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Titolo:
Enhanced dynamic mechanical and shape-memory properties of a poly(ethyleneterephthalate)-poly(ethylene glycol) copolymer crosslinked by maleic anhydride
Autore:
Chun, BC; Cha, SH; Chung, YC; Cho, JW;
Indirizzi:
Univ Suwon, Dept Polymer Engn, Kyonggi Do 445743, South Korea Univ Suwon Kyonggi Do South Korea 445743 Kyonggi Do 445743, South Korea
Titolo Testata:
JOURNAL OF APPLIED POLYMER SCIENCE
fascicolo: 1, volume: 83, anno: 2002,
pagine: 27 - 37
SICI:
0021-8995(20020103)83:1<27:EDMASP>2.0.ZU;2-3
Fonte:
ISI
Lingua:
ENG
Keywords:
poly(ethylene terephthalate); poly(ethylene glycol); maleic anhydride; crosslinking; shape memory; modulus; copolymer;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Physical, Chemical & Earth Sciences
Engineering, Computing & Technology
Citazioni:
12
Recensione:
Indirizzi per estratti:
Indirizzo: Chun, BC Univ Suwon, Dept Polymer Engn, Kyonggi Do 445743, South Korea Univ Suwon Kyonggi Do South Korea 445743 Do 445743, South Korea
Citazione:
B.C. Chun et al., "Enhanced dynamic mechanical and shape-memory properties of a poly(ethyleneterephthalate)-poly(ethylene glycol) copolymer crosslinked by maleic anhydride", J APPL POLY, 83(1), 2002, pp. 27-37

Abstract

Dimethyl terephthalate (DMT) and ethylene glycol (EG) were used for the preparation of poly(ethylene terephthalate) (PET), and poly(ethylene glycol) (PEG) was added as a soft segment to prepare a PET-PEG copolymer with a shape-memory function. MWs of the PEG used were 200, 400, 600, and 1000 g/mol,and various molar ratios of EG and PEG were tried. Their tensile and shape-memory properties were compared at various points. The glass-transition and melting temperatures of PET-PEG copolymers decreased with increasing PEG molecular weight and content. A tensile test showed that the most ideal mechanical properties were obtained when the molar ratio of EG and PEG was setto 80:20 with 200 g/mol of PEG. The shape memory of the copolymer with maleic anhydride (MAH) as a crosslinking agent was also tested in terms of shape retention and shape recovery rate. The amount of MAH added was between 0.5 and 2.5 mol % with respect to DMT, and tensile properties and shape retention and recovery rate generally improved with increasing MAH. (C) 2002 John Wiley & Sons, Inc.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 19/01/20 alle ore 20:40:41