Peroxide grafted PDMS: hydrosilylation reaction study and thiol-ene chemistry as an alternative pathway

Patrice Lucas (1) , Etienne Fleury (2) , Jean-François Estur (3) , Vincent Lapinte (1) , Jean Jacques Robin (1)

1 ICGM ICMMM - Institut Charles Gerhardt Montpellier - Institut de Chimie Moléculaire et des Matériaux de Montpellier
2 IMP-LMM - Ingénierie des Matériaux Polymères - Laboratoire des Matériaux Macromoléculaires
3 LOF - Laboratoire du Futur

Peroxide containing PDMS were synthesized according to a new pathway. Although hydrosilylation is one of the main reaction carried out in silicone chemistry, the catalysts used are very sensitive to the chemical nature of the reactants and remained inefficient to graft allylic peroxide. Radical catalyzed thiol-ene chemistry was involved for the first time to yield an initiator group containing polymer. Peroxide grafted polysiloxane structure and decomposition were characterized using 1H, 13C and 29Si NMR, FT-IR and RAMAN spectroscopies, SEC and DSC. These macroinitiators can be used to obtain polysiloxane able to undergo cross-linking.

Mots clés: Polysiloxane; hydrosilylation; peroxide; thiol-ene reaction

Domaines: Polymères

Patrice Lucas, Etienne Fleury, Jean-François Estur, Vincent Lapinte, Jean Jacques Robin. Peroxide grafted PDMS: hydrosilylation reaction study and thiol-ene chemistry as an alternative pathway. Macromolecular Chemistry and Physics, 2009, 210, pp.1933-1941. ⟨10.1002/macp.200900310⟩. ⟨hal-00438513⟩