Faculty Information, Institute for Chemical Research, Kyoto University   [ English | Japanese ]


TOSAKA, Masatoshi

Division of Materials Chemistry - Polymer Controlled Synthesis -
Assistant Professor
Doctor Engineering
URL:
E-mail: tosaka@scl.kyoto-u.ac.jp
Tel: 0774-38-3062
Fax: 0774-38-3069
Academic career
    1989.3 Graduated from M. Course, Kyoto University
    2000.1 D. Eng., Kyoto University
    1989.4-1995.3 Employee, Asahi Chemical Industry Co., Ltd.
    1995.4- Instructor, Kyoto University, Institute for Chemical Research
    2001.4-2002.3 Research fellow of Oldenburg University, Germany
    2002.4-2005.3 Visiting Researcher of Hyogo Prefectural Institute of Technology
    2005.9-2006.3 Part-time Lecturer of Ritsumeikan University
Research field
    Polymer Physics
Current research
  1. Structure Analysis of Polymer Crystal
  2. Crystallization of Linear Polymer
  3. Strain-induced Crystallization of Polymer Network
  4. Formation of Dissipative Structures on Oriented Polymer Thin Films
Selected publications
  1. Tosaka, M.; Senoo, K.; Sato, K.; Noda, M.; Ohta, N., Detection of Fast and Slow Crystallization Processes in Instantaneously-Strained Samples of cis-1,4-polyisoprene Polymer 53(3), 864–872 (2012)
  2. Nomoto Y, Matsunaga T, Sakai T, Tosaka M, Shibayama M, Structure and physical properties of dried Tetra-PEG gel Polymer 52, 4123-4128 (2011)
  3. Tosaka M, Toki S, Che J, Rong L, Hsiao B S, Development of internal fine structure in stretched rubber vulcanizates J. Polym. Sci. Part B: Polym. Phys. 49(16), 1157-1162 (2011)
  4. Tosaka M, "Chapter 17 Morphology of Strain-Induced Crystals in Vulcanized Natural Rubber" in "Rubber: Types, Properties and Uses", Gabriel A. Popa Ed., Nova Science Publishers, Inc., pp.563-574 (2011)
  5. Tosaka M, Kohjiya S, Ikeda Y, Toki S, Hsiao B S, Molecular orientation and stress relaxation during strain-induced crystallization of vulcanized natural rubber Polym. J. 42, 474-481 (2010)
  6. Tosaka M, Yamaguchi K, Tsuji M, Latent orientation in the skin layer of electrospun isotactic polystyrene ultrafine fibers Polymer 51, 547-553 (2010)
  7. Tosaka M, Birefringence Study on Molecular Orientation of Natural Rubber During Strain-Induced Crystallization 高分子 58, 726 (2009)
  8. Tosaka M, A Route for the Thermodynamic Description of Strain-Induced Crystallization in Sulfur-Cured Natural Rubber Macromolecules 42, 6166-6174 (2009).
  9. Ikeda Y, Yasuda Y, Hijikata K, Tosaka M, Kohjiya S, Comparative Study on Strain-Induced Crystallization Behavior of Peroxide-Crosslinked and Sulfur-Crosslinked Natural Rubber Macromolecules 41(15), 5876-5884 (2008)
  10. Tosaka M, Strain-Induced Crystallization of Crosslinked Natural Rubber As Revealed by X-ray Diffraction Using Synchrotron Radiation Polymer J. 39(12), 1207-1220 (2007).
  11. Ikeda Y, Kato A, Shimanuki J, Kohjiya S, Tosaka M, Poompradub S, Toki S, Hsiao B S, Nano-Structural Elucidation In Carbon Black Loaded NR Vulcanizate By 3D-TEM And In Situ WAXD Measurements Rubber Chem. Technol. 80 (2), 251-264 (2007)
  12. Kohjiya S, Tosaka M, Furutani M, Ikeda Y, Toki S, Hsiao B S, Role of Stearic Acid in the Strain-Induced Crystallization of Crosslinked Natural Rubber and Synthetic cis-1,4-Polyisoprene Polymer 48(13), 3801-3808 (2007)
  13. Tosaka M, Senoo K, Kohjiya S, Ikeda Y, Crystallization of Stretched Network Chains in Cross-Linked Natural Rubber J. Appl. Phys 101, [84909-1]-[84909-8] (2007)
  14. Ikeda Y, Yasuda Y, Makino S, Yamamoto S, Tosaka M, Senoo K, Kohjiya S, Strain-induced crystallization of peroxide-crosslinked natural rubber Polymer 48(5), 1171-1175 (2007)
  15. Tosaka M, Tsuji M, Kohjiya S, Nagayama K, Self-Assembly of Nano-Sized Arrays on Highly Oriented Thin Films of Poly(tetrafluoroethylene) Mater. Sci. Forum 539-543, 3525-3527 (2007)
  16. Toki S, Hsiao B S, Kohjiya S, Tosaka M, Tsou A H, Datta S, Synchrotron X-Ray Studies of Vulcanized Rubbers and Thermoplastic Elastomers Rubber Chem. Technol. 79(3), 460-488 (2006)
  17. Tosaka M, Kawakami D, Senoo K, Kohjiya S, Ikeda Y, Toki S, ,Hsiao BS, Crystallization and stress relaxation in highly-stretched samples of natural rubber and its synthetic analogue. Macromolecules 39(15), 5100-5105 (2006)
  18. Tosaka M, Tsuji M, Ogawa T, Kitano H, Nakano K, Kohjiya S, Danev R, Nagayama K, Self-assembly of nano-sized arrays on highly oriented thin films of poly(tetrafluoroethylene) Polymer 47(4), 951-955 (2006)
  19. Tosaka M, Danev R, Nagayama K, Application of Phase Contrast Transmission Microscopic Methods to Polymer Materials Macromolecules 38(19), 7884-7886 (2005)
  20. Kojima M, Tosaka M, Funami E, Nitta K, Ohshima M, Kohjiya S, Phase behavior of crosslinked polyisoprene rubber and supercritical carbon dioxide J. Supercrit. Fluids 35(3), 175-181 (2005)
  21. Toki S, Sics I,Hsiao B S, Tosaka M, Poompradub S, Ikeda Y, Kohjiya S, Probing the Nature of Strain-Induced Crystallization in Polyisoprene Rubber by Combined Thermomechanical and In Situ X-ray Diffraction Techniques Macromolecules 38 (16), 7064-7073 (2005).
  22. Tosaka M, Murakami S, Poompradub S, Kohjiya S, Ikeda Y, Toki S, Sics I, Hsiao B S, Orientation and crystallization of natural rubber network as revealed by WAXD using synchrotron radiation National Synchrotron Light Source 2004 Activity Report, p. 2-92 - 2-93 (2005).
  23. Poompradub S, Tosaka M, Kohjiya S, Ikeda Y, Toki S, Sics I, Hsiao B S, Mechanism of strain-induced crystallization in filled and unfilled natural rubber vulcanizates J. Appl. Phys. 97, 103529-1 - 103529-9 (2005).
  24. Kojima M, Tosaka M, Ikeda Y, Kohjiya S, Devulcanization of Carbon Black Filled Natural Rubber by using Supercritical Carbon Dioxide J. Appl. Polym. Sci. 95, 137-143 (2005)
  25. Hirano K, Suzuki K, Nakano K, Tosaka M, Phase Separation Structure in the Polymer Blend of Fluorocarbon Elastomer and Hydrogenated Nitrile Rubber J. Appl. Polym. Sci. 95, 149-156 (2005)
  26. Tosaka M, Kohjiya S, Murakami S, Poompradub S, Ikeda Y, Toki S, Sics I, Hsiao B, Effect of network-chain length on strain-induced crystallization of NR and IR vulcanizates Rubber Chem. Technol. 77, 711-723 (2004)
  27. Toki S, Sics I, Ran S, Liu L, Hsiao B S, Murakami S, Tosaka M, Kohjiya S, Poompradub S, Ikeda Y, Tsou A H, Strain-induced molecular orientation and crystallization in natural and synthetic rubbers under uniaxial deformation by in-situ synchrotron X-ray study Rubber Chem. Technol. 37, 317-335 (2004).
  28. Tosaka M, Murakami S, Poompradub S, Kohjiya S, Ikeda Y, Toki S, Sics I, Hsiao B S, Orientation and crystallization of natural rubber network as revealed by WAXD using synchrotron radiation Macromolecules 37, 3299-3309 (2004).
  29. Toki S, Sics I, Hsiao B, Murakami S, Tosaka M, Poompradub S, Kohjiya S, Ikeda Y, Structural Developments in Synthetic Rubbers during Uniaxial Deformation by In Situ Synchrotron X-Ray Diffraction J. Polym. Sci., Part B: Polym. Phys. 42, 956-964 (2004)
  30. Poompradub S, Tosaka M, Kohjiya S, Ikeda Y, Toki S, Sics I, Hsiao B, Lattice Deformation of Strain-induced Crystallites in Carbon-filled Natural Rubber Chem. Lett. 33, 220-221 (2004).
  31. Kojima M, Tosaka M, Ikeda Y, Chemical recycling of sulfur-cured natural rubber using supercritical carbon dioxide Green Chem. 6, 84-89 (2004).
  32. Udal'tsov A V, Tosaka M, Kaupp G, Microscopy of Large-Scale Porphyrin Aggregates Formed from Protonated TPP Dimers in Water-Organic Solutions J. Mol. Struct. 660, 15-23 (2003).
  33. Kojima M, Ogawa K, Mizoshima H, Tosaka M, Kohjiya S, Ikeda Y, Devulcanization of Sulfur-Cured Isoprene Rubber in Supercritical Carbon Dioxide Rubber Chem. Technol. 76, 957-968 (2003).
  34. Murakami K, Iio S, Ikeda Y, Ito H, Tosaka M, Kohjiya S, Effect of silane-coupling agent on natural rubber filled with silica generated in situ J. Mater. Sci. 38, 1447-1455 (2003)
  35. Tosaka M, Endo Y, Tsuji M, Kohjiya S, Stacking Faults and Growth of Syndiotactic Polypropylene Crystals J. Macromol. Sci., Phis. B42, 559-567 (2003)
  36. Bedia E, Paglicawan M, Bernas C, Bernardo S, Tosaka M, Kohjiya S, Natural weathering of polypropylene in a tropical zone J. Appl. Polym. Sci. 87, 931-938 (2003)
  37. Tosaka M, Kaupp G, Nanoindentation of Uniaxially Oriented Poly(tetrafluoroethylene) Thin Film Kobunshi Ronbunshu 59, 665-668 (2002)
  38. Bedia E, Tsuji M, Tosaka M, Ohara M, Kohjiya S, Morphologies of melt-crystallized thin films of nylon-6, nylon-6,6, and their blends as revealed by transmission electron microscopy J. Macromol. Sci., Phis. B40, 1079-1096 (2001)
  39. Tosaka M, Endo Y, Murakami S, Tsuji M, Kohjiya S, Ogawa T, Isoda S, High-Resolution Electron Microscopy of Lamellar Crystals of Syndiotacitc Polypropylene Sen-i Gakkaishi 57, 244-246 (2001)
  40. Senoo K, Endo K, Tosaka M, Murakami S, Kohjiya S, Polymorphic behavior of syndiotactic polystyrene-based graft copolymers with polystyrene and polyisoprene side chains Macromolecules 34, 1267-1273 (2001)
  41. Shimizu T, Tosaka M, Tsuji M, Kohjiya S, TEM Observation of Natural Rubber Thin Films Crystallized under Molecular Orientation Rubber Chem. Technol. 73, 926-936 (2000)
  42. Tosaka M, Kamijo T, Tsuji M, Kohjiya S, Ogawa T, Isoda S, Kobayashi T, High-Resolution Transmission Electron Microscopy of Crystal Transformation in Solution-Grown Lamellae of Isotactic Polybutene-1 Macromolecules 33, 9666-9672 (2000)
  43. Senoo K, Endo K, Murakami S, Tosaka M, Crystallization of Newly Synthesized Syndiotactic Graft Copolymers Chem. Let. , 278-279 (2000)
  44. Tosaka M, Hamada N, Yamakawa M, Tsuji M, Kohjiya S, Molecular Packing in the New Unit Cell of Poly(p-hydroxybenzoic acid) Whisker Crystal Comput. Theor. Polym. Sci. 10, 355-364 (2000)
  45. Tosaka M, Yamakawa M, Tsuji M, Murakami S, Kohjiya S, Structural Studies on Polymer Whiskers by Transmission Electron Microscopy. II. Unit Cell of Poly(p-hydroxybenzoic acid) Whisker Crystal at Room Temperature. J. Polym. Sci., Part B: Polym. Phys. 37, 2456-2462 (1999)
  46. Tosaka M, Yamakawa M, Tsuji M, Kohjiya S, Ogawa T, Isoda S, Kobayashi T, Structural Studies on Polymer Whiskers by Transmission Electron Microscopy. I. High-resolution Observation Microsc. Res. Tech. 46, 325-333 (1999)
  47. Tosaka M, High-resolution Transmission Electron Microscopy of Crystalline Polymers Rec. Res. Develop. Macromol. Res. 4, 45-56 (1999)
  48. Tosaka M, Tsuji M, Kohjiya S, Cartier L, Lotz B, Crystallization of Syndiotactic Polystyrene in β-form. 4: Crystal Structure of Melt-grown Modification Macromolecules 32, 4905-4911 (1999)
  49. Tosaka M, Tsuji M, Kohjiya S, High-resolution Transmission Electron Microscopy of Polymer Crystals Mat. Sci. Res. Int. 4, 79-85 (1998)
  50. Tosaka M, Tsuji M, Cartier L, Lotz B, Kohjiya S, Ogawa T, Isoda S, Kobayashi T, High-resolution TEM of the melt-crystallized modification of syndiotactic polystyrene Polymer 39, 5273-5275 (1998)
  51. Tosaka M, Hamada N, Tsuji M, Kohjiya S, Crystallization of Syndiotactic Polystyrene in β-form. 3: Energetic Analysis of the Incorporation Mechanism of Stacking Faults into the Crystal. Macromolecules 30, 6592-6596 (1997)
  52. Hamada N, Tosaka M, Tsuji M, Kohjiya S, Katayama K, Crystallization of Syndiotactic Polystyrene in β-form. 2: Quantification of Stacking Faults in the Solution-Grown Single Crystals Macromolecules 30, 6888-6892 (1997)
  53. Fujita M, Hamada N, Tosaka M, Tsuji M, Kohjiya S, A TEM Study on Polyoxymethylene Rod-like Crystals Grown Epitaxially on NaCl J. Macromol. Sci., Phis. B36, 681-687 (1997)
  54. Tosaka M, Hamada N, Tsuji M, Kohjiya S, Ogawa T, Isoda S, Kobayashi T, Crystallization of Syndiotactic Polystyrene in β-form. 1. Positional Identification of Stacking Faults in the Solution Grown Single Crystals. Macromolecules 30, 4132-4136 (1997)
  55. Tosaka M, Epitaxial growth of polymers on the friction-transfered oriented thin film Kaigai Kohbunshi Kenkyu 42, 9-10 (1996)
  56. Tsuji M, Okihara T, Tosaka M, Kawaguchi A, Katayama K, Stacking Faults in Single Crystals of Syndiotactic Polystyrene MSA Bull. 23, 57-65 (1993)
  57. Tsuji M, Tosaka M, Kawaguchi A, Katayama K, Iwatsuki M, High-resolution Images of Uniaxially Oriented Thin Films of Polyethylene and Poly(4-methyl-1-pentene) with a Superconducting Cryo-TEM Sen-i Gakkaishi 48, 384-388 (1992)
  58. Tsuji M, Tosaka M, Kawaguchi A, Katayama K, Iwatsuki M, High-resolution Observation of Polymer Single Crystals with a Superconducting Cryo-TEM Bull. Inst. Chem. Res., Kyoto Univ. 69, 117-126 (1991)

Update: Apr 02,2012