Faculty Profiles - MASUBUCHI Yuichi

Papers - MASUBUCHI Yuichi

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Reversibility of the ER effect in immiscible liquid blends Reviewed International journal

Yamamoto S, Masubuchi Y, Takimoto J

INTERNATIONAL JOURNAL OF MODERN PHYSICS B Vol. 16 ( 17-18 ) page： 2468-2473 2002.7

The contribution of columnar structure to the stress in Er polymeric blends in a shear flow Reviewed International coauthorship International journal

Riha P, Takimoto J, Masubuchi Y, Koyama K

INTERNATIONAL JOURNAL OF MODERN PHYSICS B Vol. 16 ( 17-18 ) page： 2542-2547 2002.7

Simulation study on molecular relaxation in ionomer melts Reviewed International journal

Masubuchi Y, Nishioka A, Takimoto JI, Koyama K

POLYMER Vol. 43 ( 1 ) page： 239-242 2002.1

Rheological characterization of ionic bonding in ethylene-ionomer melts with low neutralization degree Reviewed International journal

Nishioka A, Takahashi T, Masubuchi Y, Takimoto J, Koyama K

JOURNAL OF RHEOLOGY Vol. 46 ( 6 ) page： 1325-1339 2002

Melt rheology of polypropylene containing small amounts of high molecular weight chain. I. Shear flow Reviewed International journal

Sugimoto M, Masubuchi Y, Takimoto J, Koyama K

JOURNAL OF POLYMER SCIENCE PART B-POLYMER PHYSICS Vol. 39 ( 21 ) page： 2692-2704 2001.11

Brownian simulations of a network of reptating primitive chains Reviewed International coauthorship International journal

Masubuchi Y, Takimoto JI, Koyama K, Ianniruberto G, Marrucci G, Greco F

JOURNAL OF CHEMICAL PHYSICS Vol. 115 ( 9 ) page： 4387-4394 2001.9

Measurement of Planar Elongational Viscosity and Planar Stress Relaxation of Polymer Melts Using Lubricated Squeezing Flow Method Reviewed International journal

NISHIOKA Akihiro, MASUBUCHI Yuichi, TAKIMOTO Jun-ichi, KOYAMA Kiyohito

Seikei-Kakou Vol. 13 ( 8 ) page： 563 - 570 2001.8

Language：Japanese Publishing type：Research paper (scientific journal) Publisher：The Japan Society of Polymer Processing

A technique to measure planar elongational viscosity and step-planar stress relaxation, by using a lubricated squeeze flow method with PS and LDPE, has been optimized and established. The effect of experimental conditions, i.e., the viscosity of silicone oil as a lubricant, appeared in the measurement of the planar elongational viscosity. The dependence of the uniform planar deformation behavior on the silicone oil viscosity was greater in LDPE than in PS. A high viscosity silicone oil (3.0×102Pa-s) was chosen to minimize the loss of lubricant. Although the step-planar stress relaxation experiments required speeds that exceeded the testing machine specification to achieve the step deformation, this problem was successfully solved by inserting a metal spacer between the lower plate and the sample. The high viscosity silicone oil produced uniform deformation in both materials with minimal loss of the lubricant, however, the high viscosity of the silicone oil was believed to lead larger measured G0(t) results than the predicted values. The silicone oil viscosity was optimized at a lower value of 1.0×101Pa-s which minimized the influence of the silicone oil on the results while still producing substantial lubricity. The measurement of planar elongational viscosity by using this optimal silicone oil showed strain-hardening in both samples, with LDPE showing a stronger dependence. “Time-strain separability” within a certain time period was confirmed for the step planar stress relaxation modulus under the optimized conditions.

DOI： 10.4325/seikeikakou.13.563

Melt rheology of polypropylene containing small amounts of high-molecular-weight chain. 2. Uniaxial and biaxial extensional flow Reviewed International journal

Sugimoto M, Masubuchi Y, Takimoto J, Koyama K

MACROMOLECULES Vol. 34 ( 17 ) page： 6056-6063 2001.8

Melt rheology of ethylene ionomers blended with a small-molecule acid Reviewed International journal

Nishioka A, Takahashi T, Masubuchi Y, Takimoto J, Koyama K

POLYMER Vol. 42 ( 18 ) page： 7907-7910 2001.8

Uniaxial elongational viscosity of PS/a small amount of UHMW-PS blends Reviewed International journal

Minegishi A, Nishioka A, Takahashi T, Masubuchi Y, Takimoto J, Koyama K

RHEOLOGICA ACTA Vol. 40 ( 4 ) page： 329-338 2001.7

Thermal analysis of shear induced crystallization by the shear flow thermal rheometer: isothermal crystallization of polypropylene Reviewed International journal

Masubuchi Y, Watanabe K, Nagatake W, Takimoto JI, Koyama K

POLYMER Vol. 42 ( 11 ) page： 5023-5027 2001.5

Molecular orientation and electrohydrodynamic flow in homogeneous ER fluids Reviewed International journal

Iwatsuki H, Gohko N, Kimura H, Masubuchi Y, Takimoto JI, Koyama K

INTERNATIONAL JOURNAL OF MODERN PHYSICS B Vol. 15 ( 6-7 ) page： 973-979 2001.3

Domain structure and MR effect of ferrofluid emulsion Reviewed International journal

Ogawa C, Masubuchi Y, Takimoto JI, Koyama K

INTERNATIONAL JOURNAL OF MODERN PHYSICS B Vol. 15 ( 6-7 ) page： 859-863 2001.3

The mechanism of ER effect induced by attaching flocked fabrics on electrodes Reviewed International journal

Kato Y, Masubuchi Y, Takimoto JI, Koyama K

INTERNATIONAL JOURNAL OF MODERN PHYSICS B Vol. 15 ( 6-7 ) page： 767-773 2001.3

Electrically induced viscosity change in immiscible liquid blend Reviewed International journal

Kimura H, Aikawa K, Masubuchi Y, Takimoto JI, Koyama K

INTERNATIONAL JOURNAL OF MODERN PHYSICS B Vol. 15 ( 6-7 ) page： 1062-1069 2001.3

Uniaxial elongational flow behaviour of SBS block copolymer melts treated at high temperature - The correlation of crosslinking and strain-hardening Reviewed International journal

Minegishi A, Takakashi T, Nishioka A, Masubuchi Y, Takimoto J, Koyama K

NIHON REOROJI GAKKAISHI Vol. 29 ( 1 ) page： 61-62 2001

Description of uniaxial, biaxial, and planar elongational viscosities of polystyrene melt by the K-BKZ model Reviewed International journal

Nishioka A, Takahashi T, Masubuchi Y, Takimoto J, Koyama K

JOURNAL OF NON-NEWTONIAN FLUID MECHANICS Vol. 89 ( 3 ) page： 287-301 2000.3

Dependence of sonochemical luminescence on various sound fields Reviewed International journal

Yanagida H, Masubuchi Y, Minagawa K, Takimoto J, Ogata T, Koyama K

ULTRASONICS Vol. 38 ( 1-8 ) page： 671-675 2000.3

Development of sheer flow thermal rheometer for direct measurement of crystallization fraction of polymer melts under shear deformation Reviewed International journal

Nagatake W, Takahashi T, Masubuchi Y, Takimoto JI, Koyama K

POLYMER Vol. 41 ( 2 ) page： 523-531 2000.1

Development of shear flow thermal rheometer for direct measurement of crystallization fraction of polymer melts under shear deformation Reviewed International journal

Nagatake W., Takahashi T., Masubuchi Y., Takimoto J., Koyama K.

Polymer Vol. 41 ( 2 ) page： 523 - 531 2000.1

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Papers - MASUBUCHI Yuichi