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Titolo:
THE EFFECT OF TALC ON CELL NUCLEATION IN EXTRUSION FOAM PROCESSING OFPOLYPROPYLENE WITH CO2 AND ISOPENTANE
Autore:
PARK CB; CHEUNG LK; SONG SW;
Indirizzi:
UNIV TORONTO,DEPT MECH & IND ENGN,100 COLL ST TORONTO ON M5S 3G8 CANADA
Titolo Testata:
Cellular polymers
fascicolo: 4, volume: 17, anno: 1998,
pagine: 221 - 251
SICI:
0262-4893(1998)17:4<221:TEOTOC>2.0.ZU;2-4
Fonte:
ISI
Lingua:
ENG
Soggetto:
MICROCELLULAR THERMOPLASTIC FOAM; STYRENE-ACRYLONITRILE COPOLYMER; GLASS-TRANSITION PARTICLES; HETEROGENEOUS NUCLEATION; TENSILE TOUGHNESS; SHEET FORMATION; POLYMERS; POLYCARBONATE; POLYSTYRENE; MICROVOIDS;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Science Citation Index Expanded
Science Citation Index Expanded
Citazioni:
32
Recensione:
Indirizzi per estratti:
Citazione:
C.B. Park et al., "THE EFFECT OF TALC ON CELL NUCLEATION IN EXTRUSION FOAM PROCESSING OFPOLYPROPYLENE WITH CO2 AND ISOPENTANE", Cellular polymers, 17(4), 1998, pp. 221-251

Abstract

The effect of talc on cell nucleation of polypropylene (PP) foam was investigated. Branched high-melt-strength PP was used to reduce bubblecoalescence during extrusion foam processing. When isopentane was used as a blowing agent, bubble nucleation was dominated by the talc concentration, and the isopentane content did not affect the cell density very much. By contrast, when CO2 was used as a blowing agent, both talc and CO2 concentrations determined the cell-population density. However, the effect of talc on nucleation was significant only when the CO2content was low. In addition, the maximum achievable cell density wasnot improved by talc when CO2 was used whereas the maximum cell density was dramatically improved by talc when isopentane was used. The experimental results indicate that the heterogeneous bubble nucleation mechanisms in plastic foam processing with CO2 are fundamentally different from those in the processing with a long-chain blowing agent such as isopentane.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 23/09/20 alle ore 16:07:06