Berlin 2018 – wissenschaftliches Programm

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CPP: Fachverband Chemische Physik und Polymerphysik

CPP 5: Polymer Networks and Elastomers I

CPP 5.5: Vortrag

Montag, 12. März 2018, 10:45–11:00, PC 203

The elasticity of phantom networks with cyclic and linear defects — •Michael Lang — Institut Theorie der Polymere, Leibniz Institut für Polymerforschung Dresden, Hohe Straße 6, 01069 Dresden, Germany

The resistor network analogy is used to compute the phantom modulus of realistic polymer networks containing finite cycles. We correct a recently published approach [1], connect with results on the distribution of cyclic defects, and generalize to networks of arbitrary junction functionality containing both cyclic and linear defects. It turns out that the impact of finite cyclic structures on rubber elasticity was previously [1] overestimated and that a consideration of the smallest dangling loops in combination with a precise estimate of conversion is sufficient in most cases for estimating the phantom modulus of the network.

[1] M. Zhong, R. Wang, K. Kawamoto, B. D. Olsen, J. A. Johnson. Science, 353:1264–1268, 2016.