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.
Wide-line solid-state proton nuclear magnetic resonance(^1 H NMR)spectrometry is a classical technique to study the phase structures of semi-crystalline polymers.In this paper,the wide-line solid-state^1 H 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^1 H NMR spectra were assigned to the crystallization phase,crystalline interface phase,amorphous interface phase and a morphous phase,respectively.The chain dynamics in different phase was also studied with the temperature-dependent wide-line solid-state^1 H NMR method.The difficulties in determining the crystallinity of semi-crystalline polymers with wide-line solid-state^1 H NMR were discussed.
作者
吴金泽
辛家祥
付晓彬
姚叶锋
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,Shangh ai 200062,China)
出处
《波谱学杂志》
CAS
北大核心
2019年第1期23-33,共11页
Chinese Journal of Magnetic Resonance
基金
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
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
wide-line solid-state^1 H NMR
semi-crystalline polymer
phase structure
interphase
chain motion
