Dresden 2006 – scientific programme
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CPP: Chemische Physik und Polymerphysik
CPP 26: POSTER Dynamics and Diffusion
CPP 26.11: Poster
Thursday, March 30, 2006, 17:00–19:00, P2
Spacer effects in branched polymer dynamics — •Cristian Satmarel1, Christian von Ferber1,2, and Alexander Blumen1 — 1Theoretische Polymerphysik, Universität Freiburg, Hermann-Herder Str. 3, 79104-Freiburg, Deutschland — 2Jagellonian University, Reymonta 4, 30-059 Krakow, Poland
We investigate the relation between structure and viscoelastic behavior of branched copolymeric structures, highlighting the important effects of linear spacer segments between branching points [1,2]. In the framework of generalized Gaussian models we succeed in determining the eigenvalue spectra of such networks, by developing an analytical procedure which involves an exact real-space renormalization. This allows us to relate the spectrum of the extended structure (in which the branching points are linked to each other through spacer segments) to that of a simpler, "reduced" structure without spacers. In so doing, we find that the dynamic spectra are related through a global transformation. To exemplify our procedure, we apply the method to typical hyperbranched polymers [1], as well as to randomly linked star polymers [2].
[1] C. Satmarel, C. von Ferber and A. Blumen, in preparation.
[2] C. Satmarel, C. von Ferber and A. Blumen, J. Chem. Phys. 123, 034907, 2005.