摘要
热老化稳定性是EPDM橡胶的标志,也是胶带胶管,密封条,屋面膜及其它橡胶制品应用的要求。本文通过测试EPDM硫化橡胶分别在100℃、120℃、130℃和150℃的温度下老化后的拉伸性能,推导出了一种用于预测产品实际应用温度下的使用寿命模型。试验结果表明:过氧化物硫化EPDM橡胶相对硫磺硫试样强度较高,断裂伸长率较低。老化后,拉伸强度先开始表现出急剧下降,随着老化时间的延长,降低程度逐渐平缓,断裂伸长率表现出较高且持续的损失,而且老化温度越高,强度和断裂延伸率损失程度越严重,两种硫化胶试样表现出相同的物理性能损失模式。根据建立的老化模型,推断某产品如果采用硫磺硫化橡胶可以使用17年,采用过氧化物硫化橡胶可以使用44年,为产品的实际应用提供了有力的证据。
Heat aging stability is a hallmark of EPDM rubber and a requirement for the application of rubber hoses,sealing strips,roofing membranes,and other rubber products.This paper derives a model for predicting the service life of products at actual application temperatures by testing the tensile properties of EPDM vulcanized rubber after aging at temperatures of 100℃,120℃,130℃,and 150℃.The test results indicate that peroxide-vulcanized EPDM rubber exhibits higher strength and lower elongation at break compared to sulfur-vulcanized samples.After aging,the tensile strength initially shows a sharp decrease,and as the aging time increases,the decrease gradually flattens out.The elongation at break shows a higher and continuous loss,and the higher the aging temperature,the more severe the loss of strength and elongation at break.Both vulcanized rubber samples exhibit the same pattern of physical property loss.Based on the established aging model,it is inferred that a product using sulfur-vulcanized rubber can last for 17 years,while one using peroxide-vulcanized rubber can last for 44 years,providing strong evidence for the practical application of the product.
作者
姜华波
曹翠玲
Jiang Huabo;Cao Cuiling(Zhuoyetai Seiko Co.LTD.,Qingdao 266199,Shandong,China)
出处
《橡塑技术与装备》
2026年第1期52-57,共6页
China Rubber/Plastics Technology and Equipment
