Dr.   Toshikazu     Miyoshi

Dr. Toshikazu Miyoshi

Associate Professor
Department of Polymer Science
Phone: 330-972-6269
Email: miyoshi@uakron.edu


  • 1997 Ph.D. Chemistry, Kyoto University, Japan
  • 1994 M.S. Polymer Science, Hokkaido University, Japan
  • 1992 B.S. Polymer Science, Hokkaido University, Japan

Research Interests

  • Solid-state NMR spectroscopy of polymers
  • Structure and dynamics of polymers, block-copolymers, supramolecules, polymer blends

Contact Information

Dr. Toshikazu Miyoshi
The University of Akron
Department of Polymer Science
Goodyear Polymer Center 723
Akron, Ohio 44325-3909

E-mail: miyoshi@uakron.edu
Voice: (330) 972-6269
Fax: (330) 972-5290



(The University of Akron)

  1. Hong, Y.-l.*; Chen, W.; Yuan, S.; Kang J.; Miyoshi T.* “Chain Trajectory of Semicrystalline Polymers As Revealed by Solid-State NMR Spectroscopy (Viewpoints, ACS Editors’ Choice)” Accepted in ACS Macro Lett. 02/09/2016.
  2. Kang, J.; Yuan, S.; Hong, Y-l.; Cheng, W.; Kamimura, A.; Otsubo, A. Miyoshi, T.* “Unfolding of Isotactic Poly(propylene) under Uniaxial Stretching” ACS Macro Lett. 5, 65–68, 2016.
  3. Chen, W.; Wang, S.; Zhang, W.; Hong, Y-l.;* Miyoshi, T.* “Molecular Structural Basis for Stereocomplex Formation of Poly(Lactide)s in Dilute Solution” ACS Macro Lett. 4, 1264–1267, 2015.
  4. Wang, S.; Kang, J.; Jain, D.; Miyoshi, T.* “Applicaiton of Solid-state NMR to Polymer Characterization (Invited Article)” Accepted in Nuclear Mangetic Resoncence, 46, 2016, Royal Society of Chemistry Publishing, Cambridge, U.K., 01/15/2016
  5. Yuan, S.; Li, Z.; Hong, Y-l.; Kang, J.; Kamimura, A.; Otsubo, A.; Miyoshi, T.* “Folding of Polymer Chains in the Early Stage of Crystallization” ACS Maco Lett., 4, 1382–1385, 2015.
  6. Hong, Y.-l.; Yuan, S.; Li, Z.; Ke, Y.; Nozaki, K.; Miyoshi, T.* “Three-Dimensional Conformation of Folded Polymers in Single Crystals” Phys. Rev. Lett. 115, 168301, 2015.
  7. Jain, D.; Zhang, C.; Cool, L. C.; Blackledge, T. A.; Wesdemiotis, C.; Miyoshi, T.; Dhinojwala, A.* “Composition and Function of Spider Glues Maintained During the Evolution of Cobwebs” Biomacromolecules 16, 3373–3380, 2015.
  8. Li, Z.; Hong, Y.-l.; Yuan, S.; Kang, J.; Kamimura, A.; Ohtsubo, A.; Miyoshi, T.* “Determinaiton of Chain Folding Strcutre of Isotactic-Polypropylene Melt-Grown α Crystals by 13C-13C Double Quantum NMR and Selective Isotopic Labeling” Macromolecules 48, 5752–5760, 2015.
  9. Liu, X.; Chen, W.; Hong, Y-l.; Yuan, S.; Kuroki, S.; Miyoshi, T.* “Stabilization of Atactic-Polyacrylonitrile under Nitrogen and Air as Studied by Solid-state NMR” Macromolecules 48, 5300–5309, 2015.
  10. Gu, S.; Li, Z.; Miyoshi, T.; Jana, S. C.* “Polybenzoxazine Aerogels with Controllable Pore Structures” RSC Advances 5, 26801–26805, 2015.
  11. Hong, Y.-l.; Koga, T.; Miyoshi, T.* “Chain Trajectory and Crystallization Mechanism of Semicrystalline Polymer in Melt- and Solution-Grown Crystals as Studied by 13C-13C Double Quantum NMR” Macromolecules 48, 3282–3293, 2015.
  12. Chen, W.; Reichert. D.; Miyoshi, T.* “Short-Range Correlation of Successive Helical Jump Motions of Poly(L-Lactic Acid) Chains in the α Phase as Revealed by Solid-State NMR” J. Phys. Chem. B 119, 4552–4563, 2015.
  13. Yuan, S.; Li, Z.; Kang, J.; Hong, Y.-l.; Kamimura, A.; Otsubo, A.; Miyoshi, T.* “Determination of Local Packing Structure of Mesomorphic Form of Isotactic Polypropylene by Solid-State NMR” ACS Macro Lett. 4, 143–146, 2015.
  14. Jain, D.; Alyssa, S. Y.; Niewiarowski, P. H.; Miyoshi, T.; Dhinojwala, A.* “NMR Spectroscopy reveals the presence and association of lipids and keratin in adhesive gecko setae” Scientific Reports 5, 9594, 2015.
  15. Bahl, K.; Miyoshi, T.; Jana, S. C.* “Hybrid fillers of lignin and carbon black for lowering of viscoelastic loss in rubber compounds” Polymer 55, 3825–3835, 2014.
  16. Hong, Y.-l.; Miyoshi, T.* “Elucidation of the Chain-Folding Structures of a Semi-crystalline Polymer in Single Crystals by Solid-state NMR Spectroscopy” ACS Macro Lett. 3, 556–559, 2014.
  17. Kang, J.; Miyoshi, T.* “Two Chain-Packing Transformations and their Effects on the Molecular Dynamics and Thermal Properties of α-Form Isotactic Poly(propylene) under Hot Drawing: A Solid-State NMR Study” Macromolecules 47, 2993–3004, 2014.
  18. Sahni,V.; Miyoshi, T.; Chen, K.; Blamires, S. J.; Jain, D.; Blackledge, T. A.; Dhinojwala, A.* “Why Do Spiders Use ‘Salty Silk?” Biomacromolecules 15, 1225–1232, 2014.
  19. Hong, Y.-l.; Miyoshi, T.* “Solid−state NMR Characterizations of Polymer Chain Structure and Dynamics in Polymer Crystals” Encyclopedia of Polymers and Composite, Springer, 2014.
  20. Huang, T. M.; Batra, S.; Hu, J.; Miyoshi, T.; Cakmak, M.* “Chemical Cross-linking of Conducting Poly (3, 4 - ethylenedioxythiophene): Poly(styrenesulfonate) (PEDOT:PSS) Using Poly (ethylene oxide) (PEO)” Polymer 54, 6455–6462, 2013.
  21. Chen, W.; Sun, H. J.; Miyoshi, T.* “The Unique Molecular Dynamics of Structural Elements in an Asymmetric Janus Bisamide Supramolecule Characterized by Solid−state NMR” J. Phys. Chem. B 117, 13698–13709, 2013.
  22. Tang, C.; Inomata, A.; Sakai, Y.; Yokoyama, H.; Miyoshi, T.;* Ito, K. “Effects of Chemical Modification on the Molecular Dynamics of Complex Polyrotaxanes Investigated by Solid-state NMR” Macromolecules 46, 6898–6907, 2013.
  23. Li, Z.; Miyoshi, T.;* Mani, S.; Koga, T.; Otsubo, A.; Kamimura, A. “Solid-state NMR Characterization of the Chemical Defects and Physical Disorders in α Form of Isotactic Poly(propylene) Synthesized by Ziegler−Natta Catalysts” Macromolecules 46, 6507–6519, 2013.
  24. Hong, Y.-l.; Miyoshi, T.* “Chain-Folding Structure of a Semicrystalline Polymer in Bulk Crystals Determined by 13C-13C Double Quantum NMR” ACS Macro. Lett. 2, 501–505, 2013.
  25. Murthy, M.; Daniel; W.; Tang, C.; Weizheng, F.; Moses, O.; Miyoshi, T.; Joy, A.* “Photoresponsive coumarin polyesters that exhibit crosslinking and chain scission properties” Macromolecules 46, 5133–5140, 2013.
  26. Jaffe, R.; * Yamashita, Y.; Mai, N.; Cooper, W. T.; Dittmar, T.; Dodds, W. K.; Jones, J. B.; Miyoshi, T.; Ortiz-Zyas, J. R.; Podgorski, D. C.; Watanabe, A. “Dissolved Organic Matter in Headwater Streams: Compositional Variability across Climatic Regions of North America” Goechimica et Cosmochimica Acta 94, 95–108, 2012.
  27. Miyoshi, T.;* Mamun, A. “Critical Roles of Molecular Dynamics for Superior Mechanical Property of Isotactic–Poly(1–butene) Eludicated by Solid-state NMR” Polymer J. 44, 65–71, 2012.
  28. Miyoshi, T.* “Molcular Dynamics and Structure of Crystalline Regions of Isotactic–Poly(olefins) Characterized by Solid–state NMR” ACS Symposium Series, 107, Chapter 12, 191–206, 2011.
  29. (AIST, Japan)

  30. Miyoshi, T.;* Hu, W.; Li, Y. “Dynamic Geometry and Kinetics of Polymer Confined in Self–Assembly via Cooperative Hydrogen Bonding: A Solid–state NMR Study under Paramagnetic Doping” Macromolecules 43, 4435–4437, 2010.
  31. Miyoshi, T.;* Mamun, A.; Hu, W. “Molecular Ordering and Molecular Dynamics in Isotactic–Poly(propylene) Characterized by SS–NMR” J. Phys. Chem. B. 114, 92–100, 2010.
  32. Miyoshi, T.;* Mamun, A.; Reichert, D. “Fast Dynamics and Conformations of Polymer in a Conformational Disordered Crystal Characterized by 1H–13C WISE NMR” Macromolecules 43, 3986–3989, 2010.
  33. Ikeda S.;* Tabata, Y.; Suzuki, H.; Miyoshi, T.; Katsumura, Y. “Formation of Cross linked PTFE by Radiation-Induced Solid-state Polymerization of Tetrafluoroethylene at Low Temperatures” Rad. Phys. Chem. 77, 401–408, 2008.
  34. Ikeda S.;* Tabata, Y.; Suzuki, H.; Miyoshi, T.; Kudo, H.; Katsumura, Y. “Radiation Induced Synthesis of Low Molecular Weight of PTFE and Their Cross linking in Acetone Medium” Rad. Phys. Chem. 77, 1050–1056, 2008.
  35. Miyoshi, T.;* Hu, W.; Hagihara, H. “Local Packing Disorders in a Polymer Crystal by Two Dimensional Solid–State NMR” Macromolecules 40, 6789–6792, 2007.
  36. Hu, W.; Hagihara, H.; Miyoshi, T.* “Microstructural analysis of insoluble polyolefins by melt–state C–13 NMR at very high temperatures” Macromolecules 40, 3505–3509, 2007.
  37. Hu, W.; Hagihara, H.; Miyoshi, T.* “Microstructure and thermal property of isotactic poly(3–methyl–1–butene) obtained using the C–2-symmetrical zirconocene/MAO catalyst system” Macromolecules 40, 1763–1766, 2007.
  38. Maie, N.; Jaffe, R.;* Miyoshi, T. “Quantitative and qualitative aspects of dissolved organic carbon leached from senescent plants in an oligotrophic wetland” Biogeochemistry 78, 285–314, 2006.
  39. Miyoshi, T.;* Kaji, H. “Recent Progress in Polymer Science: Precise Solid-State NMR Characterization of Polymer Materials” Koubunshi 55, 744–749, 2006 (in Japanese).
  40. Maie, N.; Yang, C.-Y.; Miyoshi, T.; Parish, K.; Jaffé, R.* “Chemical characteristics of dissolved organic matter (DOM) in an extremely oligotrophic subtropical wetland” Limnology and Oceanography 50, 23–35, 2005.
  41. Zhu, S. M.; Zhou, H. S.;* Miyoshi, T. “Self-assembly of the mesoporous electrode material Li3Fe2(PO4)(3) using a cationic surfactant as the template” Advanced Materials 16, 2012, 2004.
  42. Miyoshi, T.* “Slow dynamics of polymer crystallites revealed by solid-state MAS exchange NMR” Koubunshi Ronbunshuu 61, 442–457, 2004.
  43. Miyoshi, T.;* Pascui, O.; Reichert, D. “Slow chain dynamics in isotactic-poly(4–methyl–1–pentene) crystallites near the glass transition temperature characterized by solid–state C-13 MAS exchange NMR” Macromoleucles 37, 6460–6471, 2004.
  44. Miyoshi, T.;* Pascui, O.; Reichert, D. “Large-amplitude motions of form III of isotactic poly(4–methyl–1–pentene) crystallites prior to crystal–crystal transformation” Macromolecules 37, 6653–6656, 2004.
  45. Miyoshi, T.;* Pascui, O.; Reichert, D. “Helical Jump Motions in Isotactic Poly(4–methyl–1–pentene) Crystallites Revealed by 1D MAS Exchange NMR Spectroscopy” Macromolecules 35, 7178–7181, 2002.
  46. Miyoshi, T.;* Hayashi, S.; Imashiro, F.; Kaito, A. “Side–chain Conformation and Dynamics for the Form II Polymorph of Isotactic Poly(1–butene) Investigated by High–resolution Solid–state C–13 NMR Spectroscopy” Macromolecules 35, 6060–6063, 2002.
  47. Miyoshi, T.;* Hayashi, S.; Imashiro, F.; Kaito, A. “Chain dynamics, Conformations, and Phase Transformations for Form III Polymorph of Isotactic Poly(1–butene) Investigated by High–resolution Solid–state C–13 NMR Spectroscopy and Molecular Mechanics Calculations” Macromolecules 35, 2624–2632, 2002.
  48. Miyoshi, T.;* Takegoshi, K.; Terao, T. “Effects of Xe Gas on Segmental Motion in a Polymer Blend as Studied by C–13 and Xe–129 High–pressure MAS NMR” Macromolecues 35, 151–154, 2002.
  49. Goto, T.;* Yamazaki, T.; Okajima, I.; Miyoshi, T. “Decomposition of Silane–Crosslinked Polyethylene for Material Recycling by Using Supercritical Methanol” Koubunshi Ronbunshuu 58, 442–457, 2001.
  50. (Graduate and Postdoctoral work)

  51. Miyoshi, T.;* Takegoshi, K.; Terao, T. “Dynamic Alternation between Inter– and Intra–Polymer Hydrogen Bonds in a Polymer Complex as Studied by Solid–state C–13 2D Exchange NMR” Macromolecules 32, 8914–8917, 1999.
  52. Ago, H.;* Tanaka, K.; Yamabe, T.; Miyoshi, T.; Takegoshi, K.; Terao, T. “Structural Analysis of Polyacenic Semiconductor (PAS) Materials with (129) Xenon NMR Measurements” Carbon 35, 1781–1787, 1997.
  53. Miyoshi, T.; Takegoshi, K.; Terao, T.* “C–13 High-Pressure CPMAS NMR Characterization of the Molecular Motion of Polystyrene Plasticized by CO2 Gas” Macromolecules 30, 6582–6585, 1997.
  54. Miyoshi, T.; Takegoshi, K.; Terao, T.* “Xe–129 NMR Study of Free Volume and Phase Separation of the Polystyrene/Poly(vinyl methyl ether) Blend” Polymer 38, 5475–5480, 1997.
  55. Miyoshi, T. ; Takegoshi, K. ; Terao, T.* “A Simple Method for C–13 CPMAS NMR Measurements under High Gas Pressures” Journal of Magnetic Resonance 125, 383–384, 1997.
  56. Miyoshi, T.; Takegoshi, K.; Hikichi, K.* “High Resolution Solid–state C–13 NMR Study of the Interpolymer Interaction, Morphology and Chain Dynamics of the Poly(acrylic acid)/Poly(ethylene oxide) Complex” Polymer 38, 2315–2320, 1997.
  57. Miyoshi, T.; Takegoshi, K.; Hikichi, K.* “High Resolution Solid-state C–13 Nuclear Magnetic Resonance Study of a Polymer Complex: Poly(methacrylic acid)/ Poly(ethylene oxide)” Polymer 37, 11–18, 1996.
  58. Tokita, M.;* Miyoshi, T.; Takegoshi, K.; Hikichi, K. “Probe Diffusion in Gels” Physical Review E 53, 1823–1827, 1996.

* Corresponding author

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