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Titolo:
Oxidation of polyterpenes: a comparison of poly alpha, and poly beta, pinenes behaviours - Part I - photo-oxidation
Autore:
Binet, ML; Commereuc, S; Chalchat, JC; Lacoste, J;
Indirizzi:
Univlermont Pascal, CNRS, UMR 6505, Lab Photochim Mol & Macromol, F-63177 C Univ Blaise Pascal Clermont Ferrand France F-63177 & Macromol, F-63177 C ENS Chim Clermont Ferrand, F-63177 Clermont Ferrand, France ENS Chim Clermont Ferrand Clermont Ferrand France F-63177 errand, France
Titolo Testata:
JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY A-CHEMISTRY
fascicolo: 1, volume: 120, anno: 1999,
pagine: 45 - 53
SICI:
1010-6030(19990104)120:1<45:OOPACO>2.0.ZU;2-Q
Fonte:
ISI
Lingua:
ENG
Soggetto:
CATIONIC POLYMERIZATION; ELASTOMERIC MATERIALS; OXIDIZED POLYOLEFINS; BINARY CATALYSTS; LONG WAVELENGTHS; PHOTOOXIDATION; IDENTIFICATION; PRODUCTS; RUBBER; RESINS;
Keywords:
polyterpenes; photo-oxidation; FTIR spectroscopy; photoproducts;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Physical, Chemical & Earth Sciences
Citazioni:
31
Recensione:
Indirizzi per estratti:
Indirizzo: Commereuc, S Univlermont Pascal, CNRS, UMR 6505, Lab Photochim Mol & Macromol, F-63177 C Univ Blaise Pascal Clermont Ferrand France F-63177 -63177 C
Citazione:
M.L. Binet et al., "Oxidation of polyterpenes: a comparison of poly alpha, and poly beta, pinenes behaviours - Part I - photo-oxidation", J PHOTOCH A, 120(1), 1999, pp. 45-53

Abstract

The photo-oxidation of polypinenes has been investigated through irradiation at lambda > 300 nm at 35 degrees C. We pay attention to the similaritiesand differences in behaviour of the two most commonly used polyterpene resins based on alpha, and beta, pinenes. The major photoproducts resulting from oxidation have been identified and quantified using well-known derivatization reactions, specific chemical analysis and physical treatments. From our results, photochemical evolution of poly alpha, pinene is quite similar to that of poly beta, pinene. alpha, beta unsaturated hydroperoxides are assumed to be the main primary photoproducts which undergo photolysis into various alpha, beta unsaturated species. In contrast to dienic polymers, through irradiation, saturation reactions occur in a significant low extent andchain-scissions prevail leading to low molecular weight by-products that can easily diffuse out of the polymer matrix. (C) 1999 Elsevier Science S.A. All rights reserved.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 25/11/20 alle ore 07:29:36