Evaluation of EPDM Elastomeric Seals for Application in Polymer Electrolyte Membrane Fuel Cells

EPDM is a widely used elastomeric polymer for gaskets in PEMFCs. These gaskets play a critical role in maintaining the electrochemical stability of fuel cells and preventing gas leaks. Both chemical and mechanical degradation can occur in EPDM gaskets when exposed to mechanical stress and corrosive acidic conditions. The goal of this study was to enhance the durability of EPDM gaskets by modifying the curing formulation through variations in the proportion of dicumyl peroxide used. The present study investigates how transformations in the material affect its mechanical properties and chemical stability. Accelerated durability tests (ADT) were performed using ۱.۸ ppm hydrofluoric acid and ۱۲.۵ ppm sulfuric acid to simulate conditions that may be encountered in real-world applications. To analyze the chemical alterations and elemental release on the gasket surface, FTIR and AAS were employed. The addition of DCP (dicumyl peroxide) to the curing process improved both the chemical resistance and mechanical strength of EPDM. After ۸۰۰ hours of operation in the fuel cell, the optimized samples showed no changes in weight or hardness. These findings contribute to enhancing the durability of gaskets, ultimately improving the efficiency and longevity of PEM fuel cells.

کلیدواژه ها:

EPDM ، gasket ، Curing formulation ، Accelerated durability test ، Proton exchange membrane fuel cell