波谱学杂志 ›› 1991, Vol. 8 ›› Issue (2): 179-186.

• 研究论文 • 上一篇    下一篇

氢化丁苯共聚物结构的核磁共振波谱表征Ⅰ.13C谱带的归属

陈理1, 彭勤纪1, 王用威1, 陈伟洁1, 余丰年1, 侯明山2   

  1. 1. 大连理工大学化工学院;
    2. 燕山石化公司研究院
  • 收稿日期:1990-08-11 修回日期:1990-11-01 出版日期:1991-06-05 发布日期:2018-01-20

NMR SPECTRUM CHARACTERIZATION OF HYDROGENATED STYRENE-BUTADIENE COPOLYMERS Ⅰ. Peak Assignments of 13C NMR Srectra

Chen Li1, Peng Qinji1, Wang Yongwei1, Chen Weijie1, Yu Fongnian1, Hou Mingshan2   

  1. 1. School of Chemical Engineering, Dalian University of Technology;
    2. Research Institute, Yanshan Petrochemical Corporation
  • Received:1990-08-11 Revised:1990-11-01 Online:1991-06-05 Published:2018-01-20

摘要: 本文分别用JEOL FX-90Q和Bruker AM-300波谱仪测定了氢化聚丁二烯和氢化丁苯共聚物的1H,13C-NMR谱,得到了分辨率较高的谱图和新的结构信息。借助DEPT技术确定了各谱带的CH或CH2类型。利用Grant-Paul和Lindeman-Adams介绍的化学位移经验计算公式,考虑苯基对αβγ碳原子的影响,计算了各种三单元序列中有关碳原子的化学位移。对脂肪碳部分的28组谱带重新进行了归属。化学位移计算值与实测值基本相符,并得到了不同组成的模型聚合物13C-NMR谱的各谱带强度变化规律的验证。

关键词: 氢化丁苯共聚物, 核磁共振波谱, 序列分布

Abstract: 1H-and 13C-NMR spectra of hydrogenated polybutadiene and hydrogenated styrene-butadiene copolymers were examined in this paper on the JEOL FX-90Q and Bruker AM-300 NMR spectrometers. Well resolved spectra and new structural information have been obtained. The kind of CH or CH2 of each peak is determined by the DEPT technique. Chemical shifts of relevant carbon atoms in the triads were calculated using Grant-Paul and Lindeman-Adams empirical methods. The effect of phenyl group on α, β and γ carbon atoms has been considered. New assignments of 28 groups of peaks in aliphatic carbon atom region are given and confirmed by the correlation between the peak intensity and the composition of the model copolymers. The calculated chemical shift values are essentially consistent with experimental results.

Key words: Hydrogenatcd styrene-butadiene copolymer, NMR spectrum, sequence distribution