Viscous Properties of Liquid Oligotrifluorochloroethylene
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概要
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The viscosities of fractionated liquid oligotrifluorochloroethylene were measured in the molecular-weight range from 820 to 2100 at temperatures ranging from 40 to 120°C. While the relationships between logη and log<I>M<SUB>n</SUB></I> were regarded as being approximately linear in the molecular-weight range smaller than 1090, and their slopes were much larger than unity, a considerable deviation from the approximately linear relationship was observed in the molecular-weight range larger than 1090. The temperature dependence of the viscosities was well explained in terms of the WLF equation under the present experimental conditions. The large slope in the range of the linear relationship may be caused because the reciprocals of the free-volume fractions, 1/<I>f</I>, increase remarkably with an increase in the molecular-weight. The free-volume per cubic centimeter, <I>F</I>, contributed by chain-ends increased abruptly with an increase in the molecular-weight in the range smaller than about 1200.
- 公益社団法人 日本化学会の論文
著者
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Hamada Shuichi
Department Of Applied Chemistry Faculty Of Science And Institute Of Colloid And Surface Chemistry Sc
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Yoshida Naosato
Department of Chemistry, Faculty of Science, Science University of Tokyo
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