Anomalous Light Scattering by Poly(2-vinylpyridine) in Methanol
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概要
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The light scattering of a poly(2-vinylpyridine) solution was measured under various conditions. In solvents such as methanol, ethanol, 2-propanol, 2-butanone, and pyridine, anomalous Zimm plots with an upward inflection at lower angles were observed. This anomaly was especially striking in methanol, in which the dissymmetry coefficient was frequently less than unity. Systematic investigations carried out with methanol as a solvent revealed that; (1) the anomaly does not depend appreciably on the concentration or tacticity of the polymer, the temperature, or the wavelength of the incident light; (2) the anomaly diminishes with an increase in the molecular weight of the polymer; (3) the anomaly disappears upon the addition of dry ammonia of 10<SUP>−2</SUP> mol/1 or more in methanol, and (4) similar perturbed Zimm plots are realized by the addition of a trace amount of hydrochloric acid or sulfuric acid in a methanol solution of a higher-molecular-weight fraction which showed a normal Zimm plot in pure methanol. The anomaly can not be explained in terms of the effects of the optical anisotropy of the polymer segment, but the external interference arising from the non-random arrangement of the polymer in solution may contribute to it.
- 公益社団法人 日本化学会の論文
著者
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Sakamoto Noriyuki
Department of Chemistry, Faculty of General Education, Kumamoto University
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Arichi Shizuo
Chemical Laboratory, Department of General Education, Kumamoto University
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Yoshida Masafumi
Chemical Laboratory, Department of General Education, Kumamoto University
関連論文
- Viscosity Behavior of Poly (2-vinylpyridine) for Low Molecular Weight
- Solution properties of low molecular weight fractions of poly(2-vinylpyridine).
- Viscosity behavior of poly(2-vinylpyridine) of a low molecular weight.
- Anomalous Light Scattering by Poly(2-vinylpyridine) in Methanol
- The Specific Refractive Index Increment and the Partial Specific Volume of Atactic Poly (2-vinylpyridine)