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Titolo:
STUDIES ON A MISCIBLE POLYIMIDE BLEND
Autore:
CAMPBELL JA; GOODWIN AA; MERCER FW; REDDY V;
Indirizzi:
MONASH UNIV CLAYTON VIC 3168 AUSTRALIA RAYCHEM CORP,RES & DEV MENLO PK CA 94025
Titolo Testata:
High performance polymers
fascicolo: 3, volume: 9, anno: 1997,
pagine: 263 - 279
SICI:
0954-0083(1997)9:3<263:SOAMPB>2.0.ZU;2-3
Fonte:
ISI
Lingua:
ENG
Soggetto:
POLY(ETHER IMIDE) BLENDS; ETHER ETHER KETONE); SEGMENTAL RELAXATION; POLYMER BLENDS; CONCENTRATION FLUCTUATIONS; MOLECULAR MOBILITY; DECAY FUNCTION; BINARY BLENDS; TEMPERATURE; BEHAVIOR;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Science Citation Index Expanded
Citazioni:
50
Recensione:
Indirizzi per estratti:
Citazione:
J.A. Campbell et al., "STUDIES ON A MISCIBLE POLYIMIDE BLEND", High performance polymers, 9(3), 1997, pp. 263-279

Abstract

Blends of polyimides XU-218 and PEI were investigated using differential scanning calorimetry, dynamic mechanical analysis, thermogravimetric analysis and adhesive bond testing. The thermal stability of the blends increased as the proportion of PEI increased while the alpha-relaxation of the blends occurred at a slower rate and was broader and more cooperative in some blends, compared with the pure polymers. Physical aging of the pure polymers and blends in the glass state revealed changes in relaxation rate and lost enthalpy that were also consistent with blends not behaving as simple mixtures. The dynamic mechanical andphysical aging behaviour was attributed to an increase in density on blending which decreased the unoccupied volume and increased the constraints on molecular mobility, as well as to the presence of concentration fluctuations. The adhesive properties of the blends were also investigated and bond strength was found to vary with blend composition and test temperature.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 29/09/20 alle ore 05:36:38