| STUDY OF THE MOLECULAR MOTION IN POLYEPICHLOROHYDRIN BY HIGH RESOLUTION NMR |
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| 引用本文： | 贾铭椿,沈联芳,钱保功. STUDY OF THE MOLECULAR MOTION IN POLYEPICHLOROHYDRIN BY HIGH RESOLUTION NMR[J]. 高分子科学, 1993, 0(3): 220-229 |
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| 作者姓名： | 贾铭椿 沈联芳 钱保功 |
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| 作者单位： | Wuhan Institute of Physics，The Chinese Academy of Sciences，Wuhan 430071，Wuhan Institute of Physics，The Chinese Academy of Sciences，Wuhan 430071，Wuhan Institute of Physics，The Chinese Academy of Sciences，Wuhan 430071 |
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| 摘 要： | The molecular motion in polyepichlorohydrin (PEPCH), in solution and bulk, was studied by high resolution NMR by means of line width, spin-lattice relaxation time T_1 and nuclear Overhauser effect NOE. The results show that the VJGM model can describe the main chain motion of PEPCH in solution perfectly. In bulk state, the relationship between the line width and the temperature is consistent with WLF equation, but that between the high frequency molecular motion correlation time (in T_1 scale ) and temperature is consistent with Arrhenius equation. The motion parameters of PEPCH in both states were calculated. The internal rotation motion of side—CH_2Cl group was analyzed by using equal three-site jump and diffusion internal rotation model in both states.
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| 收稿时间： | 1992-02-27 |
STUDY OF THE MOLECULAR MOTION IN POLYEPICHLOROHYDRIN BY HIGH RESOLUTION NMR |
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| JIA Mingchun,SHEN Lianfang,QIAN Baogong. STUDY OF THE MOLECULAR MOTION IN POLYEPICHLOROHYDRIN BY HIGH RESOLUTION NMR[J]. Chinese Journal of Polymer Science, 1993, 0(3): 220-229 |
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| Authors: | JIA Mingchun SHEN Lianfang QIAN Baogong |
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| Affiliation: | Wuhan Institute of Physics; The Chinese Academy of Sciences; Wuhan |
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| Abstract: | The molecular motion in polyepichlorohydrin (PEPCH), in solution and bulk, was studied by high resolution NMR by means of line width, spin-lattice relaxation time T1 and nuclear Overhauser effect NOE. The results show that the VJGM model can describe the main chain motion of PEPCH in solution perfectly. In bulk state, the relationship between the line width and the temperature is consistent with WLF equation, but that between the high frequency molecular motion correlation time (in T1 scale ) and temperature is consistent with Arrhenius equation.The motion parameters of PEPCH in both states were calculated.The internal rotation motion of side-CH2Cl group was analyzed by using equal three-site jump and diffusion internal rotation model in both states. |
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| Keywords: | Polyepichlorohydrin Molecular motion NM R NM R relaxation |
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