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CPP: Fachverband Chemische Physik und Polymerphysik

CPP 18: Poster: Polymer Dynamics

CPP 18.15: Poster

Dienstag, 12. März 2013, 18:15–20:15, Poster C

Synthesis and dynamic studies of H-bonded double networks — •Barbara Gold, Wim Pyckhout-Hintzen, Claas Hövelmann, Jürgen Allgaier, Ana Bras, Andreas Wischnewski, and Dieter Richter — Forschungszentrum Jülich GmbH, Jülich Centre for Neutron Science (JCNS-1) & Institute of Complex Systems (ICS-1), 52425 Jülich

In the framework of a recently granted EU project on SelfHealing Innovative Elastomers (SHINE) newly developed elastomers containing both permanent and/or transient crosslinks in different concentrations in rubbers will be investigated by different measurement methods.

The chemical concept of SHINE involves two types of linkages in the molecular structure of the self-healing elastomers: strong covalent bonds that do not undergo reversible changes to provide strength and rigidity to the material and transient bonds that thermodynamically can be broken. Re-combination of the broken segments will result in the novel self-healing properties.

We present the synthesis of our model network, which consists of monodisperse polydienes (PI) where the backbone and extremities are modified with H-bonding active groups. Furthermore first results of rheological experiments will be shown to get a basic impression of how chain dynamics change due to the networking process and will be influenced of thus permanent and transient crosslinks with respect to self-healing mechanism.