研究者詳細 - 増渕　雄一

論文 - 増渕　雄一

分割表示 212 件中 161 - 180 件目／全件表示 >>

Reversibility of the ER effect in immiscible liquid blends 査読有り国際誌

Yamamoto S, Masubuchi Y, Takimoto J

INTERNATIONAL JOURNAL OF MODERN PHYSICS B 16 巻 ( 17-18 ) 頁： 2468-2473 2002年7月

The contribution of columnar structure to the stress in Er polymeric blends in a shear flow 査読有り国際共著国際誌

Riha P, Takimoto J, Masubuchi Y, Koyama K

INTERNATIONAL JOURNAL OF MODERN PHYSICS B 16 巻 ( 17-18 ) 頁： 2542-2547 2002年7月

Simulation study on molecular relaxation in ionomer melts 査読有り国際誌

Masubuchi Y, Nishioka A, Takimoto JI, Koyama K

POLYMER 43 巻 ( 1 ) 頁： 239-242 2002年1月

Rheological characterization of ionic bonding in ethylene-ionomer melts with low neutralization degree 査読有り国際誌

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

JOURNAL OF RHEOLOGY 46 巻 ( 6 ) 頁： 1325-1339 2002年

Melt rheology of polypropylene containing small amounts of high molecular weight chain. I. Shear flow 査読有り国際誌

Sugimoto M, Masubuchi Y, Takimoto J, Koyama K

JOURNAL OF POLYMER SCIENCE PART B-POLYMER PHYSICS 39 巻 ( 21 ) 頁： 2692-2704 2001年11月

Brownian simulations of a network of reptating primitive chains 査読有り国際共著国際誌

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

JOURNAL OF CHEMICAL PHYSICS 115 巻 ( 9 ) 頁： 4387-4394 2001年9月

潤滑圧縮法を用いた高分子溶融体の平面伸長粘度および平面伸長応力緩和測定査読有り国際誌

西岡昭博, 増渕雄一, 滝本淳一, 小山清人

成形加工 13 巻 ( 8 ) 頁： 563 - 570 2001年8月

記述言語：日本語掲載種別：研究論文（学術雑誌）出版者・発行元：一般社団法人プラスチック成形加工学会

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 査読有り国際誌

Sugimoto M, Masubuchi Y, Takimoto J, Koyama K

MACROMOLECULES 34 巻 ( 17 ) 頁： 6056-6063 2001年8月

Melt rheology of ethylene ionomers blended with a small-molecule acid 査読有り国際誌

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

POLYMER 42 巻 ( 18 ) 頁： 7907-7910 2001年8月

Uniaxial elongational viscosity of PS/a small amount of UHMW-PS blends 査読有り国際誌

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

RHEOLOGICA ACTA 40 巻 ( 4 ) 頁： 329-338 2001年7月

Thermal analysis of shear induced crystallization by the shear flow thermal rheometer: isothermal crystallization of polypropylene 査読有り国際誌

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

POLYMER 42 巻 ( 11 ) 頁： 5023-5027 2001年5月

Molecular orientation and electrohydrodynamic flow in homogeneous ER fluids 査読有り国際誌

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

INTERNATIONAL JOURNAL OF MODERN PHYSICS B 15 巻 ( 6-7 ) 頁： 973-979 2001年3月

Domain structure and MR effect of ferrofluid emulsion 査読有り国際誌

Ogawa C, Masubuchi Y, Takimoto JI, Koyama K

INTERNATIONAL JOURNAL OF MODERN PHYSICS B 15 巻 ( 6-7 ) 頁： 859-863 2001年3月

The mechanism of ER effect induced by attaching flocked fabrics on electrodes 査読有り国際誌

Kato Y, Masubuchi Y, Takimoto JI, Koyama K

INTERNATIONAL JOURNAL OF MODERN PHYSICS B 15 巻 ( 6-7 ) 頁： 767-773 2001年3月

Electrically induced viscosity change in immiscible liquid blend 査読有り国際誌

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

INTERNATIONAL JOURNAL OF MODERN PHYSICS B 15 巻 ( 6-7 ) 頁： 1062-1069 2001年3月

Uniaxial elongational flow behaviour of SBS block copolymer melts treated at high temperature - The correlation of crosslinking and strain-hardening 査読有り国際誌

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

NIHON REOROJI GAKKAISHI 29 巻 ( 1 ) 頁： 61-62 2001年

Description of uniaxial, biaxial, and planar elongational viscosities of polystyrene melt by the K-BKZ model 査読有り国際誌

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

JOURNAL OF NON-NEWTONIAN FLUID MECHANICS 89 巻 ( 3 ) 頁： 287-301 2000年3月

Dependence of sonochemical luminescence on various sound fields 査読有り国際誌

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

ULTRASONICS 38 巻 ( 1-8 ) 頁： 671-675 2000年3月

Development of sheer flow thermal rheometer for direct measurement of crystallization fraction of polymer melts under shear deformation 査読有り国際誌

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

POLYMER 41 巻 ( 2 ) 頁： 523-531 2000年1月

Development of shear flow thermal rheometer for direct measurement of crystallization fraction of polymer melts under shear deformation 査読有り国際誌

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

Polymer 41 巻 ( 2 ) 頁： 523 - 531 2000年1月

記述言語：英語掲載種別：研究論文（学術雑誌）出版者・発行元：Polymer

Recently viscoelastic measurement has received considerable attention as a complementary method to estimate the crystallization dynamics under shear. However, because of the complex relationship between the crystallization fraction and dynamic mechanical results, it has been difficult to obtain accurate crystallization fraction under shear. To conduct the direct determination of crystallization fraction under shear, the shear flow thermal rheometer (SFTR) having differential thermal analysis (DTA) has been successfully developed using a rotational shear rheometer. Two thermocouples to measure the reference and the sample temperatures were installed at each optimal position as DTA equipment. Two sheets of polyetheretherketone (PEEK) were put on two aluminum plates to prevent heat transfer between the sample and the aluminum plates for accurate measurement of DTA. The influences of using PEEK, instead of an aluminum plate and the thermocouple on rheology results were confirmed to be negligible. In the SFTR, shear strain was given from the lower plate. Both stress and differential temperature responses were simultaneously detected by the upper plate and thermocouples, respectively. The advantage of the SFTR over conventional rheometers was that the crystallinity fraction was able to be directly determined from DTA. In non-isothermal and isothermal preliminary experiments of iso-polypropylene, it was demonstrated that the SFTR provided two kinds of data by the simultaneous measurement of DTA and viscosity. The crystallinity fraction under shear was directly estimated from DTA in the SFTR.

DOI： 10.1016/S0032-3861(99)00226-8

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