摘要
采用过硫酸氢钾复合盐（Oxone）/丙酮体系制备二甲基双环氧乙烷（DMD）环氧化LMPIB（低相对分子质量聚异丁烯）。探讨了反应体系中溶剂、n（Oxone）∶n（NaHCO3）比例、V（H2O）∶V（丙酮）比例、反应温度和反应时间等对产物的双键转化率、环氧值和环氧收率的影响。结果表明：采用单因素试验法优选出DMD环氧化LMPIB的适宜工艺条件是＂0~5℃反应0.5 h→25℃反应1.5 h＂、n（Oxone）∶n（NaHCO3）=1∶2.40和V（H2O）∶V（丙酮）=5∶4,即反应体系中水150 mL、丙酮120 mL、Oxone和NaHCO3分别为23.05 g和15.12 g;此时,环氧化LMPIB的环氧值0.138 8 mol/100 g、双键转化率62.68%和环氧收率67.10%。
A DMD（dimethyl dioxirane） epoxidized LMPIB（low molecular weight polyisobutylene） was prepared by potassium hydrogen persulfate triple salt（Oxone）/acetone system. The influences of some factorslsuch as solvent, molar ratio of n （Oxone） ： n （ NaHC O3）, volume ratio of V（H20） ： V（acetone）, reaction temperature and reaction timel in reaction system on the double bonds convesion, epoxide number and epoxidation yield of product were discussed. The results showed that the optimal process conditions of DMD epoxidized LMPIB were preferred by single factor experiment when the reaction temperature and time were ＂0-5 ℃ reaction 0.5 h before 25℃ reaction 1.5 h＂, molar ratio of n （Oxone） ： n （NaHCO3） was 1 ： 2.40, and volume ratio of V（I-I20） ： V（acetone） was 5： 4, namely water, acetone, Oxone and NaHCO3 were 150 mL, 120 mL, 23.05 g and 15.12 g respectively in reaction system. Here, the epoxide number, double bonds conversion and epoxidation yield of epoxidized LMP1B were 0.138 8 mol/100 g, 62.68% and 67.10% respectively.
出处
《中国胶粘剂》
CAS
北大核心
2014年第8期20-23,共4页
China Adhesives
关键词
过硫酸氢钾复合盐
二甲基双环氧乙烷
低相对分子质量聚异丁烯
环氧化
potassium hydrogen persulfate triple salt （Oxone）
dimethyl dioxirane （DMD）
low molecular weight polyisobutylene （ LMPIB ）
epoxidized
