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化学学报
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化学学报 ›› 2007, Vol. 65 ›› Issue (20): 2331-2335. 上一篇    下一篇

研究论文

SEBS的间接氯甲基化研究

李礼1，韩利志1，周涛1，张爱民*,1，周立新2，周燎原2，梁红文2   

  1. (1四川大学高分子科学与工程国家重点实验室 成都 610065)
    (2巴陵石油化工有限责任公司合成橡胶事业部 岳阳 414014)
  • 投稿日期:2007-04-08 修回日期:2007-05-22 发布日期:2007-10-28
  • 通讯作者: 张爱民

Investigation of Indirect Chloromethylation for SEBS

LI Li1 HAN Li-Zhi1 ZHOU Tao1 ZHANG Ai-Ming*,1 ZHOU Li-Xin2 ZHOU Liao-Yuan2 LIANG Hong-Wen2   

  1. (1 State Key Laboratory of Polymer Material and Engineering, Sichuan University, Chengdu 610065)
    (2 Synthetic Rubber Business Department of Baling Petrochemical Co. Ltd, Yueyang 414014)
  • Received:2007-04-08 Revised:2007-05-22 Published:2007-10-28
  • Contact: ZHANG Ai-Ming

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1958

被引次数

7

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0.056 mol/L, 45 ℃, 12 h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.

关键词: 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), 氯甲基化反应, 特性粘度

An indirect chloromethylation of poly(styrene-b-ethylene-co-butadiene-b-styrene) (SEBS) was carried 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.

Key words: poly(styrene-b-ethylene-co-butadiene-b-styrene) (SEBS), chloromethylation reaction, intrinsic viscosity