Salen Complexes as Fire Protective Agents ...
Type de document :
Article dans une revue scientifique
DOI :
URL permanente :
Titre :
Salen Complexes as Fire Protective Agents for Thermoplastic Polyurethane: Deep Electron Paramagnetic Resonance Spectroscopy Investigation
Auteur(s) :
Naik, Anil D. [Auteur]
Unité Matériaux et Transformations - UMR 8207 [UMET]
Bourbigot, Serge [Auteur]
Unité Matériaux et Transformations - UMR 8207 [UMET]
Bellayer, Séverine [Auteur]
Unité Matériaux et Transformations - UMR 8207 [UMET]
Touati, Nadia [Auteur]
Laboratoire Avancé de Spectroscopie pour les Intéractions la Réactivité et l'Environnement - UMR 8516 [LASIRE]
Ben Tayeb Meziane, Karima [Auteur]
Laboratoire Avancé de Spectroscopie pour les Intéractions la Réactivité et l'Environnement - UMR 8516 [LASIRE]
Laboratoire Avancé de Spectroscopie pour les Intéractions la Réactivité et l'Environnement (LASIRE) - UMR 8516
Vezin, Herve [Auteur]
Laboratoire Avancé de Spectroscopie pour les Intéractions la Réactivité et l'Environnement - UMR 8516 [LASIRE]
Fontaine, Gaelle [Auteur]
Unité Matériaux et Transformations - UMR 8207 [UMET]
Ingénierie des Systèmes Polymères
Unité Matériaux et Transformations - UMR 8207 [UMET]
Bourbigot, Serge [Auteur]
Unité Matériaux et Transformations - UMR 8207 [UMET]
Bellayer, Séverine [Auteur]
Unité Matériaux et Transformations - UMR 8207 [UMET]
Touati, Nadia [Auteur]
Laboratoire Avancé de Spectroscopie pour les Intéractions la Réactivité et l'Environnement - UMR 8516 [LASIRE]
Ben Tayeb Meziane, Karima [Auteur]
Laboratoire Avancé de Spectroscopie pour les Intéractions la Réactivité et l'Environnement - UMR 8516 [LASIRE]
Laboratoire Avancé de Spectroscopie pour les Intéractions la Réactivité et l'Environnement (LASIRE) - UMR 8516
Vezin, Herve [Auteur]
Laboratoire Avancé de Spectroscopie pour les Intéractions la Réactivité et l'Environnement - UMR 8516 [LASIRE]
Fontaine, Gaelle [Auteur]
Unité Matériaux et Transformations - UMR 8207 [UMET]
Ingénierie des Systèmes Polymères
Titre de la revue :
ACS Applied Materials & Interfaces
Nom court de la revue :
ACS Appl. Mater. Interfaces
Numéro :
10
Pagination :
24860-24875
Éditeur :
American Chemical Society (ACS)
Date de publication :
2018-06-29
Discipline(s) HAL :
Chimie
Chimie/Matériaux
Chimie/Matériaux
Résumé en anglais : [en]
The contribution to flame retard thermoplastic polyurethane (TPU) of Copper complexes of
Salen based Schiff bases N,N’-bis(salicylidene)ethylenediamine (C1), N,N’-bis(4-
hydroxysalicylidene)ethylenediamine (C2) and ...
Lire la suite >The contribution to flame retard thermoplastic polyurethane (TPU) of Copper complexes of Salen based Schiff bases N,N’-bis(salicylidene)ethylenediamine (C1), N,N’-bis(4- hydroxysalicylidene)ethylenediamine (C2) and N,N’-bis(5- hydroxysalicylidene)ethylenediamine (C3) is investigated in the context of minimizing TPU inherent flammability. Thermal and fire properties of TPU are evaluated. It is observed that fire performances vary depending upon the substitution of Salen framework. Cone calorimetry (MLC) results show that, in TPU at 10 wt.-% loading, C2 and C3 reduce peak of heat release (pHRR) by 46 and 50% respectively. At high temperature, these copper complexes undergo polycondensation leading to resorcinol type resin in the condensed phase and thus acting as intumescence reinforcing agents. C3 in TPU is particularly interesting since it delays significantly the time to ignition (MLC experiment). In addition, Pyrolysis combustion flow calorimetry (PCFC) shows reduction in HRR curve suggesting its involvement in gas phase action. Structural changes of copper complexes and radical formation during thermal treatment as well as their influence on fire retardancy of TPU in the condensed phase is investigated by spectroscopic studies supported by microscopic and powder diffraction studies. Electron paramagnetic resonance spectroscopy (EPR) was fully used to follow redox changes of Cu(II) ions as well as radical formation of copper complexes/TPU formulations in their degradation pathways. Pulsed EPR technique of Hyperfine Sublevel Correlation Spectroscopy (HYSCORE) reveals evolution of local surrounding of copper and radicals with strong contribution of nitrogen fragments in the degradation products. Further, spin state of radicals were investigated by 2D technique of Phase-inverted Echo-Amplitude detected Nutation (PEANUT) experiment. Two different radicals were detected i.e. one mono carbon radical and an oxygen biradical. Thus, the EPR study permits to deeply investigate the mode of action of copper salen complexes in TPU.Lire moins >
Lire la suite >The contribution to flame retard thermoplastic polyurethane (TPU) of Copper complexes of Salen based Schiff bases N,N’-bis(salicylidene)ethylenediamine (C1), N,N’-bis(4- hydroxysalicylidene)ethylenediamine (C2) and N,N’-bis(5- hydroxysalicylidene)ethylenediamine (C3) is investigated in the context of minimizing TPU inherent flammability. Thermal and fire properties of TPU are evaluated. It is observed that fire performances vary depending upon the substitution of Salen framework. Cone calorimetry (MLC) results show that, in TPU at 10 wt.-% loading, C2 and C3 reduce peak of heat release (pHRR) by 46 and 50% respectively. At high temperature, these copper complexes undergo polycondensation leading to resorcinol type resin in the condensed phase and thus acting as intumescence reinforcing agents. C3 in TPU is particularly interesting since it delays significantly the time to ignition (MLC experiment). In addition, Pyrolysis combustion flow calorimetry (PCFC) shows reduction in HRR curve suggesting its involvement in gas phase action. Structural changes of copper complexes and radical formation during thermal treatment as well as their influence on fire retardancy of TPU in the condensed phase is investigated by spectroscopic studies supported by microscopic and powder diffraction studies. Electron paramagnetic resonance spectroscopy (EPR) was fully used to follow redox changes of Cu(II) ions as well as radical formation of copper complexes/TPU formulations in their degradation pathways. Pulsed EPR technique of Hyperfine Sublevel Correlation Spectroscopy (HYSCORE) reveals evolution of local surrounding of copper and radicals with strong contribution of nitrogen fragments in the degradation products. Further, spin state of radicals were investigated by 2D technique of Phase-inverted Echo-Amplitude detected Nutation (PEANUT) experiment. Two different radicals were detected i.e. one mono carbon radical and an oxygen biradical. Thus, the EPR study permits to deeply investigate the mode of action of copper salen complexes in TPU.Lire moins >
Langue :
Anglais
Comité de lecture :
Oui
Audience :
Non spécifiée
Collections :
Équipe(s) de recherche :
Ingénierie des Systèmes Polymères
Propriétés magnéto structurales des matériaux (PMSM)
Propriétés magnéto structurales des matériaux (PMSM)
Date de dépôt :
2019-03-25T15:43:47Z
2019-04-03T10:19:20Z
2019-11-19T14:30:34Z
2019-04-03T10:19:20Z
2019-11-19T14:30:34Z
Fichiers
- 2018 07 Cu TPU EPR VF ACS applied Surf and Interf-.pdf
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