The theta-point and critical point of polymeric fractals : a step beyond Flory approximation
نویسنده
چکیده
We propose a new form of free energy for polymeric fractals (chain-like, branched or membranes) based on self-similarity arguments and on the existence of a maximum gyration radius. Results are obtained conceming the size exponents at the theta-point and critical point. These two exponents depend on a single parameter only, for which a simple phenomenological expression is provided. A very good fit is obtained with numerical or experimental results conceming linear and branched polymers. A comparison with the Flory-de Gennes free-energy emphasizes the non mean-field features of the new free-energy-
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