Synthesis of polyurethane particles in supercritical carbon dioxide using organocatalysts or organocatalytic surfactants
CRAMAIL, Henri
Laboratoire de Chimie des Polymères Organiques [LCPO]
Team 2 LCPO : Biopolymers & Bio-sourced Polymers
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Laboratoire de Chimie des Polymères Organiques [LCPO]
Team 2 LCPO : Biopolymers & Bio-sourced Polymers
Language
en
Article de revue
This item was published in
Green Chemistry. 2013, vol. 15, n° 10, p. 2769-2776
Royal Society of Chemistry
English Abstract
The influence of amine oxide catalysis has been investigated in the dispersion polymerisation of 2,4-toluenediisocyanate with 1,4-butanediol in supercritical carbon dioxide. In reactions stabilised by a diisocyanate ...Read more >
The influence of amine oxide catalysis has been investigated in the dispersion polymerisation of 2,4-toluenediisocyanate with 1,4-butanediol in supercritical carbon dioxide. In reactions stabilised by a diisocyanate terminated polydimethylsiloxane (PDMS) macromonomer, the concentration of N-methyl-morpholine N-oxide (NMO) catalyst has an impact on both the molecular weight and particle morphology of the polyurethanes (PUs) produced. Leading on from this, amine oxide catalyst groups have been grafted onto PDMS chains in order to construct catalytic surfactants or 'catasurfs'. At a sufficient concentration of the catasurf and with an appropriate molecular weight of PDMS, well-defined PU particles of micrometric size are produced. Furthermore, the PDMS can subsequently be removed from the particles to yield a PU material of high purity.Read less <
English Keywords
POLY(METHYL METHACRYLATE) PARTICLES
DISPERSION POLYMERIZATION
GENERATION
FOAMS
Origin
Hal imported