Regensburg 2010 – wissenschaftliches Programm
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CPP: Fachverband Chemische Physik und Polymerphysik
CPP 9: Crystallization and Self Assembly II
CPP 9.2: Vortrag
Montag, 22. März 2010, 14:15–14:30, H48
Testing the Renormalized One-Loop Theory for S(q) in Diblock Copolymers — •David Morse1,2 and Jian Qin1 — 1University of Minnesota — 2University of Goettingen
We compare predictions of the renormalized one-loop (ROL) theory of correlations in block copolymers to extensive simulations of a simple bead spring model. The ROL theory is a rigorous theory of corrections to the random-phase approximation for the structure factor S(q), to first order in an expansion in N−1/2. ROL theory includes the Fredrickson-Helfand FH theory as a limiting case, in the limit of large peak-intensity, very near the ordering transition. ROL theory (but not FH theory) is found to give accurate predictions for both the peak intensity and peak wavenumber over a wide range of values of the Flory-Huggins interaction parameter χ, from χ=0 to the transition.