NMR Methods for Characterization of Synthetic and Natural Polymers
Chapter 14: Structure and Molecular Dynamics of Semicrystalline Polymers as Studied by Solid-state NMR
Published:29 Jul 2019
Special Collection: 2019 ebook collectionSeries: New Developments in NMR
Z. Zheng, J. Ma, K. Wang, F. Jin, and T. Miyoshi, in NMR Methods for Characterization of Synthetic and Natural Polymers, ed. R. Zhang, T. Miyoshi, and P. Sun, The Royal Society of Chemistry, 2019, ch. 14, pp. 299-324.
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Chain-level structure of semicrystalline polymers in melt- and solution-grown crystals has been debated over the past several decades. Recently, 13C–13C double quantum (DQ) NMR spectroscopy and spin-dynamics simulation have been applied to trace chain trajectory and packing structure of 13C labeled polymers in melt- and solution-grown crystals. We highlight recent NMR studies for (i) packing structure, (ii) chain trajectory, (iii) conformation of the folded chains, (iv) nucleation mechanisms in the early stage of crystallization, and (v) deformation mechanism at the molecular scale of semicrystalline polymers.