Berlin 2018 – wissenschaftliches Programm
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CPP: Fachverband Chemische Physik und Polymerphysik
CPP 5: Polymer Networks and Elastomers I
CPP 5.4: Vortrag
Montag, 12. März 2018, 10:30–10:45, PC 203
Shear deformation of entangled and unentangled polymer networks: A Monte-Carlo-Study — •Toni Müller1,2, Michael Lang1, and Jens-Uwe Sommer1,2 — 1Leibniz-Institut für Polymerforschung Dresden — 2Technische Universität Dresden
Using a highly efficient GPU version of the bond-fluctuation model, we study the elastic properties of end-linked 4-functional model networks where we can switch off either entanglements or both entanglements and excluded volume. With that we can separate the contribution of the connectivity and the topological constraints to the shear modulus and analyze them as a function of the strain in a simple shear deformation in our computer simulations. For the connectivity contribution, we take into account network defects, finite cyclic structures and the effect of excluded volume. The splitting of the contributions to the shear modulus from the connectivity and the entanglements is assumed in theory and it is checked explicitly with our simulation data. We estimate the entanglement degree of polymerization and compare its scaling with existing studies confirming the theoretical prediction, Ne(φ)=Ne(1)φ1.3.