Organopolymérisations du méthacrylate de méthyle induites par les carbène N-hétérocycliques et par des paires de Lewis organiques

Abstract : The reactivity of imidazol-ylidene N-heterocyclic carbenes (NHCs) as direct initiators for the polymerization of miscellaneous (meth)acrylic monomers, mainly methylmethacrylate (MMA), has been screened in the absence of any other co-activator.Different reactivities have been observed according to the structure of the NHC and thenature of the substrate. Computational studies allowed rationalizing steric and electroniceffects involved in these reactions.The use of a peculiar NHCs as catalyst for the polymerization of MMA using alcohols as initiators has then been investigated. This simple and efficient method also allows achieving amphiphilic block copolymers by using hydroxylated poly(ethylene oxide)s asmacro-initiators. Combined computational and experimental investigations have provided insights into the mechanism of polymerization.Various Lewis pairs including a silicon-based compound as acid and NHC or a trialkyl(aryl)phosphine as base, have been investigated to trigger an efficient polymerization of MMA.In this case, the polymerization is expected to proceed via a cooperative/dual activation mechanism.
Document type :
Theses
Complete list of metadatas

Cited literature [9 references]  Display  Hide  Download

https://tel.archives-ouvertes.fr/tel-01469993
Contributor : Abes Star <>
Submitted on : Friday, February 17, 2017 - 1:01:17 AM
Last modification on : Saturday, October 5, 2019 - 3:21:52 AM
Long-term archiving on : Thursday, May 18, 2017 - 1:27:10 PM

File

NZAHOU_OTTOU_WINNIE_2014.pdf
Version validated by the jury (STAR)

Identifiers

  • HAL Id : tel-01469993, version 1

Collections

Citation

Winnie Nzahou Ottou. Organopolymérisations du méthacrylate de méthyle induites par les carbène N-hétérocycliques et par des paires de Lewis organiques. Polymères. Université de Bordeaux, 2014. Français. ⟨NNT : 2014BORD0303⟩. ⟨tel-01469993⟩

Share

Metrics

Record views

219

Files downloads

245