| Téléchargement | - Voir le manuscrit accepté : Stabilization of polypropylene against γ-initiated oxidation : Stabilizer attack during radiolysis (PDF, 857 Kio)
|
|---|
| DOI | Trouver le DOI : https://doi.org/10.1016/0141-3910(92)90123-M |
|---|
| Auteur | Rechercher : Falicki, S.1; Rechercher : Carlsson, D. J.1; Rechercher : Cooke, J. M.; Rechercher : Gosciniak, D. J. |
|---|
| Affiliation | - Conseil national de recherches du Canada. Institut de technologie des procédés chimiques et de l'environnement du CNRC
|
|---|
| Format | Texte, Article |
|---|
| Résumé | The destruction of additives in γ-irradiated polypropylene films has been measured by infrared and electron spin resonance spectroscopy immediately after irradiation. Hindered amine or hindered phenol additives containing the ester group [>CH---O---C(=O)---CH₂~] were found to undergo ester destruction. Hindered amines containing the >CH~O---C(=O)---C--- group were not attacked. Phenols showed extensive loss of the phenolic ---OH group, presumably by peroxyl radical attack. Irradiation under conditions where peroxyl radicals were not formed or were scavenged competitively by the presence of a phenol prevented or reduced attack on the reactive ester linkage in hindered amines. It is possible that peroxyl radical attack is occurring at the ---CH₂--- group α to the carbonyl, which is known to be activated towards oxidation. |
|---|
| Date de publication | 1992 |
|---|
| Dans | |
|---|
| Langue | anglais |
|---|
| Publications évaluées par des pairs | Oui |
|---|
| Numéro du CNRC | NRCC 32946 |
|---|
| Numéro NPARC | 14500474 |
|---|
| Exporter la notice | Exporter en format RIS |
|---|
| Signaler une correction | Signaler une correction (s'ouvre dans un nouvel onglet) |
|---|
| Identificateur de l’enregistrement | 91b05326-efd8-437f-b65f-fe97c7bebed0 |
|---|
| Enregistrement créé | 2010-03-01 |
|---|
| Enregistrement modifié | 2020-04-23 |
|---|
