Dresden 2006 – wissenschaftliches Programm
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CPP: Chemische Physik und Polymerphysik
CPP 3: Polymer Materials
CPP 3.8: Vortrag
Montag, 27. März 2006, 12:00–12:15, ZEU 114
Epoxy networks — •Marian Brandau1, Michael Schulz2, and Steffen Trimper1 — 1Fachbereich Physik, Martin-Luther-Universität, Friedemann-Bach-Platz, 06108 Halle — 2Abteilung Theoretische Physik, Universität Ulm, 89069 Ulm
We present the results of a Monte Carlo simulation for the kinetic of formation in epoxy networks. In particular, two time regimes are distinguished, namely a short time regime characterized by a radicalic polymerisation and a long time regime where slow formation processes are relevant. Whereas the first stage is reaction controlled, diffusion processes determine the second one. On a more microscopic level two kinds of molecules with different functional groups are taken into account. While the so-called cross-linkers are characterized by three or four functional groups, the chain formers are bifunctional. The aim is to find out universal properties of the kinetic of formation such as the cluster size distribution function, and the behavior in the vicinity of the percolation threshold. Moreover, we consider the light-scattering function.