Regensburg 2016 – wissenschaftliches Programm

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CPP: Fachverband Chemische Physik und Polymerphysik

CPP 3: Polymer Networks and Elastomers

CPP 3.1: Hauptvortrag

Montag, 7. März 2016, 09:30–10:00, H40

Orientation effects in polymer networks — •Vladimir Toshchevikov — Leibniz-Institut für Polymerforschung Dresden e.V.

Crosslinked polymer networks remain a subject of extensive investigations due to their importance for technical applications and everyday life. Mechanical properties of these materials are determined by the change of conformations of network strands and by reorientation of chain segments under external stimuli. Incorporation of functional moieties, which can form the orientation order under external stimuli, into polymer networks opens up fascinating possibilities for creation of novel stimuli-sensitive smart materials. The present overview deals with recent theoretical developments to describe the influence of the orientation order on the mechanical properties of polymer networks. In particular, effects of the orientation order, which appears in liquid-crystalline networks [1] and in functional crosslinked polymers under mechanical [2] or electromagnetic fields [3], on the shape and on the static and dynamic moduli are discussed. The Gaussian approach for describing the statistics and mechanical properties of polymer networks is verified. [1] V. Toshchevikov et al. Macromolecules 42 (2009), 3417. [2] V. Toshchevikov et al. Macromol. Theory Simul. 19 (2010), 195. [3] V. Toshchevikov et al. J. Phys. Chem. B 116 (2012), 913; 118 (2014) 12297.