| Project/Area Number |
10650751
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| Research Category |
Grant-in-Aid for Scientific Research (C)
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| Allocation Type | Single-year Grants |
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| Section | 一般 |
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| Research Field |
化学工学一般
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| Research Institution | Kagoshima University |
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Principal Investigator |
UEMURA Yoshimitsu Kagoshima University, Faculty of Engineering, Associate Professor, 工学部, 助教授 (60160222)
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| Co-Investigator(Kenkyū-buntansha) |
AIKOH Ryoko Kagoshima University, Faculty of Engineering, Technical Official, Ministry of Education, 工学部, 教務職員 (50244265)
YOSHIZAWA Hidekazu Okayama Univ., Fac. of Environmental Sci. & Tech., Associate Professor, 環境理工学部, 助教授 (20244262)
HATATE Yasuo Kagoshima University, Faculty of Engineering, Professor, 工学部, 教授 (00038051)
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| Project Period (FY) |
1998 – 1999
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| Project Status |
Completed (Fiscal Year 1999)
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| Budget Amount *help |
¥3,500,000 (Direct Cost: ¥3,500,000)
Fiscal Year 1999: ¥900,000 (Direct Cost: ¥900,000)
Fiscal Year 1998: ¥2,600,000 (Direct Cost: ¥2,600,000)
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| Keywords | Association / Polymer / Poly(vinyl alcohol) / Polystyrene / Nuclear Magnetic Resonance / Diffusion / Viscosity / Ultrafine Particle / 粘度 / ラテックス |
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| Research Abstract |
Hydrophobically modified poly(vinyl alcohol)s, in which hydrophobic modifiers are located only at the one end of the backbone, and their control polymers were investigated how they behave in aqueous solution at various concentrations. The techniques used were pulsed gradient spin echo nuclear magnetic resonance spectroscopy (PGSE NMR) and rheometry to investigate self-diffusivity and viscosity respectively. An attempt to create new dispersion systems using the associative polymer was made as an application study.
The followings have been concluded.
(1) In the PGSE NMR measurements, the three gerent protons belonging to the methylene, acetyl and hydroxyl groups of the polymers used showed the same self-diffusion coefficient.
(2) A hydrophobically modified poly(vinyl alcohol) exhibited an abrupt decrease in diffusivity with concentration at 2 wt%, which may be caused by transition from a non-association state to an inter-molecular association state.
(3) Existence of hydrophobic group made viscosity larger, and self-diffusivity smaller.
(4) At concentrations less than 1wt%, all the hydrophobically modified poly(vinyl alcohol)s did not associate.
(5) Zirconia fine-particles of submicron in size were obtained using the water-borne polymers.
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