The brillouin scattering of highly viscous liquids-triacetin and propylene glycol diacetate.
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概要
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The sound velocities of triacetin and propylene glycol diacetate were measured by means of Brillouin scattering in the temperature range from 200 to 350 K. The velocity dispersions due to the structural relaxation were observed in the gigahertz region. The relaxation behaviors could not be interpreted by the empirical equation proposed by Barlow et al., which holds in megahertz region and also the relaxation curves were located in higher frequency region than those predicted by the Maxwell model. The relaxation curves were well reproduced by single relaxation equation. In the temperature ranges of relaxation region, the temperature dependences of viscosity were expressed by Arrhenius' viscosity equation. The relaxation behaviors can be interpreted in terms of the weak cooperative motions of molecules.
- 公益社団法人 日本化学会の論文
著者
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Koda Shinobu
Department Of Chemical Engineering Nagoya University
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Nomura Hiroyasu
Department Of Chemical Engineering Faculty Of Engineering Nagoya University
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Hashitani Ryuki
Department Of Chemical Engineering School Of Engineering Nagoya University
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Matsui Hirohito
Department of Chemical Engineering, School of Engineering, Nagoya University
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