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Titolo:
X-ray absorption, particle orientation, and rheological behavior of talc-calcite mixed-particle compounds in a polystyrene matrix
Autore:
Kim, KJ; White, JL;
Indirizzi:
Univ Akron, Inst Polymer Engn, Akron, OH 44325 USA Univ Akron Akron OH USA 44325 ron, Inst Polymer Engn, Akron, OH 44325 USA
Titolo Testata:
JOURNAL OF POLYMER SCIENCE PART B-POLYMER PHYSICS
fascicolo: 15, volume: 37, anno: 1999,
pagine: 1787 - 1802
SICI:
0887-6266(19990801)37:15<1787:XAPOAR>2.0.ZU;2-W
Fonte:
ISI
Lingua:
ENG
Soggetto:
FILLED POLYMER MELTS; LOW SHEAR STRESSES; CARBON-BLACK; THERMOPLASTICS; FLOW; SUSPENSIONS; VISCOSITY; DISK;
Keywords:
talc-polystyrene compounds; calcite-polystyrene compounds; calcite-talc-polystyrene compounds; X-ray absorption; particle orientation; rheological properties; yield value;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Physical, Chemical & Earth Sciences
Citazioni:
31
Recensione:
Indirizzi per estratti:
Indirizzo: White, JL Univ Akron, Inst Polymer Engn, Akron, OH 44325 USA Univ Akron Akron OH USA 44325 Polymer Engn, Akron, OH 44325 USA
Citazione:
K.J. Kim e J.L. White, "X-ray absorption, particle orientation, and rheological behavior of talc-calcite mixed-particle compounds in a polystyrene matrix", J POL SC PP, 37(15), 1999, pp. 1787-1802

Abstract

This article presents experimental studies of (a) X-ray absorption, (b) particle orientation, and (c) the shear viscosity of ternary talc-calcite-polystyrene compounds. A quantitative investigation of X-ray absorption using a wide-angle X-ray diffraction (WAXD) intensity method for binary mixture (PS/talc, PS/calcite) systems and ternary mixtures (PS/talc/calcite) systemsis reported. The Alexander-Klug equation was used to interpret the data. X-ray diffraction pole figures indicate that talc particles orient in shear flows perpendicular to the direction of shear with their surfaces parallel to die/mold walls. There was a general tendency in mixed particle systems for the talc particles to decrease in orientation with increasing calcite content. The shear viscosity of the compounds was measured and found to increase with increasing particle loading and vary with particle composition. The talc, calcite, and talc/calcite-filled thermoplastic melts at higher loadings were found by creep measurements to exhibit yield values, i.e., stresses below which there is no flow. We found a viscosity-shear stress plateau at low shear stress. The true yield values are much lower than yield valuesmeasured by extrapolation of higher shear stress data. (C) 1999 John Wiley& Sons, Inc.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 04/12/20 alle ore 21:42:50