯乙烯、三氯甲烷、1,2–二氯乙烷及二氯甲烷有机溶剂之抗化学浸透性。研究发现:有机溶剂浸入HDPE为non-Fickian扩散模式,经由浸入试验之吸附数据,可得到有机溶剂在HDPE中的扩散系数及溶解度系数,ANOVA统计分析结果显示:扩散系数及溶解度系数在不同厚度HDPE中有显着差异(p<0.01)。同时,本研究利用浸入试验数据计算HDPE之浸透性,结果发现ASTM F739浸透方法与浸入实验所得到之稳定浸透速率有显着相关(r2=0.947,p<0.001)。因此,简单且快速之浸入试验可应用于评估有机溶剂在HDPE的稳定浸透速率。

Permeation of organic solvents through HDPE geomembrane using ASTM F739 and immersion methods

An evaluation of the effectiveness of a selected geomembrane as barrier was necessary.In this study,the chemical resistance of high density polyethylene(HDPE) geomembrane to four organic solvents was investigated using the standard ASTM F-739 and immersion methods.The diffusion of experimental organic solvents in HDPE was non-Fickian kinetic.From the sorption results of immersion test,diffusion coefficients were calculated using Fick’s equation.It was shown by the results of analysis of variance(ANOVA) that the diffusion and solubility coefficients were significantly different(p<0.05) for three thickness of HDPE samples.A good agreement(r2=0.947,p<0.001) of steady state permeation rates was found between ASTM F739 and immersion experiments.The immersion method could be a practical and inexpensive screening test to determine the chemical resistance of HDPE geomembrane.