摘要
研究了以二甲氧基甲烷和氯化亚砜为原料实现氢化聚苯乙烯-乙烯丁烯无规共聚物-聚苯乙烯三嵌段共聚物(SEBS)苯环对位上的间接氯甲基化.通过红外光谱和核磁氢谱表征了氯甲基化SEBS的化学结构;采用佛尔哈德法测定了氯甲基化程度.通过对比研究几种催化剂的催化效果,表明氯化锌催化效果最佳,在氯化锌浓度仅为0.056mol/L,45℃,12h内即可使SEBS的苯环对位氯甲基化程度达到28.94%.本文还探讨了催化剂用量、反应温度、反应时间对接氯甲基化程度的影响.
An indirect chloromethylation of poly（styrene-b-ethylene-co-butadiene-b-styrene） （SEBS） was carded out with dimethoxymethane and sulphurous oxychloride as starting materials. The structure of chloromethylated SEBS was characterized with FIRT and 1H NMR, and its chloromethylation degree was measured with a Volhard method. The catalysis effects of different catalysts were compared, and results showed that ZnCl2 had the best catalystic effects. Only 0.056 mol/L of catalyst was needed to chloromethylate SEBS to 28.94% chloromethylation degree at 45℃ in 12 h. Effects of catalyst concentration, reaction temperature and reaction time on the chloromethylation degree were discussed.
出处
《化学学报》
SCIE
CAS
CSCD
北大核心
2007年第20期2331-2335,共5页
Acta Chimica Sinica
基金
国家高技术研究发展项目(863计划)(No.2003AA333020)资助项目.
