Citation: Peng Yu Bi, Hui Ru Dong, Nan Nan Wang. Chemical inequivalence behavior of the protons attached to the same carbon in ethylene-propylene copolymer (EPC)[J]. Chinese Chemical Letters, ;2008, 19(4): 469-474. doi: 10.1016/j.cclet.2007.12.037 shu

Chemical inequivalence behavior of the protons attached to the same carbon in ethylene-propylene copolymer (EPC)

College of Science, Beijing University of Chemical Technology, Beijing 100029, PR China

Received Date: 5 November 2007

Six ethylene-propylene copolymer samples with different structural parameters were analyzed by ¹H NMR, ¹³C NMR and ¹H-¹³C COSY in this paper.With the aid of the ¹H-¹³C COSY spectra of ethylene-propylene copolymer, the chemical inequivalence behavior of the protons attached to the same carbon in the ethylene-propylene copolymer could be observed.Four basic types of chemical bonds were divided, and two kinds of main conformations were proposed to explain this phenomenon.Based on the calculation of conformation distribution, it can be proved that the explanation of this phenomenon was reasonable.
- Chemical inequivalence,
- Ethylene-propylene copolymer,
- NMR
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