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取代基效应(SCS)与乙烯-α-烯烃共聚物的序列结构Ⅱ.取代基效应方法
引用本文:周子南,田文晶.取代基效应(SCS)与乙烯-α-烯烃共聚物的序列结构Ⅱ.取代基效应方法[J].波谱学杂志,1991,8(1):55-61.
作者姓名:周子南  田文晶
作者单位:中国科学院长春应用化学研究所高分子物理开放实验室 吉林 长春 130022
基金项目:高分子物理开放实验室资助项目
摘    要:本文提出了一种解析乙烯-α-烯烃共聚物的13C NMR谱的取代基效应方法,它揭示了存在于共聚物序列结构与13C谱之间的对应关系,并对这种关系进行了系统的阐述。文章中首次按上述对应关系明显与否将共聚物13C谱分成两类,并给出进行分类的三种判据:SCS参数,共单体均聚物的13C谱,以及取代基的电性。文章最后比较了取代基效应方法与Grant-Paul方法的异同。

关 键 词:取代基效应方法  13C  NMR  乙烯-α-烯烃共聚物  序列结构  
收稿时间:1990-10-10

SUBSTITUENT CHEMICAL SHIFT (SCS) AND THE SEQUENCE STRUCTURE OF ETHYLENE-α-OLEFIN COPOLYMERS Ⅱ.Method of SUBSTITUENT Chemical Shift (SCS)
Zhou Zinan Tian Wenj/ng Wu Shengrong Zhang Jianguo and Pel Fengkui.SUBSTITUENT CHEMICAL SHIFT (SCS) AND THE SEQUENCE STRUCTURE OF ETHYLENE-α-OLEFIN COPOLYMERS Ⅱ.Method of SUBSTITUENT Chemical Shift (SCS)[J].Chinese Journal of Magnetic Resonance,1991,8(1):55-61.
Authors:Zhou Zinan Tian Wenj/ng Wu Shengrong Zhang Jianguo and Pel Fengkui
Institution:Laboratory of Polymer Physics, Changchun Institute of Applied Chemistry, Academia Sciences, Jilin, Changchun 130022, People's Republic of China
Abstract:A method, substituent chemical shift (SCS), which is used in assignments of the 13C NMR spectra of ethylene-α-olefine copolymers, is proposed in this paper. The SCS method reveals the corresponding relation bctwce the peaks of spectrum of the copolymer and its sequences. At the same time, the relation is elucidated in a systematic way. The 13C NMR spectra of the copolymers are firstly divided into two categories according to the above mentioned relation apparent or not. Secondly, three critcrions for classification are suggested:SCS parameters (S1 and S2), spectrum of comonomer homopolymer and electrowithdrawing or electrodonating of substituent. Finally, the SCS method is compared with the Grant-Paul method in many ways.
Keywords:Substituent chemical shift (SCS) or substituent effect  13C NMR  Ethylene-a -olefine copolymers (ethylene-vinyl substituted copolymers)  Sequence structure  
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