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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.