古马隆树脂对核电站用隔膜EPDM材料性能的影响

Effect of Coumarone Resin on Properties of Diaphragm EPDM Materials for Nuclear Power Plant

文章探究古马隆树脂(CR)对核电站用隔膜三元乙丙橡胶(EPDM)材料性能的改善效果。采用拉伸试验、旋转流变仪、扫描电镜(SEM)、热重分析(TG)等方法,分析CR含量对EPDM性能的影响及其机理。结果表明:CR的引入对EPDM的性能有显著影响,焦烧时间(T_(10))、正硫化时间(T_(90))和最低转矩(ML)值明显降低,而最高和最低转矩的差值(ΔM)和最高转矩(MH)的值增加。当CR含量≥6份时,试样的断裂伸长率、撕裂性能、疲劳性能和热性能均得到改善,但辐照后试样的拉伸强度降低。随着CR含量的增加,硬度逐渐降低,密度几乎不变。研究证明,CR的引入可以显著改善EPDM材料的加工性能、熔融稳定性、力学性能,这对于核电站用隔膜材料的开发和应用具有实际应用价值。

The improvement effect of coumarone resin(CR)on the properties of ethylene propylene diene monomer(EPDM)material for a nuclear power plant was investigated.Various methods,including tensile tests,rotational rheometer analysis,scanning electron microscopy(SEM),and thermogravimetric analysis(TG),were employed to analyze the influence of CR content on EPDM properties and its underlying mechanisms.The results show that the introduction of CR significantly affects EPDM properties,with a noticeable decrease in the scorch time(T_(10)),positive curing time(T_(90)),and minimum torque(ML),while the difference between the maximum and minimum torques(ΔM)and the highest torque(MH)increase.When the CR content is≥6 phr,the elongation at break,tear property,fatigue property and thermal property of the samples are improved,but the tensile strength of the samples decreases after irradiation.With the increase of CR content,the hardness gradually decreases and the density remains almost unchanged.The study demonstrates that the incorporation of CR can significantly enhance the processing performance,melt stability,and mechanical properties of EPDM materials,providing practical value for the development and application of diaphragm materials for nuclear power plants.