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.
作者
刘建业
杜晓威
王朋园
牛春梅
LIU Jianye;DU Xiaowei;WANG Pengyuan;NIU Chunmei(Hebei University of Science and Technology,Shijiazhuang 050018,China)
出处
《橡胶工业》
CAS
2020年第1期61-64,共4页
China Rubber Industry
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
NR
natural latex
epoxidation
emulsifier
neutralizer
buffering agent
temperature
catalyst
epoxy
reaction efficiency
