Taking fluorine rubber and Buna-N rubber seal for examples, and according to GB 7512-2006 Cylinders Valve of Liquefied Petroleum Gas and an enterprise standard Dimethyl Ether Rubber Seal Material, the corrosion-resisting test, the ageing resistance test and the low temperature resistance test were implemented in LPGDME with different proportioning. The test results indicate that both volume change rate and mass change rate of two samples can change with the ratio of dimethyl ether, but the mass change rate of Buna-N rubber can change obviously with the ratio change of combined fuel and the results of ageing resistance test and low temperature resistance test are acceptable. Under the same ratio of reagents, the corrosion resistance property of fluorine rubber outperforms that of common Buna-N Rubber, and the safety property of fluorine rubber shim can meet the standard requirements, and it' s applicable to LPGDME cylinder.%以氟橡胶和普通丁腈橡胶两种橡胶密封圈为样本,分别参照GB 7512-2006《液化石油气瓶阀》与某企业的《二甲醚类橡胶密封材料》规定,在不同配比下的液化石油气二甲醚混合燃料环境中进行橡胶密封圈耐腐蚀性、耐老化和耐低温试验.试验数据显示两种样本的体积变化率与质量变化率都随二甲醚配比的变化而变化,但普通丁腈橡胶的质量变化率随混合燃料配比的变化更明显;耐老化及耐低温试验均合格.相同配比的试剂下,氟橡胶的耐腐蚀性能优于普通丁腈橡胶,因此,氟橡胶安全性能试验符合标准规定,可适用于储存液化石油气二甲醚混合燃料的钢瓶瓶阀的密封材料.
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