Synthesis of core-shell polyurethane-polydimethylsiloxane particles in cyclohexane and in supercritical carbon dioxide used as dispersant media: a comparative investigation
CLOUTET, Eric
Laboratoire de Chimie des polymères organiques [LCPO]
Team 4 LCPO : Polymer Materials for Electronic, Energy, Information and Communication Technologies
Laboratoire de Chimie des polymères organiques [LCPO]
Team 4 LCPO : Polymer Materials for Electronic, Energy, Information and Communication Technologies
CRAMAIL, Henri
Laboratoire de Chimie des polymères organiques [LCPO]
Team 2 LCPO : Biopolymers & Bio-sourced Polymers
See more >
Laboratoire de Chimie des polymères organiques [LCPO]
Team 2 LCPO : Biopolymers & Bio-sourced Polymers
CLOUTET, Eric
Laboratoire de Chimie des polymères organiques [LCPO]
Team 4 LCPO : Polymer Materials for Electronic, Energy, Information and Communication Technologies
Laboratoire de Chimie des polymères organiques [LCPO]
Team 4 LCPO : Polymer Materials for Electronic, Energy, Information and Communication Technologies
CRAMAIL, Henri
Laboratoire de Chimie des polymères organiques [LCPO]
Team 2 LCPO : Biopolymers & Bio-sourced Polymers
< Reduce
Laboratoire de Chimie des polymères organiques [LCPO]
Team 2 LCPO : Biopolymers & Bio-sourced Polymers
Language
en
Article de revue
This item was published in
Polymer. 2005, vol. 496, n° 4, p. 1057-1066
Elsevier
English Abstract
Polyurethane-polydimethylsiloxane particles of tuneable diameter in the range 0.5-5 mum, have been synthesized by step-growth polymerization, both in cyclohexane and in supercritical carbon dioxide (scCO(2)) used as ...Read more >
Polyurethane-polydimethylsiloxane particles of tuneable diameter in the range 0.5-5 mum, have been synthesized by step-growth polymerization, both in cyclohexane and in supercritical carbon dioxide (scCO(2)) used as dispersant media. The feasibility of the polyaddition between ethylene glycol and tolylene-2,4-diisocyanate, selected as monomers, was first demonstrated in cyclohexane, in the presence of hydroxy- or isocyanate-terminated polydimethylsiloxane used as a surfmer. The polymerizations were then carried out in scCO(2) at 60 degrees'C and above 200 bar, after the solubility of each reactant has been determined in scCO(2), at various pressures and temperatures. Both in cyclohexane and in scCO(2), the reaction extent was determined by means of FTIR spectroscopy. The structure and the morphology of the resulting powdery polyurethane-polydimethylsiloxane 'core-shell' material were confirmed by NMR, SEC, TEM and SEM techniques.Read less <
English Keywords
dispersion
step-growth polymerization
polyurethane
Origin
Hal imported