Dresden 2003 – scientific programme
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SYSE: Simulation and experiment
SYSE 2: Poster (gemeinsam mit SYCN und CPP)
SYSE 2.25: Poster
Tuesday, March 25, 2003, 19:00–21:00, ZEU/250
Phase separation kinetics in compressible polymer solutions: Computer simulation of the early stages — •Peter Virnau1, Marcus M"uller1, Luis G. MacDowell2, and Kurt Binder1 — 1Institut f"ur Physik, Universit"at Mainz — 2Dpto. de Quimica Fisica, Universidad Complutense, 28040 Madrid, Spain
We present a simple model which allows us to examine equilibrium properties and kinetics of phase separation in systems of industrial relevance, namely polymers in supercritical solution. After a brief overview of the general phase diagram we focus on the dynamics of phase separation in the mixture. We will show two animations of bubble nucleation and spinodal decomposition. We will explain how the type of phase diagram influences the occurance of interfacial wetting thus decreasing interfacial tension. Finally, we will present evidence that for small nuclei the free energy and hence the nucleation barrier is lower than expected by classical theory of homogeneous nucleation.