Abstract To find suitable sealing material with low permeability against hydrogen, the elaborated evaluation techniques for hydrogen transport properties are necessary. We developed two techniques determining the permeability of hydrogen including software for diffusion behavior analysis. The techniques contain gas chromatography and volumetric collection of hydrogen gas. By measuring the hydrogen released from polymer samples with respect to the elapsed time after being decompressed from the high pressure, total amount of adsorption and diffusivity (D) of hydrogen are evaluated with self-developed program of Fick’s diffusion equation specified to a sample shape. The solubility (S) and permeability (P) of the polymers are determined through Henry’s law and a relation of P = S D , respectively. Developed techniques were applied to three kinds of spherical-shaped sealing rubbers, NBR, EPDM, and FKM. The D, S and P have been measured as function of pressure. The permeability obtained by both methods are discussed with Comsol simulation.

中文翻译：

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橡胶聚合物中氢渗透特性的评价

摘要 为了找到合适的低透氢密封材料，需要详细的氢传输性能评估技术。我们开发了两种确定氢渗透率的技术，包括用于扩散行为分析的软件。这些技术包括气相色谱法和氢气的体积收集。通过测量聚合物样品释放的氢与从高压解压后经过的时间相比，氢的总吸附量和扩散率 (D) 可通过 Fick 扩散方程的自行开发程序来评估，该程序指定给样品形状。聚合物的溶解度 (S) 和渗透率 (P) 分别通过亨利定律和 P = SD 的关系确定。开发的技术应用于三种球形密封橡胶，NBR、EPDM 和 FKM。D、S 和 P 已作为压力的函数进行测量。Comsol 模拟讨论了通过这两种方法获得的渗透率。