15-20 June 2014
Laurentian University / Université Laurentienne
America/Toronto timezone
Welcome to the 2014 CAP Congress! / Bienvenue au congrès de l'ACP 2014!

**WITHDRAWN** Monte Carlo Field-Theoretic Simulations for Melts of Diblock Copolymer

17 Jun 2014, 14:45
30m
A-226 (Laurentian University / Université Laurentienne)

A-226

Laurentian University / Université Laurentienne

Sudbury, Ontario
Invited Speaker / Conférencier invité Condensed Matter and Materials Physics / Physique de la matière condensée et matériaux (DCMMP-DPMCM) (T2-6) Biophysics/Soft Condensed Matter I: Polymers - DCMMP-DMBP / Biophysique et matière condensée molle 1: polymères - DPMCM-DPMB

Speaker

Prof. Mark Matsen (University of Waterloo)

Description

Monte Carlo field-theoretic simulations (MC-FTS) are performed on melts of symmetric diblock copolymer for polymerization indices extending down to experimentally relevant values. The simulations are performed with a fluctuating composition field and a pressure field that follows the saddle-point approximation. Our study focuses on the disordered-state structure function, S(k), and the order-disorder transition (ODT). Although short-wavelength fluctuations cause an ultraviolet (UV) divergence in three dimensions, this is readily compensated for with the use of an effective Flory-Huggins interaction parameter. The resulting S(k) matches the predictions of renormalized one-loop (ROL) calculations over the full range of parameters examined in our study, and agrees well with Fredrickson-Helfand (F-H) theory near the ODT. Consistent with the F-H theory, the ODT is discontinuous and the shift in the ODT follows the predicted scaling.

Primary author

Prof. Mark Matsen (University of Waterloo)

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