Storage moduli and porosity of soft PDMS polyMIPEs can be controlled independently using thiol-ene click chemistry - CNRS - Centre national de la recherche scientifique Accéder directement au contenu
Article Dans Une Revue Macromolecules Année : 2020

Storage moduli and porosity of soft PDMS polyMIPEs can be controlled independently using thiol-ene click chemistry

Résumé

Porous elastomeric polymers have been used in a wide range of applications because of their unique characteristics such as biocompatibility, gas permeability, thermal stability, and hydrophobic and dielectric properties. Poly(dimethyl siloxane) (PDMS), a commercially available elastomer, has also been shown to exhibit specific acoustic properties. However, the material properties were limited because of a lack of control over the chemistry used to prepare the cross-linked PDMS elastomer. Here, the synthesis of PDMS-based polymerized medium internal-phase emulsions (polyMIPEs) with tunable storage shear moduli (G′) has been performed using macromolecular thiol−ene reactions. Storage shear modulus values from ∼38 to ∼330 kPa were achieved by changing the stoichiometric ratio of the thiol-to-ene-functionalized PDMS, whereas the porosity of the polyMIPEs was controlled by the volume of the aqueous phase used in the emulsion formulation. Very low sound velocities (∼40 m/s) through the porous materials were recorded using acoustic characterization. Therefore, this work provides an example of the synthesis of soft polyMIPEs with possible applications as acoustic materials.

Domaines

Polymères
Fichier principal
Vignette du fichier
Macromol OMM .pdf (1.25 Mo) Télécharger le fichier
Origine : Fichiers produits par l'(les) auteur(s)
Loading...

Dates et versions

hal-02983309 , version 1 (29-10-2020)

Identifiants

Citer

Tucker J Mckenzie, Paul S Heaton, Kabir Rishi, Raj Kumar, Thomas Brunet, et al.. Storage moduli and porosity of soft PDMS polyMIPEs can be controlled independently using thiol-ene click chemistry. Macromolecules, 2020, 53 (10), pp.3719-3727. ⟨10.1021/acs.macromol.0c00217⟩. ⟨hal-02983309⟩
54 Consultations
326 Téléchargements

Altmetric

Partager

Gmail Facebook X LinkedIn More