Dresden 2011 – wissenschaftliches Programm

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CPP: Fachverband Chemische Physik und Polymerphysik

CPP 14: Elastomers and Gels

CPP 14.2: Vortrag

Dienstag, 15. März 2011, 11:00–11:15, ZEU 114

The distribution of segmental order in polymer networks — •Michael Lang¹ and Jens-Uwe Sommer^1,2 — ¹Leibniz Institut für Polymerforschung e.V., Hohe Straße 6, 01069 Dresden, Germany — ²Institut für Theoretische Physik, Technische Universität Dresden

Recently we showed [1] that segmental order in entangled polymer networks is controlled by monomer fluctuations along the tube, which leads to a dependence (N_eN)^−1/2 for the average segment orientation of entangled chains of length N>N_e in monodisperse networks, where N_e denotes the tube reorientation length. We extend this approach to derive the distribution of segmental order based on Gaussian chain conformations and randomly reorienting tubes for monodisperse samples. Furthermore, effects of polydispersity are discussed and we also include the effect of the most predominant network defects in our discussions.

[1] M. Lang, J.-U. Sommer, PRL 108, 177801 (2010).