通过宽线固体核磁共振氢谱研究半晶高分子的相结构

doi:10.11938/cjmr20182648

波谱学杂志 ›› 2019, Vol. 36 ›› Issue (1): 23-33.doi: 10.11938/cjmr20182648

通过宽线固体核磁共振氢谱研究半晶高分子的相结构

吴金泽, 辛家祥, 付晓彬, 姚叶锋

华东师范大学物理与材料科学学院, 上海市磁共振重点实验室, 上海 200062

收稿日期:2018-05-14 出版日期:2019-03-05 发布日期:2019-02-26
通讯作者: 姚叶锋,Tel:021-62234328,E-mail:yfyao@phy.ecnu.edu.Cn E-mail:yfyao@phy.ecnu.edu.Cn
基金资助:
国家自然科学基金资助项目（21574043，41572103）；中央高校基本科研业务费专项资金.

A Wide-Line Solid-State ¹H NMR Study of Phase Structures of Semi-Crystalline Polymers

WU Jin-ze, XIN Jia-xiang, FU Xiao-bin, YAO Ye-feng

Shanghai Key Laboratory of Magnetic Resonance, College of Physics and Materials Science, East China Normal University, Shanghai 200062, China

Received:2018-05-14 Online:2019-03-05 Published:2019-02-26

摘要/Abstract

摘要： 宽线固体核磁共振氢谱（¹H NMR）是一种研究半晶高分子相结构的经典方法.本文以半晶聚乙烯的宽线固体¹H NMR谱为例，探讨了通过Gaussian/Sinc、Gaussian和Lorentzian函数组合对宽线固体¹H NMR谱图进行拟合的方案，并根据半晶聚乙烯的相结构成分对拟合得到的各信号成分进行归属.并在此基础上探讨了各个相结构中分子链运动与信号线型的相关性，以及利用宽线固体¹H NMR谱测量半晶高分子结晶度存在的困难.

关键词: 宽线固体核磁共振氢谱, 半晶高分子, 相结构, 界面, 分子链运动

Abstract: Wide-line solid-state proton nuclear magnetic resonance (¹H NMR) spectrometry is a classical technique to study the phase structures of semi-crystalline polymers. In this paper, the wide-line solid-state ¹H NMR spectrum of semi-crystalline polyethylene was acquired, and fitted with the combination of Gaussian/Sinc, Gaussian and Lorentzian functions. The four signal components decomposed from the wide-line solid-state ¹H NMR spectra were assigned to the crystallization phase, crystalline interface phase, amorphous interface phase and amorphous phase, respectively. The chain dynamics in different phase was also studied with the temperature-dependent wide-line solid-state ¹H NMR method. The difficulties in determining the crystallinity of semi-crystalline polymers with wide-line solid-state ¹H NMR were discussed.

Key words: wide-line solid-state ¹H NMR, semi-crystalline polymer, phase structure, interphase, chain motion

中图分类号:

O482.53

吴金泽, 辛家祥, 付晓彬, 姚叶锋. 通过宽线固体核磁共振氢谱研究半晶高分子的相结构[J]. 波谱学杂志, 2019, 36(1): 23-33.

WU Jin-ze, XIN Jia-xiang, FU Xiao-bin, YAO Ye-feng. A Wide-Line Solid-State ¹H NMR Study of Phase Structures of Semi-Crystalline Polymers[J]. Chinese Journal of Magnetic Resonance, 2019, 36(1): 23-33.

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通过宽线固体核磁共振氢谱研究半晶高分子的相结构

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A Wide-Line Solid-State ¹H NMR Study of Phase Structures of Semi-Crystalline Polymers