10MPa水素ガス中で曝露したエチレンプロピレンゴムの水素侵入特性とブリスタ破壊に及ぼす充てん剤の影響

概要

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EPDM composites with carbon black (CB50, CB25), with silica (SC60), and without fillers (NF) were exposed to 0.6 to 10 MPa hydrogen gases at 30℃, and the influence of fillers on hydrogen content and blister fracture of EPDM composites was investigated. The hydrogen contents of CB50, CB25, SC60, and NF were proportional to hydrogen pressures up to 10 MPa. It is confirmed that the behavior of their hydrogen contents follows Henry's law. The addition of the carbon black raised the hydrogen content of EPDM composites, while the addition of the silica did not raise that of EPDM composites. With respect to diffusivity, the carbon black lowered the diffusivity of EPDM composites, while the silica hardly influences that of EPDM composites. According to the observation of blister damages of CB50, CB25, SC60, and NF, the blister damage of SC60 is the slightest. It is considered to be due to lower hydrogen content and relatively better tensile properties compared with the others.
社団法人日本機械学会の論文
2008-07-25