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Quelques Propriétés des Polymères en Couches Minces

Abstract : In this thesis we address some properties of thin layers of polymer.
In a first part we study the adhesion and friction behavior of a polymer chains layer grafted onto a flat solid substrate. We first model the interdigitation between this "brush" and an elastomer in contact, either static or in horizontal translation. We point out this way some saturation phenomenon at hight grafting density. We look then the energy dissipation mechanisms related to the pool out of the chains from the elastomer when it separates from the solid surface, or when it slides on it.
In the second part of the thesis we study several features of the stability of thin polymer films deposited on a slippery substrate, such as the brushes studied in the first part. We are interested in the consequences of viscoelasticity on the growth of surface instability, and on the dewetting of the films. We show in particular that residual stresses, which can be stored in the films due to their viscoelasticity, are a source of destabilization for polymer films, and accelerate the dewetting process. The friction between the film and the substrate appear as a decisive parameter of the instability and dewetting dynamics.
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Submitted on : Monday, July 3, 2006 - 2:56:51 PM
Last modification on : Friday, January 14, 2022 - 8:46:03 AM
Long-term archiving on: : Monday, April 5, 2010 - 11:43:05 PM


  • HAL Id : tel-00083656, version 1


Thomas Vilmin. Quelques Propriétés des Polymères en Couches Minces. Analyse de données, Statistiques et Probabilités []. Université Pierre et Marie Curie - Paris VI, 2006. Français. ⟨tel-00083656⟩



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