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Titolo:
HYDROSTATICALLY EXTRUDED GLASS-FIBER-REINFORCED POLYOXYMETHYLENE .2. MODELING THE ELASTIC PROPERTIES
Autore:
HINE PJ; WIRE S; DUCKETT RA; WARD IM;
Indirizzi:
UNIV LEEDS,IRC POLYMER SCI & TECHNOL LEEDS LS2 9JT W YORKSHIRE ENGLAND
Titolo Testata:
Polymer composites
fascicolo: 5, volume: 18, anno: 1997,
pagine: 634 - 641
SICI:
0272-8397(1997)18:5<634:HEGP.M>2.0.ZU;2-A
Fonte:
ISI
Lingua:
ENG
Soggetto:
UNIDIRECTIONAL FIBROUS COMPOSITES; POLYPROPYLENE; ORIENTATION; CONSTANTS;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Science Citation Index Expanded
Science Citation Index Expanded
Citazioni:
21
Recensione:
Indirizzi per estratti:
Citazione:
P.J. Hine et al., "HYDROSTATICALLY EXTRUDED GLASS-FIBER-REINFORCED POLYOXYMETHYLENE .2. MODELING THE ELASTIC PROPERTIES", Polymer composites, 18(5), 1997, pp. 634-641

Abstract

This paper describes an investigation into modeling the elastic properties of hydrostatically extruded short glass fiber reinforced polyoxymethylene (POM). The starting material for the extrusion was randomly arranged short glass fibers (25 wt%, average length 150 mu m) in an isotropic POM matrix. Extrusion was carried out through a reducing conical die at 15 degrees C below the melting point of the matrix phase (hence the composite was extruded in the solid state), such that after extrusion, preferential alignment along the extrusion direction was developed for both the fibers and for the crystalline fraction of the polymer matrix. The elastic properties of samples, made over a range of extrusion ratios, were measured using the ultrasonic immersion method, atechnique that allows a complete set of elastic constants to be determined for a composite. Theoretical predictions for the elastic properties of the oriented extrudates were generated by combining a modification to the theory of Wilczynski to allow for the fibers' being surrounded by an oriented matrix phase, together with the aggregate model of Ward to model the effects of partial orientation of the fiber orientedmatrix units.

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Documento generato il 28/09/20 alle ore 05:08:48