影像科学与光化学 ›› 1995, Vol. 13 ›› Issue (3): 234-240.DOI: 10.7517/j.issn.1674-0475.1995.03.234

• 研究论文 • 上一篇    下一篇

异苯橡胶环化反应动力学研究及产物微细结构表征

孙晓日, 顾江楠, 余尚先, 李大珍   

  1. 北京师范大学化学系, 北京 100875
  • 收稿日期:1994-11-15 修回日期:1995-05-31 出版日期:1995-08-20 发布日期:1995-08-20
  • 通讯作者: 余尚先

THE KINETIC STUDIES ON CYCLIZATION OF STYRENE-ISOPRENE RUBBER

SUN XIAO-RI, GU JIANG-NAN, YU SHANG-XIAN, LI DA-ZHEN   

  1. Department of Chemistry, Bdijing Normal University, Beijing, 100875, P. R. China
  • Received:1994-11-15 Revised:1995-05-31 Online:1995-08-20 Published:1995-08-20

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。

关键词: 环化异苯橡胶, 环化反应, 动力学, IR, 1HNMR

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.

Key words: styrene-isoprene, cyclization, kinetics mechanism IR, 1H NMR To whom correspondence should be addressed.