Synthesis of core-shell polyurethane-polydimethylsiloxane particles by polyaddition in organic dispersant media: Mechanism of particle formation

Pierre Chambon (1) , Eric Cloutet (1, 2) , Henri Cramail (1, 3)

1 LCPO - Laboratoire de Chimie des polymères organiques
2 Team 4 LCPO : Polymer Materials for Electronic, Energy, Information and Communication Technologies
3 Team 2 LCPO : Biopolymers & Bio-sourced Polymers

Core-shell polyurethane (PUR)-polydimethylsiloxane (PDMS) particles were prepared by polyaddition between ethylene glycol and tolylene-2,4-diisocyanate in cyclohexane, used as the organic dispersant phase, in the presence of reactive hydroxy-terminated polydimethylsiloxane steric stabilizers. The reaction extent and the PUR particle size, monitored by FTIR, H-1 NMR, SEC, SEM and TEM techniques against time, were found a function of the PDMS concentration, functionality and molar mass. A mechanism of the polyurethane particle growth is proposed on the grounds of the kinetic investigation.

Mots clés: core-shell particles; dispersion polymerization; polyaddition; polydimethylsiloxane; polyurethane

Domaines: Polymères

Pierre Chambon, Eric Cloutet, Henri Cramail. Synthesis of core-shell polyurethane-polydimethylsiloxane particles by polyaddition in organic dispersant media: Mechanism of particle formation. Macromolecular Symposia, 2005, 226, pp.227-238. ⟨10.1002/masy.200550821⟩. ⟨hal-00393818⟩