高温柴油浸泡对丁腈橡胶硫化胶性能的影响  

Effect of High Temperature Diesel Oil Immersion on Properties of NBR Vulcanizates

作　　者：谢俊峰[1] 张冬娜 耿海龙[1] 蔡雪华 匡生平 丁楠 杜锋辉 XIE Junfeng;ZHANG Dongna;GENG Hailong;CAI Xuehua;KUANG Shengping;DING Nan;DU Fenghui(Oil and Gas Engineering Research Institute of PetroChina Tarim Oilfield Company,Korla 841000,China;State Key Laboratory of Performance and Structural Safety for Petroleum Tubular Goods and Equipment Materials,Xi’an 710077,China;CNPC Tubular Goods Research Institute,Xi’an 710077,China)

机构地区：[1]中国石油塔里木油田分公司油气工程研究院,新疆库尔勒841000 [2]石油管材及装备材料服役行为与结构安全国家重点实验室,陕西西安710077 [3]中国石油集团石油管工程技术研究院,陕西西安710077

出　　处：《橡胶工业》2022年第2期138-143,共6页China Rubber Industry

基　　金：国家科技重大专项(2016ZX05051003);中国石油天然气股份有限公司科技重大专项(2018E-1809)。

摘　　要：研究高温柴油浸泡对丁腈橡胶(NBR)硫化胶性能的影响。对在120℃0#柴油(简称柴油)中分别浸泡0,7,14和28 d的NBR硫化胶的质量变化率、体积变化率、密度、物理性能和玻璃化转变温度等进行测试。结果表明,高温柴油浸泡对NBR硫化胶性能的影响明显,其中NBR硫化胶的拉伸性能下降率较大,在柴油中浸泡28 d的NBR硫化胶的拉伸强度和拉断伸长率下降率均大于75%。浸泡初期(0~7 d),NBR硫化胶性能的主要影响因素为NBR硫化胶的溶胀行为;随着浸泡时间的延长(7~14 d),主要影响因素转变为NBR分子链进一步交联;随着浸泡时间继续延长(14~28 d),主要影响因素转变为NBR分子链断裂。The effects of high temperature diesel oil immersion on the properties of nitrile rubber(NBR)vulcanizates were studied.The mass change rates,volume change rates,densities,physical properties and glass transition temperatures of NBR vulcanizates that had been immersed in 120℃0#diesel oil(diesel oil for short)for 0,7,14 and 28 d were tested.The results showed that,high temperature diesel oil immersion had obvious effects on the properties of NBR vulcanizates.The tensile properties of NBR vulcanizates had the large decrease.The tensile strength and elongation at break of the NBR vulcanizates immersed in diesel oil for 28 d both decreased by more than 75%.In the early stage of immersing(0~7 d),the main change of the NBR vulcanizates was swelling.As the immersion time continued to prolong(7~14 d),the main change of the vulcanizates which affected the properties became the further cross-linking of the molecular chains.In the late stage(14~28 d),the dominant change of the vulcanizates was NBR molecular chain fracture.

关 键 词：丁腈橡胶 柴油 高温 浸泡 溶胀 交联 分子链断裂 拉伸性能 

分 类 号：TQ333.7[化学工程—橡胶工业] TQ330.7