SUBSTITUENT CHEMICAL SHIFT (SCS) AND THE SEQUENCE STRUCTURE OF ETHYLENE-α-OLEFINE COPOLYMERS——Ⅰ. Ethylene-Propylene Copolymers

Chinese Journal of Magnetic Resonance ›› 1990, Vol. 7 ›› Issue (4): 439-444.

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SUBSTITUENT CHEMICAL SHIFT (SCS) AND THE SEQUENCE STRUCTURE OF ETHYLENE-α-OLEFINE COPOLYMERS——Ⅰ. Ethylene-Propylene Copolymers

Zhou Zinan, Li Sanxi, Tian Wenjing, Pang Deren, Huang Baotong

Laboratory of Polymer Physics, Changchun Institute of Applied Chemistry Academia Sinica, Jilin, Changchun 130022, People's Republic of China

Received:1989-10-14 Revised:1990-10-04 Published:1990-12-05 Online:2018-01-23

Abstract

Abstract: In this paper, the ¹³C NMR chemical shift data of ethylenc-propylenc copolymer are treated according to a method of substituent chemical shift (SCS). The SCS parameters of EP copolymer (CH₃) could be obtained in the first time. Based on it, ¹³C NMR spectrum of the copolymer is assignd and the signal rcpresentatin of sequence structure are discussed briefly. Then, the se-qucnce distribution of several copolymers could be calculated by using a set of universal formalu and compared with each other.

Key words: Substituent chemical shift (SCS) or Substituent effect, ¹³C NMR, Ethylene-propylene copolymers, Sequence structure

Zhou Zinan, Li Sanxi, Tian Wenjing, Pang Deren, Huang Baotong. SUBSTITUENT CHEMICAL SHIFT (SCS) AND THE SEQUENCE STRUCTURE OF ETHYLENE-α-OLEFINE COPOLYMERS——Ⅰ. Ethylene-Propylene Copolymers[J]. Chinese Journal of Magnetic Resonance, 1990, 7(4): 439-444.

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SUBSTITUENT CHEMICAL SHIFT (SCS) AND THE SEQUENCE STRUCTURE OF ETHYLENE-α-OLEFINE COPOLYMERS——Ⅰ. Ethylene-Propylene Copolymers

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