Scholarlink

<p>The illegal blending of dimethyl ether (DME) into liquefied petroleum gas (LPG) frequently causes gas leakages and explosions due to the corrosion of nitrile rubber (NBR) O-rings in gas stoves. To investigate the corrosion effect of DME on rubber sealing materials, NBR specimens were immersed in DME-butane mixtures for macroscopic physical properties, microstructure, and chemical analyses. The results show that liquefied DME causes significant mass loss (up to 17.86%) and volume shrinkage (up to 35.19%), alongside drastic reductions in hardness and tensile strength. Scanning electron microscopy (SEM) revealed that DME induced the formation of micropores, pits, and microcracks on the NBR surface. Fourier transform infrared spectroscopy (FTIR) confirmed that DME extracts ester-based plasticizers, but without finding new functional groups, indicating that the NBR macromolecular backbone remains intact. Based on the mass loss data of NBR in liquefied and gaseous DME environments, a model for the service life evaluation of DME-affected rubber O-ring was constructed using a 10% mass loss rate as the failure criterion. The model predicts a sharp lifespan reduction from 7.8 to 1.4&#xa0;days in liquefied DME environments, and from 1053.3 to 558.3&#xa0;days in gaseous DME exposure. These findings are significant for revealing the impact of DME-blended LPG on the safety of gas stoves.</p> Graphical Abstract <p></p>

错误：搜索内容不能为空，请输入英文关键词
错误：关键词超出字数限制，请精简
高级检索

The Corrosion Effect of Dimethyl Ether on Rubber Sealing Material of Gas Stoves: A Preliminary Model for the Service Life Evaluation of Rubber O-ring

  • 期刊论文

  • 发表日期：

    2026年4月27日

查看全文
  • Shanjie Zhao,
  • Xiaofeng Yang,
  • Qi Zhao,
  • Zhouting Wang,
  • Jia Qiu,
  • Kan Jin

摘要

The illegal blending of dimethyl ether (DME) into liquefied petroleum gas (LPG) frequently causes gas leakages and explosions due to the corrosion of nitrile rubber (NBR) O-rings in gas stoves. To investigate the corrosion effect of DME on rubber sealing materials, NBR specimens were immersed in DME-butane mixtures for macroscopic physical properties, microstructure, and chemical analyses. The results show that liquefied DME causes significant mass loss (up to 17.86%) and volume shrinkage (up to 35.19%), alongside drastic reductions in hardness and tensile strength. Scanning electron microscopy (SEM) revealed that DME induced the formation of micropores, pits, and microcracks on the NBR surface. Fourier transform infrared spectroscopy (FTIR) confirmed that DME extracts ester-based plasticizers, but without finding new functional groups, indicating that the NBR macromolecular backbone remains intact. Based on the mass loss data of NBR in liquefied and gaseous DME environments, a model for the service life evaluation of DME-affected rubber O-ring was constructed using a 10% mass loss rate as the failure criterion. The model predicts a sharp lifespan reduction from 7.8 to 1.4 days in liquefied DME environments, and from 1053.3 to 558.3 days in gaseous DME exposure. These findings are significant for revealing the impact of DME-blended LPG on the safety of gas stoves.

Graphical Abstract