REGLERO, José Antonio; VIOT, Philippe; DUMON, Michel

doi:10.1177/0021955X11415925

Métadonnées

Afficher la notice complète

Licence d’utilisation du document

REGLERO, José Antonio
Laboratoire de Chimie des Polymères Organiques [LCPO]

VIOT, Philippe

DUMON, Michel
Laboratoire de Chimie des Polymères Organiques [LCPO]
Team 1 LCPO : Polymerization Catalyses & Engineering

Langue

Article de revue

Ce document a été publié dans

Journal of Cellular Plastics. 2011-11-01, vol. 47, n° 6, p. 535-548

SAGE Publications

Résumé en anglais

Supercritical CO2 (scCO(2)) is used as a medium for foaming amorphous polymers. A study of the solubility of supercritical CO2 in several amorphous polymers (PS and PMMA) and blends is performed, followed by an investigation of the foaming behavior of the polymer-gas systems. Nano-structuring triblock copolymers (styrene-co-butadiene-co-methylmethacrylate SBM and methylmethacrylate-co-butylacrylate-co-methylmethacrylate MAM) were blended as additives to PS or PMMA by extrusion. The addition of these triblock copolymers results in an important weight gain ratio of gas in a wide range of temperatures (from 25 to 80 degrees C), relating this weight gain ratio to the foaming behavior of the blends (CO2 is preferentially located in the micro or nano-domains issued from the structuration of the block copolymer). Foaming is carried out in a batch one-step scCO(2) process, keeping constant the saturation pressure and depressurization rate (300 bar and 60 bar/min, respectively). Influence of saturation temperature (25-85 degrees C) on the final porous structure is shown. In spite of the influence of the terpolymer on the weight gain ratio, the structuration is believed to provide a good control of microcellular foams in PS and PMMA.< Réduire

Mots clés en anglais

microcellular foaming

solubility

amorphous polymers

supercritical CO2

block copolymers

Métadonnées

Partager cette publication !

Licence d’utilisation du document

Foaming of amorphous polymers and blends in supercritical CO2: Solubility versus block copolymers addition

Langue

Ce document a été publié dans

Résumé en anglais

Mots clés en anglais

URI

DOI

Origine

Unités de recherche