Tricritical phenomena in bimodal polymer solutions

Weiguo Shen, Gareth R. Smith, Charles M. Knobler and Robert L. Scott

Physica A: Statistical Mechanics and its Applications, 1991, vol. 177, issue 1, 311-323

Abstract: The turbidities of four bimodal mixtures of polystyrene in methylcyclohexane have been measured in the three-phase region near the tricritical point. The results from eight different wavelengths have been analyzed to obtain the correlation lengths ξ and the susceptibilities χ. χ and ξ are strongly correlated, so it is their ratio χ/ξ that is determined most precisely. As the tricritical point is approached, all three quantities diverge, as expected from the classical mean-field theory. Although the uncertainties are larger than wished for, it appears that the Griffiths first sums get increasingly larger as the tricritical point is approached, and probably diverge in the same way as has been observed for other tricritical systems.

Date: 1991
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Persistent link: https://EconPapers.repec.org/RePEc:eee:phsmap:v:177:y:1991:i:1:p:311-323

DOI: 10.1016/0378-4371(91)90168-C

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