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Titolo:
Antioxidant effectiveness of vitamin E in HDPE and tetradecane at 32 degrees C
Autore:
Mallegol, J; Carlsson, DJ; Deschenes, L;
Indirizzi:
Natl Res Council, Inst Chem Proc & Environm Technol, Ottawa, ON K1J 7E6, Canada Natl Res Council Ottawa ON Canada K1J 7E6 nol, Ottawa, ON K1J 7E6, Canada Agr & Agri Food Canada, Ctr Food Res & Dev, St Hyacinthe, PQ J2S 8E3, Canada Agr & Agri Food Canada St Hyacinthe PQ Canada J2S 8E3 PQ J2S 8E3, Canada
Titolo Testata:
POLYMER DEGRADATION AND STABILITY
fascicolo: 2, volume: 73, anno: 2001,
pagine: 269 - 280
SICI:
0141-3910(2001)73:2<269:AEOVEI>2.0.ZU;2-X
Fonte:
ISI
Lingua:
ENG
Soggetto:
ALPHA-TOCOPHEROL; TRANSFORMATION PRODUCTS; PHENOLIC ANTIOXIDANTS; INITIATED OXIDATION; PEROXYL RADICALS; POLYPROPYLENE; POLYETHYLENE; POLYOLEFINS; POLYMERS; STABILIZATION;
Keywords:
HDPE oxidation; tetradecane oxidation; vitamin E antioxidant; gamma initiation;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Physical, Chemical & Earth Sciences
Citazioni:
38
Recensione:
Indirizzi per estratti:
Indirizzo: Carlsson, DJ Natl Res Council, Inst Chem Proc & Environm Technol, Ottawa, ON K1J 7E6, Canada Natl Res Council Ottawa ON Canada K1J 7E6 ON K1J 7E6, Canada
Citazione:
J. Mallegol et al., "Antioxidant effectiveness of vitamin E in HDPE and tetradecane at 32 degrees C", POLYM DEGR, 73(2), 2001, pp. 269-280

Abstract

Vitamin E was found to be a very effective antioxidant both in a model, liquid alkane, (teradecane) and in HDPE when oxidations at close to room temperature were initiated with gamma -radiation. FTIR was used to follow changes in vitamin E in oxidising tetradecane and HDPE, even at very low concentrations of the antioxidant. Formation of isolated hydroperoxide groups as adirect result of the vitamin E-peroxyl radical reaction were clearly visible. Quinone products from vitamin E were formed during gamma -irradiation, but different quinones were formed depending on the vitamin E concentrations. Vitamin E quite effectively retarded the oxidation of HDPE during gamma -irradiation and so should be useful in polyethylene intended for radiationsterilisation, as packaging materials or medical devices. Crown copyright (C) 2001 Published by Elsevier Science Ltd. All rights reserved.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 14/07/20 alle ore 13:06:29