低结合丙烯腈含量丁腈橡胶结合丙烯腈含量的调控  

Regulation of bound acrylonitrile content of nitrile rubber with low acrylonitrile content

作　　者：胡育林 王永峰 钟启林 赵志超 邵卫 HU Yu-lin;WANG Yong-feng;ZHONG Qi-lin;ZHAO Zhi-chao;SHAO Wei(Lanzhou Petrochemical Research Center,Petrochemical Research Institute,PetroChina/Synthetic Rubber Engineering Technology Research Center of Gansu/Petroleum and Chemical Industry Federation Synthetic Rubber Engineering Research Center of China,Lanzhou 730060,China)

机构地区：[1]中国石油石油化工研究院兰州化工研究中心/甘肃省合成橡胶工程技术研究中心/中国石油和化学工业联合会合成橡胶工程研究中心,兰州730060

出　　处：《合成橡胶工业》2023年第3期193-198,共6页China Synthetic Rubber Industry

基　　金：中国石油天然气股份有限公司科学研究与技术开发项目(21-LH-32-01)。

摘　　要：考察了聚合反应过程中NBR产品中结合丙烯腈含量的影响因素,主要包括单体竞聚率、单体转化率、单体浓度、聚合反应温度和压力,分析了产品的结构组成,并进行了聚合反应动力学探究和重复性试验。结果表明,在聚合反应温度为5.0℃、聚合压力为0.15~0.20 MPa条件下,采用多段补加丙烯腈的方式,同时将单体转化率控制在70%~75%,可得到丙烯腈结构单元分布均匀、结合丙烯腈质量分数为17%~19%的NBR产品,所用聚合配方和工艺具有良好的重复性。The factors affecting the bound acrylonitrile content of NBR product during the polyme-rization process were investigated,including monomer reactivity ratio,monomer conversion,monomer concentration,and polymerization temperature and pressure,the structural composition of the product was analyzed,and the polymerization reaction kinetics and repeatability experiment were carried out.The results showed that under the polymerization temperature of 5.0℃and polymerization pressure of 0.15-0.20 MPa,NBR products with uniform distribution of acrylonitrile structure units and mass fraction of bound acrylonitrile of 17%-19%could be obtained by using multi-stage addition of acrylonitrile and controlling the monomer conversion of 70%-75%.The polymerization formula and process had good repeatability.

关 键 词：丁腈橡胶 结合丙烯腈含量 单体竞聚率 单体转化率 单体配比 

分 类 号：TQ333.6[化学工程—橡胶工业]