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Theses

Adhésifs nanostructurés en voie émulsion

Abstract : We studied adhesive and deformation properties of soft polymer films made from nanostructured latex particles. A methodology based on two rheological criteria and suitable for all kinds of PSA has been proposed to optimize adhesive performances. It allowed us to identify strategies to improve the balance between adhesion and cohesion of PSA prepared from core-shell latex particles. An interesting strategy is the activation of an interparticle crosslinking reaction during the drying of the film. The heterogeneity of the network has been varied without changing the monomer composition. This crosslinking reaction has a spectacular effect on nonlinear properties of the materials. These properties are well described by a nonlinear model constructed from the combination of the Upper-Convected Maxwell model and the Gent model. Best results are obtained with PSA prepared from latex particles with a fine and crosslinked shell and a soft only slightly crosslinked core. With a more empirical approach, promising adhesive performances have been obtained with PSA prepared from in situ tackified latexes synthesized by miniemulsion polymerization. Keywords: Adhesion, waterborne PSA, Latex particle, Heterogeneous structure, Linear viscoelasticity, Nonlinear viscoelasticity, Nonlinear elasticity.
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https://pastel.archives-ouvertes.fr/pastel-00004244
Contributor : Ecole Espci Paristech <>
Submitted on : Wednesday, October 22, 2008 - 8:00:00 AM
Last modification on : Friday, October 23, 2020 - 4:37:26 PM
Long-term archiving on: : Thursday, September 30, 2010 - 8:43:14 PM

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  • HAL Id : pastel-00004244, version 1

Citation

Fanny Deplace. Adhésifs nanostructurés en voie émulsion. Chimie. Université Pierre et Marie Curie - Paris VI, 2008. Français. ⟨pastel-00004244⟩

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