压缩氟硅橡胶O形密封圈蠕变/老化行为研究

文章通过修正、扩充蠕变动力学模型,形成环境作用下活化粒子产生的物质宏观变化动力学模型,该模型涵盖了原有的蠕变动力学模型,且适用于描述复杂物理化学变化过程.应用该模型分析了压缩氟硅橡胶O形密封圈的蠕变/老化行为,取得很好效果,在常温到200°C的宽广温度范围内,准确描述了压缩氟硅橡胶O形密封圈的老化行为,同时在常温长时间外推验证中表现了良好的稳定性.在描述压缩氟硅橡胶O形密封圈的老化行为过程中,发现了两个新的现象:挥发作用影响压缩氟硅橡胶的蠕变/老化行为;压缩氟硅橡胶O形密封圈的蠕变/老化存在一个特征温度值(84.049°C),温度高于或低于该值时,压缩氟硅橡胶O形密封圈的老化/蠕变将加剧.

Creep/aging behavior study of compressed fluorinated silicone rubber O ring

Through modification and extension of the creep dynamic model, this article introduced a substance macro-change dynamic model produced by active particulate under environment effect, which contains the primary creep dynamic model, and is applicable in describing complex physic chemical change process. The model is well applied in analyzing the creep/aging behavior of compressed fluorinated silicone rubber O ring in a wide temperature range from room temperature to 200℃, in addition, it exhibited a nice stability in room temperature with long term extrapolated validation. Two new phenomenon were discovered in the process of describing the aging behavior of compressed fluorinated silicone rubber O ring： the volatilization effect affects the creep/aging behavior of compressed fluorinated silicone rubber; there is a characteristic temperature （84.049℃） for the compressed fluorinated silicone rubber O ring, the creep/aging will be enhanced either the temperature is higher or lower than this characteristic temperature.