Dielectric Relaxation Behavior of Halobenzene Confined in the δ‐Phase of Syndiotactic Polystyrene

Osamu Urakawa, Hideo Kobayashi, Ryosai Inoue, Fumitoshi Kaneko, Tadashi Inoue

Macromolecular Symposia　Vol. 408　No. 1　2023/04/13　Research paper (scientific journal)

Viscoelastic Effects on Molecular Dynamics of Dielectric Probes in Polymer Matrices

Osamu Urakawa, Shogo Nobukawa, Tadashi Inoue

Nihon Reoroji Gakkaishi　Vol. 51　No. 1　p. 9-17　2023/02/15　Research paper (scientific journal)

Solvent effects of N,N-dimethylformamide and methanol on mass spectrometry imaging by tapping-mode scanning probe electrospray ionization

Yoichi Otsuka, Nijiho Ote, Mengze Sun, Shuichi Shimma, Osamu Urakawa, Shinichi Yamaguchi, Tomoya Kudo, Michisato Toyoda

The Analyst　Vol. 148　No. 6　p. 1275-1284　2023　Research paper (scientific journal)

Preparation of dual-cross network polymers by the knitting method and evaluation of their mechanical properties

Yusaku Kawai, Junsu Park, Yoshiki Ishii, Osamu Urakawa, Shunsuke Murayama, Ryohei Ikura, Motofumi Osaki, Yuka Ikemoto, Hiroyasu Yamaguchi, Akira Harada, Tadashi Inoue, Hitoshi Washizu, Go Matsuba, Yoshinori Takashima

NPG ASIA MATERIALS　Vol. 14　No. 1　2022/12　Research paper (scientific journal)

Evaluation of Dynamic Viscosity in the 10 MHz Range Using a General-Purpose Quartz Crystal Microbalance

Ryota Yoshizawa, Osamu Urakawa, Tadashi Inoue

Nihon Reoroji Gakkaishi　Vol. 50　No. 4　p. 333-337　2022/09/15　Research paper (scientific journal)

Rheology of Tightly Entangled DNA Aqueous Solutions

Masumi Kinoshita, Osamu Urakawa, Tadashi Inoue

Nihon Reoroji Gakkaishi　Vol. 50　No. 2　p. 225-233　2022/04/15　Research paper (scientific journal)

Multi-energy dissipation mechanisms in supramolecular hydrogels with fast and slow relaxation modes

Subaru Konishi, Junsu Park, Osamu Urakawa, Motofumi Osaki, Hiroyasu Yamaguchi, Akira Harada, Tadashi Inoue, Go Matsuba, Yoshinori Takashima

Soft Matter　Vol. 18　No. 38　p. 7369-7379　2022　Research paper (scientific journal)

Linear Viscoelasticity and Birefringence of Poly-γ-Benzyl-<scp>l</scp>-Glutamate Solutions

Tadashi Inoue, Naomi Furusawa, Osamu Urakawa

Macromolecules　Vol. 54　No. 24　p. 11360-11371　2021/12/28　Research paper (scientific journal)

Phase equilibrium and dielectric relaxation in mixture of 5CB with dilute dimethyl phthalate: effect of coupling between orientation and composition fluctuations on molecular dynamics in isotropic one-phase state.

Ryoko Shimada, Osamu Urakawa, Tadashi Inoue, Hiroshi Watanabe

Soft matter　Vol. 17　No. 25　p. 6259-6272　2021/06/30　Research paper (scientific journal)

Rheological Behavior of Hydrogen Bonding Miscible Blend: High Molecular Weight Poly(2-vinyl pyridine) and Low Molecular Weight Poly(4-vinyl phenol)

Osamu Urakawa, Ayaka Yasue, Tadashi Inoue

Nihon Reoroji Gakkaishi　Vol. 49　No. 3　p. 155-162　2021/06/15　Research paper (scientific journal)

Rheological Scaling of Ionic Liquid-Based Polyelectrolytes in the Semidilute Unentangled Regime from Low to High Salt Concentrations

Atsushi Matsumoto, Ryota Yoshizawa, Osamu Urakawa, Tadashi Inoue, Amy Q. Shen

MACROMOLECULES　Vol. 54　No. 12　p. 5648-5661　2021/06　Research paper (scientific journal)

Viscoelastic Relaxation of Polymerized Ionic Liquid and Lithium Salt Mixtures: Effect of Salt Concentration.

Arisa Yokokoji, Wakana Kitayama, Kamonthira Wichai, Osamu Urakawa, Atsushi Matsumoto, Visit Vao-Soongnern, Tadashi Inoue

Polymers　Vol. 13　No. 11　2021/05/28　Research paper (scientific journal)

Dynamics of the Topological Network Formed by Movable Crosslinks: Effect of Sliding Motion on Dielectric and Viscoelastic Relaxation Behavior

Yu Kashiwagi, Osamu Urakawa, Sheng Zhao, Yoshinori Takashima, Akira Harada, Tadashi Inoue

MACROMOLECULES　Vol. 54　No. 7　p. 3321-3333　2021/04　Research paper (scientific journal)

Rheo-Optical Study on the Viscoelastic Relaxation Modes of a Microgel Particle Suspension around the Liquid-Solid Transition Regime

Li Shangwei, Osamu Urakawa, Tadashi Inoue

MACROMOLECULES　Vol. 54　No. 7　p. 3270-3280　2021/04　Research paper (scientific journal)

Design and mechanical properties of supramolecular polymeric materials based on host–guest interactions: the relation between relaxation time and fracture energy

Subaru Konishi, Yu Kashiwagi, Go Watanabe, Motofumi Osaki, Takuya Katashima, Osamu Urakawa, Tadashi Inoue, Hiroyasu Yamaguchi, Akira Harada, Yoshinori Takashima

Polymer Chemistry　Vol. 11　No. 42　p. 6811-6820　2020/10　Research paper (scientific journal)

Rheo-Optical and Dielectric Study on Dynamics of Bottlebrush-like Polymacromonomer Consisting of a Polyisoprene Main Chain and Polystyrene Side Chains

Hiroshi Iwawaki, Osamu Urakawa, Tadashi Inoue, Yo Nakamura, Yumi Matsumiya, Hiroshi Watanabe

MACROMOLECULES　Vol. 53　No. 16　p. 7096-7106　2020/08　Research paper (scientific journal)

Effect of Head-to-Head Association/Dissociation on Viscoelastic and Dielectric Relaxation of Entangled Linear Polyisoprene: An Experimental Test

Yumi Matsumiya, Hiroshi Watanabe, Osamu Urakawa, Tadashi Inoue, Youngdon Kwon

MACROMOLECULES　Vol. 53　No. 3　p. 1070-1083　2020/02　Research paper (scientific journal)

Rheological Test for the Homogeneity of Aqueous Blends of Associative Polymer Network and Entangled Linear Polymer

Takamitsu Chiba, Takuya Katashima, Osamu Urakawa, Tadashi Inoue

NIHON REOROJI GAKKAISHI　Vol. 48　No. 1　p. 49-54　2020　Research paper (scientific journal)

Glass Transition Behaviors of Poly (Vinyl Pyridine)/Poly (Vinyl Phenol) Revisited

Osamu Urakawa, Ayaka Yasue

POLYMERS　Vol. 11　No. 7　p. 1153-1163　2019/07　Research paper (scientific journal)

Relationships between Diffusion and Viscoelasticity of Associative Polymer Networks

Miyu Ohnishi, Takuya Katashima, Masaki Nakahata, Osamu Urakawa

NIHON REOROJI GAKKAISHI　Vol. 47　No. 4　p. 133-142　2019　Research paper (scientific journal)

Anisotropic Dynamics of Benzonitrile Confined in delta and epsilon Clathrate Phases of Syndiotactic Polystyrene

Hideo Kobayashi, Sho Akazawa, Osamu Urakawa, Fumitoshi Kaneko, Tadashi Inoue

MACROMOLECULES　Vol. 51　No. 21　p. 8611-8619　2018/11　Research paper (scientific journal)

Introducing Large Counteranions Enhances the Elastic Modulus of Imidazolium-Based Polymerized Ionic Liquids

Atsushi Matsumoto, Ciprian Iacob, Takeru Noda, Osamu Urakawa, James Runt, Tadashi Inoue

MACROMOLECULES　Vol. 51　No. 11　p. 4129-4142　2018/06　Research paper (scientific journal)

Relationship between global and segmental dynamics of poly(butylene oxide) studied by broadband dielectric spectroscopy

Osamu Urakawa, Minoru Yamane, Shota Tomie, Tadashi Inoue, Toshiyuki Shikata, Keiichiro Adachi

The Journal of Chemical Physics　Vol. 148　No. 3　p. 034904-034904　2018/01/21　Research paper (scientific journal)

Rheological Behavior of Weakly Associated Polymers

Osamu Urakawa, Hiroyoshi Ikuta, Satoshi Maji, Tadashi Inoue

NIHON REOROJI GAKKAISHI　Vol. 46　No. 3　p. 131-137　2018　Research paper (scientific journal)

Relationship between Global and Segmental Dynamics of Type-A Polymer Examined by Broadband Dielectric Spectroscopy

O. Urakawa, M. Yamane, S. Tomie, T. Inoue, T. Shikata, K. Adachi

Journal of Chemical Physics　Vol. 148　No. 034904　p. 1-12　2018/01　Research paper (scientific journal)

Polymerized Ionic Liquids: Correlation of Ionic Conductivity with Nanoscale Morphology and Counterion Volume

Ciprian Iacob, Atsushi Matsumoto, Marissa Brennan, Hongjun Liu, Stephen J. Paddison, Osamu Urakawa, Tadashi Inoue, Joshua Sangoro, James Runt

ACS MACRO LETTERS　Vol. 6　No. 9　p. 941-946　2017/09　Research paper (scientific journal)

Memory effect in elastic modulus of a hydrogen-bonding polymer network

Osamu Urakawa, Azusa Shimizu, Miho Fujita, Shun Tasaka, Tadashi Inoue

POLYMER JOURNAL　Vol. 49　No. 2　2017/02　Research paper (scientific journal)

高分子の耐熱性を向上させる逆可塑剤

浦川理

可塑剤インフォメーション　2016/11　Research paper (scientific journal)

Dynamics of polar aromatic molecules confined in a nanocavity of delta-phase of syndiotactic polystyrene as studied by dielectric spectroscopy

Hideo Kobayashi, Osamu Urakawa, Fumitoshi Kaneko, Tadashi Inoue

CHEMICAL PHYSICS　Vol. 479　p. 122-128　2016/11　Research paper (scientific journal)

Reliability of intrinsic birefringence estimated via the modified stress-optical rule

Yuki Okada, Osamu Urakawa, Tadashi Inoue

POLYMER JOURNAL　Vol. 48　No. 11　p. 1073-1078　2016/11　Research paper (scientific journal)

Experimental Test for Viscoelastic Relaxation of Polyisoprene Undergoing Monofunctional Head-to-Head Association and Dissociation

Yumi Matsumiya, Hiroshi Watanabe, Osamu Urakawa, Tadashi Inoue

MACROMOLECULES　Vol. 49　No. 18　p. 7088-7095　2016/09　Research paper (scientific journal)

Component dynamics in miscible polymer blends

Hiroshi Watanabe, Osamu Urakawa

Functional Polymer Blends: Synthesis, Properties, and Performance　p. 53-126　2016/04/19　Part of collection (book)

Viscoelastic Relaxation of Rouse Chains undergoing Head-to-Head Association and Dissociation: Motional Coupling through Chemical Equilibrium

Hiroshi Watanabe, Yumi Matsumiya, Yuichi Masubuchi, Osamu Urakawa, Tadashi Inoue

MACROMOLECULES　Vol. 48　No. 9　p. 3014-3030　2015/05　Research paper (scientific journal)

Polyaryletherketone

Urakawa, O. Kobayashi, S, Müllen, K., Eds

Encyclopedia of Polymeric Nanomaterials　2015/04

Polyetherimide

Urakawa, O. Kobayashi, S, Müllen, K., Eds

Encyclopedia of Polymeric Nanomaterials　2015/04

Effect of Hydrogen Bonding on the Thermo-Mechanical Properties

Urakawa, O

Polymers　Vol. 64　No. 2　p. 95-96　2015/02　Research paper (scientific journal)

Selective determination of glass transition temperature and vibrational properties at the chain end of polystyrene by Fourier transform infrared measurement in combination with deuterium-labeling

Yohei Miwa, Osamu Urakawa, Shogo Nobukawa, Shoichi Kutsumizu

POLYMER　Vol. 59　p. 194-199　2015/02　Research paper (scientific journal)

Detailed analysis of glass transition temperature on polymer blends with hydrogen bonding

Ayaka Yasue, Yuki Okada, Osamu Urakawa, Tadashi Inoue

Zairyo/Journal of the Society of Materials Science, Japan　Vol. 64　No. 1　p. 43-46　2015/01/01　Research paper (scientific journal)

Dielectric and Viscoelastic Behavior of Star-Branched Polyisoprene: Two Coarse-Grained Length Scales in Dynamic Tube Dilation

Yumi Matsumiya, Yuichi Masubuchi, Tadashi Inoue, Osamu Urakawa, Chen-Yang Liu, Evelyne van Ruymbeke, Hiroshi Watanabe

MACROMOLECULES　Vol. 47　No. 21　p. 7637-7652　2014/11　Research paper (scientific journal)

The structure and viscoelasticity of novolac resins

Satoshi Maji, Osamu Urakawa, Tadashi Inoue

POLYMER JOURNAL　Vol. 46　No. 9　p. 584-591　2014/09　Research paper (scientific journal)

Viscoelastic properties and birefringence of phenolic resins

Satoshi Maji, Osamu Urakawa, Tadashi Inoue

POLYMER JOURNAL　Vol. 46　No. 5　p. 272-276　2014/05　Research paper (scientific journal)

Rapid Stretching Vibration at the Polymer Chain End

Yohei Miwa, Taro Udagawa, Osamu Urakawa, Shogo Nobukawa, Shoichi Kutsumizu

ACS MACRO LETTERS　Vol. 3　No. 2　p. 126-129　2014/02　Research paper (scientific journal)

Reliability of Intrinsic Viscosity Estimated by Single Point Procedure at High Concentrations

Tadashi Inoue, Naoto Oba, Osamu Urakawa

NIHON REOROJI GAKKAISHI　Vol. 42　No. 4　p. 261-264　2014　Research paper (scientific journal)

Dynamics of Polar Low Mass Molecules Encapsulated in the delta-cocrystal of Syndiotactic Polystyrene

Hideo Kobayashi, Osamu Urakawa, Fumitoshi Kaneko, Tadashi Inoue

NIHON REOROJI GAKKAISHI　Vol. 42　No. 1　p. 19-23　2014　Research paper (scientific journal)

Dielectric Relaxation of Monodisperse Linear Polyisoprene: Contribution of Constraint Release

Yumi Matsumiya, Kazuki Kumazawa, Masahiro Nagao, Osamu Urakawa, Hiroshi Watanabe

MACROMOLECULES　Vol. 46　No. 15　p. 6067-6080　2013/08　Research paper (scientific journal)

Dynamics of a Probe Molecule Dissolved in Several Polymer Matrices with Different Side-Chain Structures: Determination of Correlation Length Relevant to Glass Transition

Shogo Nobukawa, Osamu Urakawa, Toshiyuki Shikata, Tadashi Inoue

MACROMOLECULES　Vol. 46　No. 6　p. 2206-2215　2013/03　Research paper (scientific journal)

Dielectric Relaxation of Guest Molecules in a Clathrate Structure of Syndiotactic Polystyrene

Osamu Urakawa, Fumitoshi Kaneko, Hideo Kobayashi

JOURNAL OF PHYSICAL CHEMISTRY B　Vol. 116　No. 49　p. 14461-14469　2012/12　Research paper (scientific journal)

Rheo-Optical Study on Dynamics of Bottlebrush-Like Polymacromonomer Consisting of Polystyrene. II. Side Chain Length Dependence on Dynamical Stiffness of Main Chain

Hiroshi Iwawaki, Osamu Urakawa, Tadashi Inoue, Yo Nakamura

MACROMOLECULES　Vol. 45　No. 11　p. 4801-4808　2012/06　Research paper (scientific journal)

Glass Transition Temperature and beta Relaxation Temperature around Chain End of Polystyrene Determined by Site Specific Spin Labeling

Yohei Miwa, Osamu Urakawa, Akinari Doi, Katsuhiro Yamamoto, Shogo Nobukawa

JOURNAL OF PHYSICAL CHEMISTRY B　Vol. 116　No. 4　p. 1282-1288　2012/02　Research paper (scientific journal)

Cooperative Dynamics in Polystyrene and Low-Mass Molecule Mixtures

Shogo Nobukawa, Osamu Urakawa, Toshiyuki Shikata, Tadashi Inoue

MACROMOLECULES　Vol. 44　No. 20　p. 8324-8332　2011/10　Research paper (scientific journal)

Dielectric and Viscoelastic Investigation of Segmental Dynamics of Polystyrene above Glass Transition Temperature: Cooperative Sequence Length and Relaxation Mode Distribution

Yumi Matsumiya, Akiko Uno, Hiroshi Watanabe, Tadashi Inoue, Osamu Urakawa

MACROMOLECULES　Vol. 44　No. 11　p. 4355-4365　2011/06　Research paper (scientific journal)

Entanglement Dynamics in Miscible Polyisoprene/Poly(p-tert-butylstyrene) Blends

Hiroshi Watanabe, Quan Chen, Yohji Kawasaki, Yumi Matsumiya, Tadashi Inoue, Osamu Urakawa

MACROMOLECULES　Vol. 44　No. 6　p. 1570-1584　2011/03　Research paper (scientific journal)

Miscibility and dynamics of poly (vinyl acetate)/ poly (methyl glycidyl ether) blends

Azusa Shimizu, Nobuharu Kuki, Osamu Urakawa, Tadashi Inoue

Zairyo/Journal of the Society of Materials Science, Japan　Vol. 60　No. 1　p. 19-23　2011/01　Research paper (scientific journal)

Origin of High Segmental Mobility at Chain Ends of Polystyrene

Yohei Miwa, Shigetaka Shimada, Osamu Urakawa, Shogo Nobukawa

MACROMOLECULES　Vol. 43　No. 17　p. 7192-7199　2010/09　Research paper (scientific journal)

Evaluation of Nematic Interaction Parameter between Polymer Segments and Low-Mass Molecules in Mixtures

Shogo Nobukawa, Osamu Urakawa, Toshiyuki Shikata, Tadashi Inoue

MACROMOLECULES　Vol. 43　No. 14　p. 6099-6105　2010/07　Research paper (scientific journal)

Dynamics of Low Mass Molecules Dissolved in Polymers

Osamu Urakawa, Shogo Nobukawa, Toshiyuki Shikata, Tadashi Inoue

NIHON REOROJI GAKKAISHI　Vol. 38　No. 1　p. 41-46　2010　Research paper (scientific journal)

Component dynamics in miscible polymer blends: A review of recent findings

Hiroshi Watanabe, Osamu Urakawa

KOREA-AUSTRALIA RHEOLOGY JOURNAL　Vol. 21　No. 4　p. 235-244　2009/12　Research paper (scientific journal)

Miscibility Control of Polystyrene and 4-Pentyl-4'-cyanobiphenyl Blends by Partial p-Hydroxymethylation

Shogo NOBUKAWA, Osamu URAKAWA, Toshiyuki SHIKATA, Tadashi INOUE

Vol. 58　p. 47-52　2009/01　Research paper (scientific journal)

Small-Angle Neutron Scattering Study on the Miscibility and Concentration Fluctuation of Hydrogen-Bonded Polymer Blends

O. Urakawa, H. Ikuta, S. Nobukawa, T. Shikata

J. Polym. Sci. Part B: Polym. Phys.　Vol. 46　p. 2556-2565　2008/10　Research paper (scientific journal)

Component dynamics in polystyrene/4-pentyl-4'-cyanobiphenyl blend

Shogo Nobukawa, Osamu Urakawa, Toshiyuki Shikata, Tadashi Inoue

XVTH INTERNATIONAL CONGRESS ON RHEOLOGY - THE SOCIETY OF RHEOLOGY 80TH ANNUAL MEETING, PTS 1 AND 2　Vol. 1027　p. 561-563　2008　Research paper (international conference proceedings)

Relationship between segmental dynamics and tracer diffusion of low mass compounds in polyacrylates

Satoshi Maji, Osamu Urakawa, Keiichiro Adachi

POLYMER　Vol. 48　No. 5　p. 1343-1351　2007/02　Research paper (scientific journal)

Phase separation of binary polymer mixtures under an electric field

Hironobu Hori, Osamu Urakawa, Okimichi Yano, Qui Tran-Cong-Miyata

MACROMOLECULES　Vol. 40　No. 2　p. 389-394　2007/01　Research paper (scientific journal)

Dynamic heterogeneity in a miscible poly(vinyl acetate)/poly(ethylene oxide) blend

Osamu Urakawa, Takahiro Ujii, Keiichiro Adachi

JOURNAL OF NON-CRYSTALLINE SOLIDS　Vol. 352　No. 42-49　p. 5042-5049　2006/11　Research paper (scientific journal)

Study of interfacial tension in poly(ethylene oxide)/polystyrene/diblock copolymer system by electric deformation method

Satoru Moriya, Syota Kawamoto, Osamu Urakawa, Keiichiro Adachi

POLYMER　Vol. 47　No. 17　p. 6236-6242　2006/08　Research paper (scientific journal)

Effect of molecular size on cooperative dynamics of low mass compounds in polystyrene

O Urakawa, E Ohta, H Hori, K Adachi

JOURNAL OF POLYMER SCIENCE PART B-POLYMER PHYSICS　Vol. 44　No. 6　p. 967-974　2006/03　Research paper (scientific journal)

Large macro-dipoles generated in a supramolecular polymer of N,N ',N ''-tris(3,7-dimethyloctyl) benzene-1,3,5-tricarboxamide in n-decane

A Sakamoto, D Ogata, T Shikata, O Urakawa, K Hanabusa

POLYMER　Vol. 47　No. 4　p. 956-960　2006/02　Research paper (scientific journal)

Effect of hydrogen bonding on the dynamic heterogeneity of polymer blends

Osamu Urakawa, Hiroyoshi Ikuta, Toshiyuki Shikata

Polymer Preprints, Japan　Vol. 55　No. 2　p. 3119-3120　2006　Research paper (international conference proceedings)

Dynamics of a random copolymer having hydroxyl groups - Effects of hydrogen bonding

H. Ikuta, O. Urakawa, T. Shikata

Polymer Preprints, Japan　Vol. 55　No. 2　2006　Research paper (international conference proceedings)

Dielectric relaxation of poly (butylene oxide) - Relationship between segmental relaxation and global chain relaxation

Minoru Yamane, Osamu Urakawa, Toshiyuki Shikata, Keiichiro Adachi

Polymer Preprints, Japan　Vol. 55　No. 1　2006　Research paper (international conference proceedings)

Dielectric normal mode relaxation of poly(propylene oxide) and poly(butylene oxide) in dilute and semidilute solutions

Hiroshi Nishimura, Osamu Urakawa, Keiichiro Adachi

POLYMER JOURNAL　Vol. 38　No. 10　p. 1081-1088　2006　Research paper (scientific journal)

Dynamics of miscible polymer blends with hydrogen bonding interaction

Hiroyoshi Ikuta, Osamu Urakawa, Keiichiro Adachi

Polymer Preprints, Japan　Vol. 54　No. 2　p. 3403-3404　2005　Research paper (international conference proceedings)

Calorimetric study of dynamical heterogeneity in blends of polyisoprene and poly(vinylethylene)

T Sakaguchi, N Taniguchi, O Urakawa, K Adachi

MACROMOLECULES　Vol. 38　No. 2　p. 422-428　2005/01　Research paper (scientific journal)

Dielectric relaxation in polyisoprene/poly (vinylethylene)/Toluene ternary solutions

Y Hirose, O Urakawa, K Adachi

MACROMOLECULES　Vol. 37　No. 26　p. 10215-10216　2004/12　Research paper (scientific journal)

Dynamics in disordered block copolymers and miscible blend composed of poly(vinyl ethylene) and polyisoprene

Y Hirose, O Urakawa, K Adachi

JOURNAL OF POLYMER SCIENCE PART B-POLYMER PHYSICS　Vol. 42　No. 22　p. 4084-4094　2004/11　Research paper (scientific journal)

Calorimetric study of dynamical heterogeneity in toluene solutions of polystyrene

N Taniguchi, O Urakawa, K Adachi

MACROMOLECULES　Vol. 37　No. 20　p. 7832-7838　2004/10　Research paper (scientific journal)

ポリスチレン/シアノビフェニル系液晶ブレンドの相溶性とダイナミックス

堀博伸, 浦川理, 足立桂一郎

高分子加工　Vol. 53　No. 6　p. 250-256　2004/06

Self-diffusion and viscosity of low molecular weight polystyrene over a wide temperature range

O Urakawa, SF Swallen, MD Ediger, ED von Meerwall

MACROMOLECULES　Vol. 37　No. 4　p. 1558-1564　2004/02　Research paper (scientific journal)

Dielectric relaxation in phase-segregated mixtures of polystyrene and liquid crystal 5CB

H Hori, O Urakawa, K Adachi

MACROMOLECULES　Vol. 37　No. 4　p. 1583-1590　2004/02　Research paper (scientific journal)

Subchain dynamics in disordered diblock copolymer: Poly(isoprene-block- butadiene)

Osamu Urakawa, Masaatsu Kido, Keiichiro Adachi

Nihon Reoroji Gakkaishi　Vol. 32　No. 4　p. 189-195　2004　Research paper (scientific journal)

Dielectric study of dynamical heterogeneity in eco-friendly polymer blends: Poly(lactic acid)/polyether

JD Ren, O Urakawa, K Adachi

NIHON REOROJI GAKKAISHI　Vol. 32　No. 4　p. 161-167　2004　Research paper (scientific journal)

Self-diffusion and spatially heterogeneous dynamics in supercooled liquids near T-9

SF Swallen, O Urakawa, M Mapes, MD Ediger

SLOW DYNAMICS IN COMPLEX SYSTEMS　Vol. 708　p. 491-495　2004　Research paper (international conference proceedings)

Studies on dynamic heterogeneity in miscible polymer blends and dynamics of flexible polymers

O Urakawa

NIHON REOROJI GAKKAISHI　Vol. 32　No. 5　p. 265-270　2004　Research paper (scientific journal)

Biaxial damping function of entangled monodisperse polystyrene melts: Comparison with the Mead-Larson-Doi model

T. Isaki, M. Takahashi, O. Urakawa

Journal of Rheology　Vol. 47　No. 5　p. 1201-1210　2003/09　Research paper (scientific journal)

Dielectric study on the heterogeneous dynamics of miscible polyisoprene/poly(vinyl ethylene) blends: Estimation of the relevant length scales for the segmental relaxation dynamics

Y Hirose, O Urakawa, K Adachi

MACROMOLECULES　Vol. 36　No. 10　p. 3699-3708　2003/05　Research paper (scientific journal)

Dielectric study of concentration fluctuation in solutions of polystyrene

K Yoshizaki, O Urakawa, K Adachi

MACROMOLECULES　Vol. 36　No. 7　p. 2349-2354　2003/04　Research paper (scientific journal)

Dielectric study on dynamics and conformation of poly(D,L-lactic acid) in dilute and semi-dilute solutions

JD Ren, O Urakawa, K Adachi

POLYMER　Vol. 44　No. 3　p. 847-855　2003/02　Research paper (scientific journal)

Dielectric and viscoelastic studies of segmental and normal mode relaxations in undiluted poly(d,l-lactic acid)

JD Ren, O Urakawa, K Adachi

MACROMOLECULES　Vol. 36　No. 1　p. 210-219　2003/01　Research paper (scientific journal)

Dielectric study of dynamical heterogeneity in blends of polystyrene and low mass compounds

H Hori, O Urakawa, K Adachi

POLYMER JOURNAL　Vol. 35　No. 9　p. 721-727　2003　Research paper (scientific journal)

Dielectric study of concentration fluctuations in concentrated polymer solutions

K Adachi, O Urakawa

JOURNAL OF NON-CRYSTALLINE SOLIDS　Vol. 307　p. 667-670　2002/09　Research paper (scientific journal)

相溶性高分子ブレンドの誘電緩和:ポリビニルメチルエーテル/ポリスチレン系

浦川理, 杉原拓道, 足立桂一郎

高分子加工　Vol. 51　No. 5　p. 202-209　2002/05

Dielectric relaxation of poly(n-hexyl isocyanate) in concentrated solutions of polybutadiene

T Hirai, N Fujimura, O Urakawa, K Adachi, M Donkai, K Se

POLYMER　Vol. 43　No. 4　p. 1133-1138　2002/02　Research paper (scientific journal)

Ultrasonic absorption and relaxations in ABS composite polymers

Kazuhito Nishikawa, Yuji Hirose, Osamu Urakawa, Keiichiro Adachi, Akira Hatano, Yuji Aoki

Polymer　Vol. 43　No. 4　p. 1483-1490　2002/02　Research paper (scientific journal)

A dielectric study on the local dynamics of miscible polymer blends: poly(2-chlorostyrene)/poly(vinyl methyl ether)

O Urakawa, Y Fuse, H Hori, Q Tran-Cong, O Yano

Polymer　Vol. 42　No. 2　p. 765-773　2001/01　Research paper (scientific journal)

Effect of Local Heterogeneity on Dielectric Relaxation Spectra in Concentrated Solutions of Poly(vinyl acetate) and Poly(vinyl octanoate)

Masaharu Nakazawa, Osamu Urakawa, Keiichiro Adachi

Macromolecules　Vol. 33　No. 21　p. 7898-7904　2000/10　Research paper (scientific journal)

Effect of Local Heterogeneity on Dielectric Segmental Relaxation of Poly(vinyl acetate) in Concentrated Solution

Makoto Yada, Masaharu Nakazawa, Osamu Urakawa, Yotaro Morishima, Keiichiro Adachi

Macromolecules　Vol. 33　No. 9　p. 3368-3374　2000/05　Research paper (scientific journal)

Polarization-induced intramolecular photodimerization in uniaxially stretched poly(methyl methacrylate)

T Okamoto, Y Imamura, O Urakawa, Q Tran-Cong

JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY A-CHEMISTRY　Vol. 129　No. 3　p. 147-156　1999/12　Research paper (scientific journal)

Directional Phase Separation of Binary Polymer Blends Driven by Photo-Cross-Linking with Linearly Polarized Light

Katsunari Kataoka, Osamu Urakawa, Hiroya Nishioka, Qui Tran-Cong

Macromolecules　Vol. 31　No. 25　p. 8809-8816　1998/12　Research paper (scientific journal)

Pattern selection in phase separation of chemically reacting polymer mixtures

T Ohta, K Kataoka, O Urakawa, T Ohba, Q Tran-Cong

NUOVO CIMENTO DELLA SOCIETA ITALIANA DI FISICA D-CONDENSED MATTER ATOMIC MOLECULAR AND CHEMICAL PHYSICS FLUIDS PLASMAS BIOPHYSICS　Vol. 20　No. 12BIS　p. 2061-2069　1998/12　Research paper (scientific journal)

Small-Angle Neutron Scattering Studies on the Phase Behavior of Binary Polymer Blends Driven by Photoisomerization

Osamu Urakawa, Okimichi Yano, Qui Tran-Cong, Alan I. Nakatani, Charles C. Han

Macromolecules　Vol. 31　No. 22　p. 7962-7965　1998/11　Research paper (scientific journal)

Phase Separation of Binary Polymer Blends Driven by Photoisomerization:  An Example for a Wavelength-Selection Process in Polymers

Takashi Ohta, Osamu Urakawa, Qui Tran-Cong

Macromolecules　Vol. 31　No. 20　p. 6845-6854　1998/10　Research paper (scientific journal)

Effects of Physical Aging on Polarization-Induced Photodimerization in the Glassy Region of Poly(methyl methacrylate)

Youichi Yamaguchi, Takahiro Okamoto, Osamu Urakawa, Qui Tran-Cong

Polymer Journal　Vol. 30　No. 5　p. 414-420　1998/05　Research paper (scientific journal)

Symmetry breaking in phase separation of binary polymer mixtures induced by linearly polarized light

Qui Tran-Cong, Katsunari Kataoka, Osamu Urakawa

Physical Review E　Vol. 57　No. 2　p. R1243-R1246　1998/02/01　Research paper (scientific journal)

Soft-mode suppression in the phase separation of binary polymer mixtures driven by a reversible chemical reaction

Q TranCong, T Ohta, O Urakawa

PHYSICAL REVIEW E　Vol. 56　No. 1　p. R59-R62　1997/07　Research paper (scientific journal)

Positive feedback driven by concentration fluctuations in asymmetrically photo-cross-linked polymer mixtures

Q TranCong, A Harada, K Kataoka, T Ohta, O Urakawa

PHYSICAL REVIEW E　Vol. 55　No. 6　p. R6340-R6343　1997/06　Research paper (scientific journal)

Dielectric Relaxation of Dipole-Invertedcis-Polyisoprene in Solutions:  Concentration Dependence of the Second-Mode Relaxation Time

Osamu Urakawa, Hiroshi Watanabe

Macromolecules　Vol. 30　No. 3　p. 652-654　1997/02　Research paper (scientific journal)

Nonlinear Relaxation Behavior of Entangled Polymer Melts in Several Deformation Fields

Osamu Urakawa, Masaoki Takahashi, Toshiro Masuda

Nihon Reoroji Gakkaishi(Journal of the Society of Rheology, Japan)　Vol. 25　No. 4　p. 191-192　1997　Research paper (scientific journal)

Functional Form of a Damping Function for the BKZ Equation Derived from Experimental Data in Entangled Polymer Systems

Masaoki TAKAHASHI, Osamu URAKAWA, Nadereh GOLSHAN EBRAHIMI, Takeharu ISAKI, Toshiro MASUDA

Nihon Reoroji Gakkaishi(Journal of the Society of Rheology, Japan)　Vol. 24　No. 1　p. 37-42　1996　Research paper (scientific journal)

Dielectric Relaxation ofcis-Polyisoprene Chains in Oligo- and Polybutadiene Matrices:  Matrix Effects on Mode Distribution and Relaxation Time

Hiroshi Watanabe, Osamu Urakawa, Hirofumi Yamada, Ming-Long Yao

Macromolecules　Vol. 29　No. 2　p. 755-763　1996/01　Research paper (scientific journal)

Damping Functions and Chain Relaxation in Uniaxial and Biaxial Extensions: Comparison with the Doi-Edwards Theory

O. Urakawa, M. Takahashi, T. Masuda, N. Golshan Ebrahimi

Macromolecules　Vol. 28　No. 21　p. 7196-7201　1995/10　Research paper (scientific journal)

Dielectric Relaxation of Dipole-Inverted cis-Polyisoprene Solutions

Hiroshi Watanabe, Hirofumi Yamada, Osamu Urakawa

Macromolecules　Vol. 28　No. 19　p. 6443-6453　1995/09　Research paper (scientific journal)

Dielectric Normal Mode Relaxation of Poly(lactone)s in Solution

Osamu Urakawa, Keiichiro Adachi, Tadao Kotaka, Yasunori Takemoto, Hajime Yasuda

Macromolecules　Vol. 27　No. 25　p. 7410-7414　1994/12　Research paper (scientific journal)

Slow Dielectric Relaxation of Entangled Linear cis-Polyisoprenes with Asymmetrically Inverted Dipoles. 2. Behavior in a Short Matrix

Hiroshi Watanabe, Osamu Urakawa, Tadao Kotaka

Macromolecules　Vol. 27　No. 13　p. 3525-3536　1994/06　Research paper (scientific journal)

Slow dielectric relaxation of entangled linear cis-polyisoprenes with asymmetrically inverted dipoles. 1. Bulk systems

Hiroshi Watanabe, Osamu Urakawa, Tadao Kotaka

Macromolecules　Vol. 26　No. 19　p. 5073-5083　1993/09　Research paper (scientific journal)

Dielectric normal mode relaxation of probe polyisoprene chain in semidilute polybutadiene solutions. 2. Dynamic behavior

Osamu Urakawa, Keiichiro Adachi, Tadao Kotaka

Macromolecules　Vol. 26　No. 8　p. 2042-2049　1993/04　Research paper (scientific journal)

Dielectric normal mode relaxation of probe polyisoprene chain in semidilute polybutadiene solutions. 1. End-to-end distance

Osamu Urakawa, Keiichiro Adachi, Tadao Kotaka

Macromolecules　Vol. 26　No. 8　p. 2036-2041　1993/04　Research paper (scientific journal)