Glass Transition Accelerates the Spreading of Polar Solvents on a Soluble Polymer - Archive ouverte HAL Accéder directement au contenu
Article Dans Une Revue Physical Review Letters Année : 2014

Glass Transition Accelerates the Spreading of Polar Solvents on a Soluble Polymer

Résumé

We study the wetting of polymer layers by polar solvents. As previously observed, when a droplet of solvent spreads, both its contact angle and velocity decrease with time as a result of solvent transfers from the droplet to the substrate. We show that, when the polymer is initially glassy, the angle decreases steeply for a given value of the velocity, Ug. We demonstrate that those variations result from a plasticization, i.e. a glass transition, undergone by the polymer layer during spreading, owing to the increase of its solvent content. By analyzing previous predictions on the wetting of rigid and soft viscoelastic substrates, we relate Ug to the viscosity of the polymer gel close to glass transition. Finally, we derive an analytical prediction for Ug, based on existing predictions for the water transfer from the droplet to the substrate. Using polar solvents of different natures, we show that the experimental data compares well to the predicted expression for Ug.
Fichier principal
Vignette du fichier
papier glass transition_short_bibfixed.pdf (380.78 Ko) Télécharger le fichier
Origine : Fichiers produits par l'(les) auteur(s)
Loading...

Dates et versions

hal-01406913 , version 1 (01-12-2016)

Identifiants

Citer

Julien Dupas, Emilie Verneuil, Maxime van Landeghem, Bruno Bresson, Laurent Forny, et al.. Glass Transition Accelerates the Spreading of Polar Solvents on a Soluble Polymer. Physical Review Letters, 2014, 112 (18), pp.188302 ⟨10.1103/PhysRevLett.112.188302⟩. ⟨hal-01406913⟩
128 Consultations
216 Téléchargements

Altmetric

Partager

Gmail Facebook X LinkedIn More