成果報告書詳細
管理番号20140000000121
タイトル*平成25年度中間年報 水素利用技術研究開発事業 燃料電池自動車及び水素ステーション用低コスト機器・システム等に関する研究開発 水素ステーションの高圧水素用ホースとシールシステムに関する研究開発(5)
公開日2015/4/25
報告書年度2013 - 2013
委託先名一般財団法人化学物質評価研究機構
プロジェクト番号P13002
部署名新エネルギー部
和文要約
英文要約Title: Research and Development of Technology for Hydrogen Utilization/ Research and Development of Low-cost Equipment and System for Fuel Cell Vehicles and Hydrogen Stations/ Research and Development of Low-cost Equipment, System and their Materials for Hydrogen Stations/ Research and Development of High-pressure Hydrogen Hose and Sealing System for Hydrogen Stations (FY2013–FY2015) FY2013 Annual Report

Influence of high-pressure hydrogen exposure on physical properties and chemical structure of ethylene-propylene elastomer (EPDM), of which plenty data has been acquired by previous work, has been investigated. The hydrogen exposure of specimens was carried out at 90 MPa pressure for 24 hours in autoclave. After 24 hours the autoclave was open to atmospheric pressure. The frequency of the hydrogen exposure was 1 or 5. The resulting specimens were used for follow evaluation. To understand how physical properties of the specimens change after the high-pressure hydrogen exposure, tensile property, hardness, rebound resilience, low temperature property, permeability to gas, and dynamic viscoelasticity were measured. In addition, composition, glass transition temperature, and cross-linking density of specimens before and after the exposure were measured, and changes of chemical structure were investigated by Fourier transform–infrared spectroscopy, and solid-state and swollen-state nuclear magnetic resonance spectroscopy.
The main content of obtained from the research in FY2013 is as follows:
1) Blisters were observed in specimens after the exposure.
2) It was considered that changes of mechanical properties such as tensile strength and hardness mainly result from influence of inner destruction.
3) Superior low temperature properties of EPDM were maintained.
4) No changes of chemical structure were detected after 5 times hydrogen exposure. However, taking into account the fact that high-pressure hydrogen exposure causes inner destruction of specimens, damages of the molecular chains, such as change of cross-linking density, may detect in specimen after larger exposure times than 5 times.
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