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不同路易氏碱对丁二烯阴离子聚合机理和产物微观结构的影响

The Effect of Lewis Bases on the Anionic Polymerization Mechanism of Butadiene and on the Microstructure of its polymer

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【作者】 金关泰范立群姚薇徐瑞清

【Author】 Jin Guantai, Fan Liqun, Yao Wei and Xu Ruiqing(Beijing Institute of Chemical Technology, Beijing)

【机构】 北京化工学院北京化工学院 北京北京现在洛阳黎明化工研究院现在青岛化工学院

【摘要】 本文分别以四氢呋喃(THF)、二氧六环(DOX)和乙醚(Et2O)三种路易氏碱作为丁二烯在环已烷中,以正丁基锂(n-BuLi)为引发剂进行阴离子聚合的添加剂.作者先用大量实验数据验证了前文中提出丁二烯阴离子聚合新机理的前提下,用反应动力学和全概率理论推导的聚丁二烯产物中1,2结构含量(Bv)与[THF]定量关系式的适用范围;然后在采用不同添加剂时,求得了在不同温度下相应的综合平衡常数K′和络合溶剂化指数n值;最后在上述实验基础上,作者提出了一个有关丁二烯阴离子聚合的普适性机理.

【Abstract】 The mechanism of the anionic polymerization of butadiene and the quantitative relatioship of vinyl content versus the concentration of lewis bases including THF, DOX and Et2O were studied.Results obtained indicated that experimental data collected in the presence of the Lewis bases employed conformed with the quantitative relationship presented by the authors in their previous paper on this same subject. A complex equilibrium constant K’ and a coordination solvated index n were determined from the intercept and slope of the logarithmic equation at different temperatures. Moderate increases in reaction temperatures tended to bring about slight decreases in the values ot K’ and n. Quantitative relationships between K’ and/or n and temperature were obtained. A more generalized polymerization mechanism of butadiene was thereby proposed.

  • 【文献出处】 化工学报 ,Journal of Chemical Industry and Engineering(China) , 编辑部邮箱 ,1988年05期
  • 【被引频次】2
  • 【下载频次】81
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