Volume 48, Number 4, November II 1999
|Page(s)||372 - 377|
|Published online||01 September 2002|
Molecular weight scaling in critical polymer solutions
Solid State Division, Oak Ridge National Laboratory (Managed by Lockheed Martin Energy Research Corporation under contract DE-AC05-96OR-22464 for the U. S. Department of Energy.) - Oak Ridge, TN 37831, USA
2 Department of Chemistry, University of Tennessee - TN 37996, USA
Accepted: 13 September 1999
In this letter we address the long-standing controversy which originated from differences between the experimental and theoretical values of the scaling exponent for the critical amplitude of the correlation length in polymer solutions. Using small-angle neutron scattering we examine the dependence of on polymer molecular weight in polystyrene-methylcyclohexane- solutions. We find that the experimental values of in the critical region of phase demixing as well as in the mean-field domain around the Θ temperature agree with the predictions of scaling theory , .
PACS: 05.70.Jk – Critical point phenomena / 61.41.+e – Polymers, elastomers, and plastics / 64.60.Fr – Equilibrium properties near critical points, critical exponents
© EDP Sciences, 1999
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