勤慎论道 第一百九十九讲 Prof. Toshikazu Miyoshi谈“Elucidations of Structure and Molecular Dynamics of Complex Polymers by State-of-Art Solid-State NMR Spectroscopy”

报告题目：Elucidations of Structure and Molecular Dynamics of Complex Polymers by State-of-Art Solid-State NMR Spectroscopy

报 告 人：Prof. Toshikazu Miyoshi

报告人单位：The University of Akron

报告时间：2023年12月13日（周三）下午13：30

报告地点：仓前校区 勤园17号楼210

邀 请 人：李勇进 教授

报告人简介：

       Toshikazu Miyoshi is a NMR spectroscopist of polymers. Prior to joining The University of Akron in 2010, he spent almost ten years as a researcher at National Institute of Advanced Industrial Science and Technology, Japan. His undergraduate degrees are in Polymer Science (Univ. of Hokkaido); his graduate degrees are in Chemistry from Kyoto University; and his postdoctoral research was in the study of NMR spectroscopy for fluoropolymers at the Institute of Polymer Research, Dresden, Germany.

研究领域：

■ Solid-state NMR spectroscopy of polymers

■ Structure and dynamics of polymers, block-copolymers, supramolecules, polymer blends

讲座介绍：

     State-of-the art solid-state NMR spectroscopy is one of powerful experimental tools to access structure and molecular dynamics of soft matters, especially, synthetic polymers at the atomic levels. In this talk, I will present our recent efforts on i) chain trajectory and polymer crystallization ^{[1, 2]}, ii) molecular dynamics, co-crystallization, and sustainability ^{[3, 4]}, and iii) solid-phase chemical reactions for carbon fiber precursors ^[5] by using various advanced solid-state NMR techniques.

References

[1] Jin, F., M.T., et al. Polymer Chains Fold Prior to Crystallization. ACS Macro. Lett., 11, 284-288, 2022.

[2] Jin, F., M.T., et al. Impact of Entanglements on Chain-Folding Structure of Semicrystalline Polymer during Crystallization. ACS Macro. Lett., 12, 1138-1143, 2023.

[3] Zheng, Y., M. T. et al. Asymmetric Molecular Dynamics and Anisotropic Phase Separation in Cocrystal of Crystalline/Crystalline Polymer Blend. ACS Macro Lett., 11, 193-198, 2022.

[4] Kafle, N., M.T., et al. Roles of Conformational Flexibility for the Crystallization of Stereo-irregular Polymer. Macromolecules, 54, 5705-5718, 2021.

[5] Ma J., M.T. et al. Chemical Reaction in Poly(acrylonitrile-co-itaconic acid) during Stabilization as Revealed by Solid-state NMR Spectroscopy and ¹³C Isotope Labeling. Carbon 215, 118432, 2023.