Catalogo Articoli (Spogli Riviste)

OPAC HELP

Titolo:
Elastic behaviour and low-temperature specific heat of linear and reticulated amorphous polymers
Autore:
DAngelo, G; Tripodo, G; Carini, G; Bartolotta, A; Salvato, G; Privalko, VP;
Indirizzi:
Univ Messina, Dipartimento Fis, I-98166 Messina, Italy Univ Messina Messina Italy I-98166 artimento Fis, I-98166 Messina, Italy Univ Messina, Ist Nazl Fis Mat, I-98166 Messina, Italy Univ Messina Messina Italy I-98166 Nazl Fis Mat, I-98166 Messina, Italy CNR, Ist Tecn Spettroscop, I-98166 Messina, Italy CNR Messina Italy I-98166 , Ist Tecn Spettroscop, I-98166 Messina, Italy Natl Acad Sci Ukraine, Inst Macromol Chem, UA-253160 Kyiv, Ukraine Natl Acad Sci Ukraine Kyiv Ukraine UA-253160 em, UA-253160 Kyiv, Ukraine
Titolo Testata:
PHILOSOPHICAL MAGAZINE B-PHYSICS OF CONDENSED MATTER STATISTICAL MECHANICSELECTRONIC OPTICAL AND MAGNETIC PROPERTIES
fascicolo: 11-12, volume: 79, anno: 1999,
pagine: 1889 - 1895
SICI:
1364-2812(199911/12)79:11-12<1889:EBALSH>2.0.ZU;2-
Fonte:
ISI
Lingua:
ENG
Soggetto:
FRAGILE GLASS FORMERS; EXCESS SPECIFIC-HEAT; DEPENDENCE; SCATTERING;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Physical, Chemical & Earth Sciences
Citazioni:
18
Recensione:
Indirizzi per estratti:
Indirizzo: D'Angelo, G Univ Messina, Dipartimento Fis, Contrada Papardo Salita Sperone 31, I-98166 Messina, Italy Univ Messina Contrada Papardo Salita Sperone 31 Messina Italy I-98166
Citazione:
G. D'Angelo et al., "Elastic behaviour and low-temperature specific heat of linear and reticulated amorphous polymers", PHIL MAG B, 79(11-12), 1999, pp. 1889-1895

Abstract

The mechanical characteristics in the region of the primary relaxation andthe low-temperature specific heats have been measured in linear (bisphenol-A-polycarbonate and polyurethane) and reticulated (a fully cross-linked heterocyclic network) amorphous polymers. The behaviours revealed have been analysed in order to throw light on their correlation to the polymer morphology. It is found that a cross-linked polymer shows values of fragility, anharmonicity and low-temperature specific heat which are significantly smaller than those of linear polymers, characterized by weak interchain interactions. It is also shown that the fragility appears to scale with the anharmonicity of the system, the less fragile polymer being characterized by the smallest degree of anharmonicity.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 25/11/20 alle ore 10:15:24