Melt radical grafting of diethylmaleate and maleic anhydride onto oligoamide-11 (OA11) and polyamide-11 (PA11) in presence of acyloxyimide derivatives: Toward the compatibilization of PA11/EVOH blends

Marc Baron (1) , Mamy-Daniel Rakotorinina (2) , Mohamed Ihab El Assil (1) , Yohann Guillaneuf (2) , Didier Gigmes (2) , Didier Siri (2) , Anouk Gaudel-Siri (2) , Jean-Jacques Flat (3) , Sébastien Quinebeche (3) , Philippe Cassagnau (1) , Emmanuel Beyou (1)

1 IMP - Ingénierie des Matériaux Polymères
2 ICR - Institut de Chimie Radicalaire
3 CERDATO - Centre de recherche, développement, applications et technique de l'ouest

For the first time, the melt radical grafting of diethylmaleate (DEM) and maleic anhydride (MA) onto oligoamide-11 (OA11) and polyamide-11 (PA11) was performed in presence of new acyloxyimide derivatives in the temperature range 190 °C–250 °C in an autoclave and a mini-extruder, respectively. The DEM grafting degree was studied as a function of reaction temperature, the DEM concentration, the acyloxyimide concentration and its chemical structure. The degree of grafting of DEM was determined by 1H NMR and we obtained a DES (diethylsuccinimate) functionalization degree (FD) as high as 9 mol% onto OA11 when using tBu-NAPI as H-abstractor at 230 °C. However, the transposition of this grafting reaction at a pilot scale did not permit to obtain such a high DES FD while the morphological study of PA11/EVOH blends with the grafted copolymer did not significantly improve the adhesion between the two phases.

Domaines: Chimie

Marc Baron, Mamy-Daniel Rakotorinina, Mohamed Ihab El Assil, Yohann Guillaneuf, Didier Gigmes, et al.. Melt radical grafting of diethylmaleate and maleic anhydride onto oligoamide-11 (OA11) and polyamide-11 (PA11) in presence of acyloxyimide derivatives: Toward the compatibilization of PA11/EVOH blends. Materials Today Communications, 2019, 19, pp.271-276. ⟨10.1016/j.mtcomm.2019.02.003⟩. ⟨hal-02053478⟩