Fluctuation effects in ternary AB+A+B polymeric emulsions

Details Fluctuation effects in ternary AB+A+B polymeric emulsions Fluctuation effects in ternary AB+A+B polymeric emulsions

2003-03-31

arxiv.org/abs/cond-mat/0303654v2

Physics

Condensed Matter

Materials Science

minor changes, references added

Scientific paper

10.1021/ma030201y

We present a Monte Carlo approach to incorporating the effect of thermal fluctuations in field theories of polymeric fluids. This method is applied to a field-theoretic model of a ternary blend of AB diblock copolymers with A and B homopolymers. We find a shift in the line of order-disorder transitions from their mean-field values, as well as strong signatures of the existence of a bicontinuous microemulsion phase in the vicinity of the mean-field Lifshitz critical point. This is in qualitative agreement with a recent series of experiments conducted with various three-dimensional realizations of this model system. Further, we also compare our results and the performance of the presently proposed simulation method to that of an alternative method involving the integration of complex Langevin dynamical equations.

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