SASAKI Takashi

FacultyMaterials Science and Engineering
Teacher OrganizationMaterials Science and Engineering
Education and
 Research Organization
Faculty of Engineering /Graduate School of Engineering
Last Updated: 19/07/23 19:02

Researcher Profile & Settings


    SASAKI Takashi


  •  Materials Science and Engineering Professor


  • 1988Kyoto University 高分子化学
  • 1983Kyoto University

Research Activities

Published Papers

  • Glass transition of a polystyrene surface as detected via two-dimensional diffusion of Au atoms during physical vapor deposition
    T. Sasaki, Y. Ito, T. Sasai, S. Irie
    Polymer 178 121577-(7) Sep.  2019 Refereed
  • Segmental dynamics of free-standing and supported polymer thin films predicted from a surface-controlled model
    T. Sasaki, T. Nakane, A. Sato
    Polymer 172 265-271 Apr.  2019 Refereed
  • Glass transition at the polystyrene/polyethylene glycol interface observed via contact angle measurements
    T. Sasaki, K. Hiraki, A. Athirah, K. Matsuta, N. Takeuchi
    Polymer Journal 51 481-488 Jan.  2019 Refereed
  • Rapid crystallization and mesophase formation of poly(L-lactic acid) during precipitation from a solution
    M. Syazwan, T. Sasaki
    e-Polymers 18(4) 331-337 Feb.  2018 Refereed
  • Cooperativity of dynamics in supercooled polymeric materials and its temperature dependence predicted from a surface controlled model
    A. Sato, T.Sasaki
    European Polymer Journal 99 485-494 Jan.  2018 Refereed
  • Interfacial effects on the spherulitic morphology of isotactic polystyrene thin films on liquid substrates
    T. Sasaki, M. Nakagiri and S. Irie
    Advances in Materials Science and Engineering 2016 4849798-(8) 2016 Refereed
  • Correlation between fragility and cooperativity in segmental dynamics of glass-forming para-substituted polystyrenes
    T. Sasaki, M. Ichimura, S. Irie
    POLYMER JOURNAL 47(10) 687-694 Oct.  2015 Refereed
  • Preparation and Drug-Release Kinetics of Porous Poly(L-lactic acid)/Rifampicin Blend Particles
    T.Sasaki, H. Matsuura, K. Tanaka
    ISRN Polymer Science 2014 128154-(6) Feb.  2014 Refereed
  • Influence of alpha-cyclodextrin and casting rate on the crystallization of poly(L-lactide) from a PLLA solution
    A. Saga, T.Sasaki, K.Sakurai
    E-POLYMERS 14(2) 151-157 2014 Refereed
  • Melting of poly(ε-caprolactone) studied by step-heating calorimetry
     111 717-724 2013 Refereed
  • Preparation and glass transition of crosslinked poly(vinyl acetate) thin shells on the surface of a calcium carbonate core
    T.Sasaki, K. Suzuki, S. Yonezawa, S.Irie, K.Sakurai
     43(11) 881-886 Nov.  2011 Refereed
  • Origin of enhanced cold crystallization rate for freeze-dried poly(L-lactide) from solutions
    T.Sasaki, D. Morino, N. Tabata
     51(9) 1858-1865 Sep.  2011 Refereed
  • Glass transition properties of PMMA thin shells deposited on rodlike calcium carbonate particles
    T.Sasaki, R.Kuroda, M.Teramoto, S.Yonezawa, H.Tsuji, K.Sakurai, S.Irie
     43(5) 464-470 May  2011 Refereed
  • Chitosan derivatives / calcium carbonate composite capsules prepared by the layer-by-layer deposition method II Stabilization of the shell by crosslinking
    T.Sasaki, H. Mizuuchi, K.Sakurai
     2011 476752 2011 Refereed
  • Morphology and release kinetics of protein-loaded porous poly(L-lactic acid) spheres prepared by freeze-drying technique
    T.Sasaki, K. Tanaka, D. Morino, K.Sakurai
     2011 490567 2011 Refereed
  • Freeze-drying improves crystallization of porous biodegradable polymers
    T.Sasaki, D. Morino, N. Tabata
     2011 Not refereed
  • Excess reversing heat capacity during quasi-isothermal crystallization in poly(L-lactide) melt
    T.Sasaki, H.Sakurai
     57 101-110 Mar.  2009 Not refereed
  • Formation of porous spherulites of poly(L-lactide) grown from solutions
    Takashi Sasaki, Ryuya Asakawa, Kensuke Sakurai
    Polymer Journal 41(9) 787-791 2009 Refereed
  • Interactions between Spiropyrans and Room-Temperature Ionic Liquids: Photochromism and Solvatochromis
    Yusong Wu, T.Sasaki, K.Kono, T.Seo, K.Sakurai
     112 7530-7536 May  2008 Refereed
  • Chitosan derivatives / calcium carbonate composite capsules prepared by the layer-by-layer deposition method
    Takashi Sasaki, Misato Shimizu, Yusong Wu, Kensuke Sakurai
     2008 185632 Mar.  2008 Refereed
  • A novel biomass-ionic liquid platform for the utilization of native chitin
    Yusong Wu, T.Sasaki, S.Irie, K.Sakurai
     49 2321-2327 Mar.  2008 Refereed
  • Glass transition and its characteristic length for thin crosslinked polystyrene shells of rodlike capsules
    Takashi Sasaki, Manabu Misu, Takayuki Shimada, Mitsuhiro Teramoto
     46(19) 2116-2125 2008 Refereed
  • Fabrication and structural charaterization of the Langmuir-Blodgett films from a new chitosan derivatives containing cinnamate chromophores
    Yusong Wu, Kenji Hisada, Shiro Maeda, Takashi Sasaki, Kensuke Sakurai
     68 766-772 Apr.  2007 Refereed
  • Glass transition of crosslinked polystyrene shells formed on the surface of calcium carbonate whisker
    T.Sasaki, S.Kawagoe, H.Mitsuya, S.Irie, K.Sakurai
    Journal of Polymer Science Part B: Polymer Physics 44(17) 2475-2485 Jul.  2006 Refereed
  • Layered structures of hydrophobically modified chitosan derivatives
    Yusong Wu, T.Seo, T.Sasaki, S.Irie, K.Sakurai
     63 493-499 Jun.  2006 Refereed
  • Effect of crosslink on the characteristic length of glass transition of network polymers
    T.Sasaki, T.Uchida, K.Sakurai
    Journal of Polymer Science Part B: Polymer Physics 44(14) 1958-1966 Jun.  2006 Refereed
  • Mechanical properties of fiber reinforced stryrene-butadiene rubbers using surface-modified UHMWPE fibers under EB irradiation
    Y. Kondo, K. Miyazaki, Y. Yamaguchi, T.Sasaki, S.Irie, K.Sakurai
     42 1008-1014 Apr.  2006 Refereed
  • Mechanical properties of fiber reinforced styrene-butadiene rubbers using surface-modified UHMWPE fibers under EB irradiation
    Y. Kondo, K. Miyazaki, Y. Yamaguchi, T. Sasaki, K. Sakurai
     42 1008-1014 Jan.  2006 Refereed
  • Thermal properties of poly(L-lactide) (PLLA) freeze-dried under different conditions
    T.Sasaki, N.Yamauchi, S.Morita, S.Irie, K.Sakurai
     27P1G2-033a Jul.  2005 Not refereed
  • Core/shell and hollow polymeric capsules prepared from calcium carbonate whisker
    T.Sasaki, T. Kitagawa, S. Sato, S.Irie, K.Sakurai
     37(6) 434-438 Jun.  2005 Refereed
  • Circular Dichromism Induced by the Helical Conformations of Acylated Chitosan Derivatives Bearing Cinnamate Chromophores
    Y.Wu, T.Seo, S.Maeda, T.Sasaki, S.Irie, K.Sakurai
     43 1354-1364 May  2005 Refereed
  • Differential scanning calorimetry study on thermal behaviors of freeze-dried poly(L-lactide) from dilute solutions
    T.Sasaki, N.Yamauchi, S.Irie, K.Sakurai
     43 115-124 Jan.  2005 Refereed
  • Conformational properties of naphthoyl chitosan in solutions and film
    Yusong Wu, T.Seo, S.Maeda, Yanming Dong, T.Sasaki, S.Irie, K.Sakurai
     Ⅶ-47 67 Sep.  2004
  • Spectroscopic Studies of the Conformational Properties of Naphthoyl Chitosan in Dilute Solutions
    Yusong Wu, T.Seo, S.Maeda, Yanming Dong, T.Sasaki, S.Irie, K.Sakurai
     42 2747-2758 Aug.  2004 Refereed
  • Ultrahigh-Molecular-Weight-Polyethylene-Fiber Surface Treatment by Electron-Beam-Irradiation-Induced Graft Polymerization and lt’s-Effect on Adhesion in a Styrene-Butadiene-Rubber Matrix
    K. Sakurai, Y. Kondo, 宮﨑 孝司, T. Okamoto, T. Sasaki
     42 2595-2603 May  2004 Refereed
  • Ultrahigh-Molecular-Weight-Polyethylene-Fiber Surface Treatment by Electron-Beam-Irradiation-Induced Graft Polymerization and Its Effect on Adhesion in a Styrene-Butadiene Rubber Matrix
    K.Sakurai, Y.Kondo, K.Miyazaki, T.Okamoto, S.Irie, T.Sasaki
     42 2595-2603 Apr.  2004 Refereed
  • Preparation of Benzoylchitosans and Their Chiroptical Properties in Dilute Solutions
    Yusong Wu, T.Seo, S.Maeda, T.Sasaki, S.Irie, K.Sakurai
     42 4107-4115 Jan.  2004 Refereed
  • Multiple melting behavior of syndiotactic 1,2-polybutadiene
    T.Sasaki, H.Sunago, T.Hoshikawa
     43 629-638 2003 Refereed
  • Glass transition of small polystyrene spheres in aqueous suspensions
    T.Sasaki, A.Shimizu, T.H.Mourey, C.T.Thurau, M.D.Ediger
     119 8730-8735 2003 Refereed
  • Photophysics of novel 2,6-disubstituted benzobisthiazoles possessing chromophoric groups
    T.Sasaki, T.Inoue, Y.Komori, S.Irie, K.Sakurai, K.Tsubakiyama
     5 1381-1385 2003 Refereed
  • Epitaxial Growth of N, N’-di(2-anthryl)pyromellitimide on Alkali Halides
    N.Moriyama, S.Irie, T.Sasaki, K.Sakurai
     41 5682-5685 2002 Refereed
  • Crystal growth and evaporation of a triphenylboroxin thin film
    S.Irie, A.Sakamoto, S.Ukeda, Y.Tokunaga, K.Isa, T.Sasaki, K.Sakurai
     237-239 2065-2070 2002 Refereed
  • Crystallization of poly(ethylene oxide) from solutions of different solvents
    T.Sasaki, A.Miyazaki, S.Sugiura, K.Okada
     34(11) 799-805 2002 Refereed
  • Primary nucleation rate and radial growth rate of poly(ethylene oxide) spherulite in viscous solutions
    T.Sasaki, Y.Yamamoto, T.Takahashi
     32 263-268 2000 Refereed
  • Structure of Freeze-Dried Atactic Polystyrene from Dilute Solutions
    T.Sasaki, M.Tanaka, T.Takahashi
     39 3753-3757 1998 Refereed
  • Spherulitic Growth of Poly(ethylene oxide) from Viscous Solution
    T.Sasaki, Y.Yamamoto, T.Takahashi
     30 868-873 1998 Refereed
  • Properties of Porous Poly (L‐Lactic Acid) and its Application as a Drug Carrier
    Sen'i Gakkaishi 72(4) 215-215 2016 Not refereed
  • Spiral crack patterns observed for melt-grown spherulites of poly(L-lactic acid) upon quenching.
    Matsuda Futoshi;Sobajima Takamasa;Irie Satoshi;Sasaki Takashi
    The European physical journal. E, Soft matter 39(4) 41-48 2016 Refereed
    :In this paper, we demonstrate the characteristic spiral cracking that appears on the surface of melt-grown poly(L-lactic acid) (PLLA) spherulites with relatively large sizes (greater than 0.4mm in diameter). The crack occurs via thermal shrinkage upon quenching after crystallization. Although concentric cracks on polymer spherulites have been found to occur in quite a few studies, spiral crack patterns have never been reported so far. The present spiral crack was observed for thick spherulites (> 10 μm), whereas the concentric crack pattern was frequently observed for thin spherulites (typically 5 μm). The present PLLA spherulites exhibited a non-banded structure with no apparent structural periodicity at least on the scale of the spiral pitch, and thus no direct correlation between the crack pattern and the spherulitic structure was suggested. The spiral was revealed to be largely Archimedean of which the spiral pitch increases with an increase in the thickness of the spherulite. This may be interpreted in terms of a classical mechanical model for a thin layer with no delamination from the substrate.

Conference Activities & Talks

  • Thickness dependences of the glass transition temperature and the fragility of polystyrene thin films predicted by a surface-controlled cooperative rearranging region model
     May  2019
  • Adsorption of polymers on silica surfaces and preparation of core/shell particles
     May  2019
  • AC nano-calorimetry study of the crystallization of poly(L-lactic acid) thin films
    T. Sasaki, K. Kamiya, S. Katano
    8th International and 10th Japan-China Joint Symposium on Calorimetry and thermal analysis Nov.  2017
  • Effects of Substituents on Polymer Glass Transition Dynamics
    T. Sasaki
    The EMN Polymer Meeting 2017 Mar.  2017
  • Crystallization of poly(L-lactic acid) at different interfaces
    F.Matsuda, S.Irie, T.Sasaki
     Dec.  2014
  • Periodic structure on thin film of polyvinylether triblock copolymer
    Satoshi Irie, Madoka Ueno, Takashi Sasaki, Tsuguto Imaeda, Michio Urushisaki, Toshikazu Sakaguchi, Tamotsu Hashimoto
     Sep.  2014