Glass Transition Phenomena and Rheological Properties of Petroleum Asphalt
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概要
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Volume dilatometry was made for nine kinds of asphalt in a wide range of asphaltene content X. The glass transition temperature T_g becomes higher with increase of X. The discontinuity in thermal expansion coefficient at T_g decreases with X and T_g can no more be observed for X > 70%. The complex shear modulus and shear creep compliance of five samples of asphalt were measured. Above T_g, asphalt is viscoelastic. The temperature-time reducibility applies very well to asphalt. The temperature dependence of retardation times as well as steady flow viscosity obeys to Williams-Landel-Ferry's equation, the standard temperature involved in this equation being 56° higher than T_g for all the samples. The distribution function of retardation times is approximately of a wedge shape when plotted in logarithmic scales, the slope being 0.5 or less according to X. The steady flow viscosity and the maximum retardation time reduced to 20℃ markedly increase with X. These facts allow us some predictions about molecular behaviors in asphalt.
- 社団法人日本物理学会の論文
- 1960-10-05
著者
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WADA Yasaku
Department of Polymer Materials Engineering, Faculty of Engineering, Yamagata University
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HIROSE Hidenori
Department of Applied Physics, Faculty of Engineering, University of Tokyo
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Hirose Hidenori
Department Of Applied Physics Faculty Of Engineering University Of Tokyo
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Wada Yasaku
Department Of Applied Physics Faculty And Engineering University Of Tokyo
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