| 异苯橡胶环化反应动力学研究及产物微细结构表征 |
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| 引用本文： | 孙晓日,顾江楠,余尚先,李大珍.异苯橡胶环化反应动力学研究及产物微细结构表征[J].影像科学与光化学,1995,13(3):234-240. |
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| 作者姓名： | 孙晓日 顾江楠 余尚先 李大珍 |
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| 作者单位： | 北京师范大学化学系, 北京 100875 |
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| 摘 要： | 本文采用红外光谱法研究了前无报导的聚异苯橡胶环化反应动力学,测定了标题反应的动力学参数:反应级数n=1;活化能Ea=53.2kJ·mol-1;指前因子A=2.24×106min-1,确立了该反应速率常数kT与s反应温度T之间的函数关系为:Ln(kT/min-1)=14.62-6.40×103K/T并采用核磁共振法分析了标题反应的产物环化异苯橡胶的微细结构,提出了标题反应的可能机理,并对活化能及指前因子进行了分析讨论。
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| 关 键 词： | 环化异苯橡胶 环化反应 动力学 IR 1HNMR |
| 收稿时间： | 1994-11-15 |
THE KINETIC STUDIES ON CYCLIZATION OF STYRENE-ISOPRENE RUBBER |
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| SUN XIAO-RI,GU JIANG-NAN,YU SHANG-XIAN,LI DA-ZHEN.THE KINETIC STUDIES ON CYCLIZATION OF STYRENE-ISOPRENE RUBBER[J].Imaging Science and Photochemistry,1995,13(3):234-240. |
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| Authors: | SUN XIAO-RI GU JIANG-NAN YU SHANG-XIAN LI DA-ZHEN |
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| Institution: | Department of Chemistry, Bdijing Normal University, Beijing, 100875, P. R. China |
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| Abstract: | The kinetics of the cyclization of styrene-isoprene rubber has been investigated by IRspectrum. Some kinetic parameters of this cyclization are determined.Reaction order n=1,apparent activation energy Ea=53.2 kJ·mol-1,preexponential factor A=2.24×106min-1.The structure of cyclized styrene-isoprene rubber was analysed by 1H NMR experiments.The possible mechanisms of this cyclization have been suggested and discussed. |
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| Keywords: | styrene-isoprene cyclization kinetics mechanism IR 1H NMR To whom correspondence should be addressed |
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