Conférence - Kurt Kremer: Topology Effects: Playing with Entanglements to Structure Polymer Melts

Épisode de Collège de France - Sélection par Collège de France · 9 septembre 2026 · 52 min

Jean-François Joanny

Matière molle et biophysique

Collège de France

Année 2026-2027

Computational Soft Matter/Polymer Physics

Conférence - Kurt Kremer: Topology Effects: Playing with Entanglements to Structure Polymer Melts

Kurt Kremer

Max Planck Institute for Polymer Research

Résumé

The dynamics of dense polymer systems of long chains is governed by the fact that chains cannot cut through each other during their diffusive motion. These (temporary) topological constraints create what is called entanglements and dominate the rheological properties of long chain polymer melts and dense solutions. They lead to the well established reptation/tube model, which is at the basis of our understanding of many physical properties and technical processes. While in most technology related investigations entanglements are seen as a problem to deal with, one also can systematically employ them to manipulate and structure materials, either by avoiding or explicitly using/introducing entanglements. The lecture will give a few such examples, which range from non-entangled to highly entangled polymer systems and to new entanglement stabilized nanoporous films or topological glasses in active systems.

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