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

doi:10.11938/cjmr20182648

Abstract

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

CLC Number:

O482.53

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

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