天然橡胶环氧化改性工艺研究  

Study on Process for Epoxidation Modification of NR

作　　者：刘建业 杜晓威 王朋园 牛春梅[1] LIU Jianye;DU Xiaowei;WANG Pengyuan;NIU Chunmei(Hebei University of Science and Technology,Shijiazhuang 050018,China)

机构地区：[1]河北科技大学材料科学与工程学院

出　　处：《橡胶工业》2020年第1期61-64,共4页China Rubber Industry

摘　　要：研究中性环境制备环氧化天然橡胶(ENR)的工艺。本试验确定的天然橡胶(NR)环氧化改性体系反应条件如下:乳化剂异构十三碳醇聚氧乙烯醚1308,体系的NR固形物质量分数0.25~0.28,NR/丙酮/过氧硫酸氢钾的物质的量比1∶0.435∶0.190,温度4~8℃。在此反应条件下可制得环氧度为28%、反应效率为73.68%的ENR。此方法制得的ENR性能稳定,副产物少。The process of preparing epoxidized natural rubber(ENR) in a neutral environment was studied. The reaction conditions of the natural rubber(NR) epoxidation modification system were determined as follows:emulsifier isomeric tridecyl alcohol polyoxyethylene ether1308,NR solid content 0. 25~0. 28,molar ratio of NR/acetone/potassium hydrogen sulfate complex salt 1 ∶ 0. 435 ∶ 0. 190,and reaction temperature 4 ~ 8 ℃. Under those reaction conditions,the ENR with epoxidation of 28% and a reaction efficiency of 73. 68% were obtained. The ENR produced by this method had stable performance and few byproducts.

关 键 词：天然橡胶 天然胶乳 环氧化 乳化剂 中和剂 缓冲剂 温度 催化剂 环氧度 反应效率 

分 类 号：TQ331.2[化学工程—橡胶工业] TQ332.5