Electronic Resource
[S.l.]
:
American Institute of Physics (AIP)
Journal of Applied Physics
58 (1985), S. 2871-2874
ISSN:
1089-7550
Source:
AIP Digital Archive
Topics:
Physics
Notes:
Coexistence curves for binary polymer/solvent solutions are asymmetric when volume fraction is used as the concentration variable. Coexistence curves for polystyrene/methylcyclohexane solutions can be symmetrized by a simple transformation of variables; in the new dimensionless variable ψ, all of the data satisfy a universal scaling law: ||ψ−ψc||=ψ0(εN0.313)β; ε≡(Tc−T)/Tc, where N is the degree of polymerization and ψc and ψ0 are constants independent of N. The experimental value of the critical exponent β (0.327±0.002) agrees well with recent renormalization group calculations for the Ising model. The exponent on N(0.102±0.002) may be universal and should be compared with its mean-field value of 1/4; a calculation of its nonclassical value remains a challenging theoretical problem.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1063/1.335859
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