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자료유형
학술저널
저자정보
Nishitsuji, Shotaro (Department of Polymer Science and Engineering, Graduate School of Science and Engineering, Yamagata University) Takenaka, Mikihito (Division of Multidisciplinary Chemistry, Institute for Chemical Research, Kyoto University) Amino, Naoya (The Yokohama-rubber Company, Ltd.) Ishikawa, Yasuhiro (The Yokohama-rubber Company, Ltd.)
저널정보
한국고무학회 Elastomers and composites 엘라스토머 및 콤포지트 제54권 제2호
발행연도
2019.1
수록면
156 - 160 (5page)

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The changes in the dispersion of carbon black in liquid polyisoprene under shear flow with time have been investigated by time-resolved ultra small-angle X-ray scattering (USAXS) method. The analyses of USAXS profile immediately after the start of shear flow clarified that the aggregates of carbon black with a mean radius of gyration of 14 nm and surface fractal dimension of 2.5 form the fractal network structure with mass-fractal dimension of 2.9. After the application of the shear flow, the scattering intensity increases with time at the observed whole entire q region, and then the a shoulder appears at $q=0.005nm^{-1}$, indicating that the agglomerate is broken and becomes smaller by shear flow. The analysis by the Unified Guinier/Power-law approach yielded several characteristic parameters, such as the sizes of aggregate and agglomerate, mass-fractal dimension of agglomerate, and surface fractal dimension of the primary particle. While the mean radius of gyration of the agglomerate decreases with time, the mean radius of gyration of the aggregate, mass fractal dimension, and surface fractal dimension don't change with time, indicating that the aggregates peel off the surface of the agglomerate.

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