In situ EPR investigation of sulfur vulcanization mechanism and ageing process

Ben Tayeb Meziane, Karima; Eliard, C.; Vezin, Herve; Gabrielle, B.; Delebecq, E.; Gomez, E.

Type de document :

Article dans une revue scientifique: Article original

DOI :

10.1016/j.polymdegradstab.2022.110066

URL permanente :

http://hdl.handle.net/20.500.12210/76022

Titre :

In situ EPR investigation of sulfur vulcanization mechanism and ageing process

Auteur(s) :

Ben Tayeb Meziane, Karima [Auteur]

Laboratoire Avancé de Spectroscopie pour les Intéractions la Réactivité et l'Environnement (LASIRE) - UMR 8516
Eliard, C. [Auteur]
Laboratoire Avancé de Spectroscopie pour les Intéractions la Réactivité et l'Environnement - UMR 8516 [LASIRE]
Vezin, Herve [Auteur]

Laboratoire Avancé de Spectroscopie pour les Intéractions la Réactivité et l'Environnement (LASIRE) - UMR 8516
Gabrielle, B. [Auteur]
Delebecq, E. [Auteur]
Gomez, E. [Auteur]

Titre de la revue :

Polymer Degradation and Stability

Pagination :

110066

Éditeur :

Elsevier BV

Date de publication :

2022-09

ISSN :

0141-3910

Discipline(s) HAL :

Chimie/Chimie théorique et/ou physique

Résumé en anglais : [en]

The purpose of this investigation was to determine the nature of radicals present on Natural rubber and poly isoprene system. The qualification and quantification of radicals was made by using Electron Paramagnetic Resonance ...
Lire la suite >The purpose of this investigation was to determine the nature of radicals present on Natural rubber and poly isoprene system. The qualification and quantification of radicals was made by using Electron Paramagnetic Resonance spectroscopy (EPR). The mechanism of vulcanization has been studied in order to understand the formation of organic radicals. This could give us indications as to the nature of the sulfur chains formed during the process. Thanks to the in situ EPR we were able to highlight the formation of radicals S3•− which quickly transforms into a stable carbon radical. We can therefore assume in this radical mechanism that the length of sulfur chains observed is 3 sulfur. Sulfur containing more than 3 atoms would be created following an ionic pathway. These results have led us, once the radicals formed have been stabilized, to study the phenomena of thermal aging by monitoring the nature and quantity of radicals formed over longer times. These results allowed us to show the existence of oxygen vacancies which are transient species linked to the presence of ZnO used as an activator of vulcanization.Lire moins >

Langue :

Anglais

Comité de lecture :

Oui

Audience :

Internationale

Vulgarisation :

Non

Établissement(s) :

Université de Lille
CNRS

Collections :

Laboratoire Avancé de Spectroscopie pour les Intéractions la Réactivité et l'Environnement (LASIRE) - UMR 8516

Équipe(s) de recherche :

Propriétés magnéto structurales des matériaux (PMSM)

Date de dépôt :

2022-07-22T09:50:34Z
2022-08-24T08:34:13Z

Fichiers

PDS_2022.pdf
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Numéro de version	Lien	Date de modification
2	20.500.12210/76022*	2022-08-24T08:29:58Z
1	20.500.12210/76022.1	2022-07-22T09:50:34Z

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In situ EPR investigation of sulfur ...

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