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Titolo:
A differential scanning calorimetry method to study polymer photoperoxidation
Autore:
Ouldmetidji, Y; Gonon, L; Commereuc, S; Verney, V;
Indirizzi:
Univ Clermont Ferrand, Photochim Mol & Macromol Lab, CNRS, UMR 6505, F-63177 Aubiere, France Univ Clermont Ferrand Aubiere France F-63177 05, F-63177 Aubiere, France
Titolo Testata:
POLYMER TESTING
fascicolo: 7, volume: 20, anno: 2001,
pagine: 765 - 768
SICI:
0142-9418(200110)20:7<765:ADSCMT>2.0.ZU;2-Z
Fonte:
ISI
Lingua:
ENG
Keywords:
DSC; peroxide; photo-oxidation;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Engineering, Computing & Technology
Citazioni:
10
Recensione:
Indirizzi per estratti:
Indirizzo: Gonon, L Univ Clermont Ferrand, Photochim Mol & Macromol Lab, CNRS, UMR 6505, F-63177 Aubiere, France Univ Clermont Ferrand Aubiere France F-63177 77 Aubiere, France
Citazione:
Y. Ouldmetidji et al., "A differential scanning calorimetry method to study polymer photoperoxidation", POLYM TEST, 20(7), 2001, pp. 765-768

Abstract

A main challenge in the field of polymer aging is the detection of extremely small amounts of peroxide formed in the primary steps of oxidation. Thisis a necessary condition to be able to predict physical changes and to remedy the resulting loss of proper-ties. All experiments carried out to assess the properties of peroxide species are generally based on direct or indirect chemical titration. However, all of these techniques are limited by themolecular accessibility of chemical reagents in the macromolecular medium. As the decomposition of these species is known to be strongly exothermic, we used differential scanning calorimetry (DSC) measurements to quantify the level of peroxides formed from the photo-oxidation carried out under accelerated conditions. This method appears to be more sensitive than chemical titration in the detection of small amounts of peroxide structures. Moreover, it gives additional information such as their thermal range and kineticsof decomposition. (C) 2001 Elsevier Science Ltd. All rights reserved.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 30/11/20 alle ore 10:12:19