Light Scattering and Spinodal Line of Polystyrene-Cyclohexane Gels

The temperature dependence of the intensity of light scattered by the density fluctuations of polystyrene network (cross-linked by 0.1% divinylbenzene) swollen by cyclohexane was measured in a metastable state. The slope of the inverse intensity of the scattered light vs. the inverse absolute temper...

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Bibliographic Details
Published inKOBUNSHI RONBUNSHU Vol. 46; no. 10; pp. 643 - 645
Main Authors KATO, Eiji, KAWAMURA, Mitsutaka
Format Journal Article
LanguageEnglish
Japanese
Published The Society of Polymer Science, Japan 1989
Subjects
Gel
Light Scattering
Polystyrene-Cyclohexane
Spinodal Line
Swelling
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Summary:The temperature dependence of the intensity of light scattered by the density fluctuations of polystyrene network (cross-linked by 0.1% divinylbenzene) swollen by cyclohexane was measured in a metastable state. The slope of the inverse intensity of the scattered light vs. the inverse absolute temperature curve was determined. The spinodal temperature at which the intensity of the scattered light diverges was determined as a function of the volume fraction of the network φ. In contrast to the prediction of the theory, the slope of the curve depends on φ and greatly increases with increase of φ. Unrealistic values for interaction parameters ΔH and ΔS, and for the number of chains are needed to make the obtained spinodal line coincide with that calculated from the theory.
Bibliography:ObjectType-Article-2
SourceType-Scholarly Journals-1
ObjectType-Feature-1
content type line 23
ISSN:0386-2186
1881-5685
DOI:10.1295/koron.46.643