Electronic Resource
College Park, Md.
:
American Institute of Physics (AIP)
The Journal of Chemical Physics
90 (1989), S. 6652-6655
ISSN:
1089-7690
Source:
AIP Digital Archive
Topics:
Physics
,
Chemistry and Pharmacology
Notes:
The phase diagrams and the critical properties of solutions of binary polymer mixtures are investigated. Both polymer species are chemically identical and differ only in their molecular weights. Depending on the relative concentration and the relative molecular weights of the two polymer species, different behaviors may be found. Thus, the addition to a monodisperse polymer solution of chains of smaller or comparable molecular weight does not change the phase behavior: in particular, the critical exponents remain of the Ising type. On the contrary, adding chains of larger molecular weight deeply transforms the phase behavior: the location of the critical points is deeply modified, a third phase may even appear, and the critical exponents are renormalized. A simple criterion for the crossover between the Ising and the renormalized behaviors is given.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1063/1.456283
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