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Polymer Chains Fold Prior to Crystallization

https://doi.org/10.1021/acsmacrolett.1c00789

Jin, Fan; Yuan, Shichen; Wang, Shijun; Zhang, Yi; Zheng, Ying; Hong, You-lee; Miyoshi, Toshikazu (March 2022, ACS Macro Letters)

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Intramolecular and Intermolecular Packing in Polymer Crystallization

https://doi.org/10.1021/acs.macromol.9b00702

Wang, Shijun; Yuan, Shichen; Wang, Kun; Chen, Wei; Yamada, Koji; Barkley, Deborah; Koga, Tadanori; Hong, You-lee; Miyoshi, Toshikazu (June 2019, Macromolecules)

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Structural Unit of Polymer Crystallization in Dilute Solution As Studied by Solid-State NMR and ¹³ C Isotope Labeling

https://doi.org/10.1021/acs.macromol.8b01950

Wang, Shijun; Yuan, Shichen; Chen, Wei; Zhou, Yang; Hong, You-lee; Miyoshi, Toshikazu (October 2018, Macromolecules)

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Chain Trajectory, Chain Packing, and Molecular Dynamics of Semicrystalline Polymers as Studied by Solid-State NMR

https://doi.org/10.3390/polym10070775

Wang, Shijun; Hong, You-Lee; Yuan, Shichen; Chen, Wei; Zhou, Wenxuan; Li, Zhen; Wang, Kun; Min, Xu; Konishi, Takashi; Miyoshi, Toshikazu (July 2018, Polymers)

Chain-level structure of semicrystalline polymers in melt- and solution-grown crystals has been debated over the past half century. Recently, 13C–13C double quantum (DQ) Nuclear Magnetic Resonance (NMR) spectroscopy has been successfully applied to investigate chain-folding (CF) structure and packing structure of 13C enriched polymers after solution and melt crystallization. We review recent NMR studies for (i) packing structure, (ii) chain trajectory, (iii) conformation of the folded chains, (iv) nucleation mechanisms, (v) deformation mechanism, and (vi) molecular dynamics of semicrystalline polymers.
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