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Titolo:
DYNAMIC-MECHANICAL BEHAVIOR OF FLUORINATED AROMATIC POLY(ETHERS)
Autore:
GOODWIN AA; MERCER FW;
Indirizzi:
MONASH UNIV CLAYTON VIC 3168 AUSTRALIA RAYCHEM CORP MENLO PK CA 94025
Titolo Testata:
Journal of polymer science. Part B, Polymer physics
fascicolo: 12, volume: 35, anno: 1997,
pagine: 1963 - 1971
SICI:
0887-6266(1997)35:12<1963:DBOFAP>2.0.ZU;2-O
Fonte:
ISI
Lingua:
ENG
Soggetto:
MOLECULAR-STRUCTURE; DECAY FUNCTION; ETHER KETONE); RELAXATION; POLYIMIDES; MOBILITY;
Keywords:
DYNAMIC MECHANICAL ANALYSIS; FLUORINATED POLY(ETHERS); INTERMOLECULAR COOPERATIVITY; RELAXATION BEHAVIOR;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Science Citation Index Expanded
Citazioni:
37
Recensione:
Indirizzi per estratti:
Citazione:
A.A. Goodwin e F.W. Mercer, "DYNAMIC-MECHANICAL BEHAVIOR OF FLUORINATED AROMATIC POLY(ETHERS)", Journal of polymer science. Part B, Polymer physics, 35(12), 1997, pp. 1963-1971

Abstract

The relaxation behavior of six fluorinated aromatic poly( ethers) wasinvestigated using dynamic mechanical analysis. The glass transition temperature was found to increase as the size and rigidity of linking groups increased and varied between 168 degrees C for a dimethyl linking group and 300 degrees C for a bicyclic benzoate ether-linking group. For the alpha-relaxation the steepness of time/temperature plots andbroadness of the loss curves could be qualitatively correlated with chemical structure in a manner predicted by the coupling model of relaxation. Well-separated sub-T-g transitions were also observed, as a shoulder on the low temperature side of the alpha-peak, and as a broad, low loss transition around -100 degrees C. The higher temperature process was similar to the structural relaxation often found in quenched glassy polymers, while the position, intensity, and breadth of the subambient process was sensitive to chemical structure. (C) 1997 John Wiley& Sons, Inc.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 27/09/20 alle ore 22:14:54