Berlin 2012 – wissenschaftliches Programm
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CPP: Fachverband Chemische Physik und Polymerphysik
CPP 33: Polymer Dynamics
CPP 33.1: Topical Talk
Donnerstag, 29. März 2012, 09:30–10:00, C 264
Neutron Scattering Studies on Self-Healing Model Polymers — •Ana Rita Brás1, Jessalyn Cortese2, Corinne Soulié-Ziakovic2, François Tournilhac2, Jürgen Allgaier1, Wim Pyckhout-Hintzen1, Andreas Wischnewski1, Ludwik Leibler2, and Dieter Richter1 — 1Forschungszentrum Jülich, JCNS-1/ICS-1, D52425 Jülich, Germany — 2Matière Molle et Chimie, ESPCI-CNRS (UMR7167), France
Supramolecular polymers are an increasingly important class of polymers, where designed intermolecular interactions allow a specific tailoring of polymer properties. One of the most recent additions to this field are self-healing polymers, which base on the hydrogen-bonding interaction of groups on parts of the molecules. Neutron scattering measurements were performed on recently synthesized model systems, using DNA-inspired end-groups like Thymine-1-acetic acid, Diaminotriazine and 2-aminoethyl-imidazolidone with properties closer to natural materials. The backbone was polypropylene(glycol) and polyethylene(glycol) based polymer, respectively. The end-functionalization allowed going from one to three reactive sites, shifting the association equilibrium to bonding. Both Small Angle Neutron Scattering and Neutron Spin-Echo allowed to quantitatively access the assembly process thus probing the hydrogen-bonding association mechanism. Results of these measurements will be presented. For the first time such an association process was observed on quasielastic neutron scattering time scale.