波谱学杂志 ›› 1993, Vol. 10 ›› Issue (1): 47-54.

• 研究论文 • 上一篇    下一篇

取代基效应(SCS)与乙烯-α-烯烃共聚物的序列结构——7.氢化丁苯共聚物(HBS)

田文晶, 周子南, 冯之榴, 吴盛容, 景凤英, 张建国, 裴奉奎   

  1. 中国科学院长春应用化学研究所高分子物理开放实验室, 长春 130022
  • 收稿日期:1992-03-16 出版日期:1993-03-05 发布日期:2018-01-20
  • 基金资助:
    高分子物理开放实验室资助项目

SUBSTITUENT CHEMICAL SHIFT (SCS)AND THE SEQUENCE STRUCTURE OF ETHYLENE-α-OLEFINE COPOLYMERS——7. Hydrogenated Butadiene-Styrene Copolymer

Tian Wenjing, Zhou Zinan, Feng Zhiliu, Wu Shengrong, Jing Fengying, Zhang Jianguo, Pei Fengkui   

  1. Laboratory of Polymer Physics, Changchun Institute of Applied Chemistry, The Chinese Academy Sciences, Jilin, Changchun 130022
  • Received:1992-03-16 Online:1993-03-05 Published:2018-01-20

摘要: 测定了两个氢化丁苯共聚物样品的1H、13C NMR谱。通过处理文献中的13C NMR谱数据得到了-C2H5和-C6H5的SCS参数。利用乙烯-α-烯烃共聚物的SCS方法结合DEPT NMR实验技术重新归属了该共聚物的13C NMR谱。明确指出,氢化丁苯共聚物分子链中主链任何一个乙烯单元的两个CH2在序列分布上分属于二元组和三元组。CH则用三元组来表征。最后,对HBS共聚物的序列分布进行了计算。

关键词: 乙烯-α-烯烃共聚物, 取代基效应(SCS), 序列结构, 氢化丁苯共聚物(HBS)

Abstract: Two hydrogenated butadiene-styrene copolymer (HBS) samples are studied by 1H NMR and 13C NMR by using JEOL-FX100 NMR and Varian UNITY-400 superconductive spectrometer. The SCS parameters of ethyl (-C2H5) and benzyl (-C6H5) are obtained by dealing with the 13C NMR data from references. The 13C NMR spectrum of HBS is reassigned by using the SCS method of ethylene-α-olefin copolymers and the DEPT NMR experiment. It is pointed out that the two methylenes of any ethylene unit in the main chain of HBS belong to dyad and triad respectively. The methine in the main chain is expressed by triad.
Finally the sequence distribution of dyad and triad is calculated. The molar composition of styrene, butene and ethylene unit in HBS calculated from 13C NMR spectrum is consistant with that calculated from 1H NMR spectrum.

Key words: Ethylene-a-olefin copolymers, Substituent chemical shift (SCS), Sequence structure, Hydrogenated butadiene-styrene copolymer (HBS)