| Chemical inequivalence behavior of the protons attached to the same carbon in ethylene-propylene copolymer（EPC） |
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| 作者姓名： | Peng Yu Bi Hui Ru Dong~* Nan Nan Wang College of Science Beijing University of Chemical Technology Beijing PR China |
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| 作者单位： | College of Science, Beijing University of Chemical Technology, Beijing 100029, PR China |
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| 摘 要： | 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.
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| 关 键 词： | 乙烯-丙烯共聚体 NMR 质子吸附 分子分析 |
| 收稿时间： | 5 November 2007 |
Chemical inequivalence behavior of the protons attached to the same carbon in ethylene-propylene copolymer (EPC) |
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| Peng Yu Bi Hui Ru Dong* Nan Nan Wang College of Science,Beijing University of Chemical Technology,Beijing ,PR China.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. |
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| Authors: | Peng Yu Bi Hui Ru Dong Nan Nan Wang |
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| Institution: | College of Science, Beijing University of Chemical Technology, Beijing 100029, PR China |
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| Abstract: | 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. |
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| Keywords: | Chemical inequivalence Ethylene-propylene copolymer NMR |
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