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Titolo:
INFLUENCE OF REACTION INJECTION-MOLDING (RIM) PROCESSING VARIABLES ONTHE MECHANICAL-PROPERTIES OF A COMMERCIAL LINEAR SEGMENTED POLYAMIDE
Autore:
LONG SD; DAWOOD I; COATES PD; JOHNSON AF;
Indirizzi:
UNIV BRADFORD,IRC POLYMER SCI & TECHNOL BRADFORD BD7 1DP W YORKSHIRE ENGLAND
Titolo Testata:
Plastics, rubber and composites processing and applications
fascicolo: 3, volume: 23, anno: 1995,
pagine: 161 - 174
SICI:
0959-8111(1995)23:3<161:IORI(P>2.0.ZU;2-I
Fonte:
ISI
Lingua:
ENG
Soggetto:
RRIM;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Science Citation Index Expanded
Science Citation Index Expanded
Citazioni:
20
Recensione:
Indirizzi per estratti:
Citazione:
S.D. Long et al., "INFLUENCE OF REACTION INJECTION-MOLDING (RIM) PROCESSING VARIABLES ONTHE MECHANICAL-PROPERTIES OF A COMMERCIAL LINEAR SEGMENTED POLYAMIDE", Plastics, rubber and composites processing and applications, 23(3), 1995, pp. 161-174

Abstract

The influence of reactant injection time and mould resistance time onthe properties of a commercial polyamide reaction;injection moulding (RIM) formulation has been investigated, using a centre-gated disk mould. The machine performance during injection and the stoichiometry of each injection has been analysed. A range of tests has been carried out on the mouldings including mechanical, instrumented falling weight impact and differential scanning calorimetry. The mouldings are found to contain voids, resulting from gaseous entrainment at the reactant flow front during mould filling and the absorption of nitrogen gas by the reactants, which are found to have a critical effect on the mechanical properties, particularly the extension at the maximum tensile stress. In the case of void-free material, small changes in injection time can lead to significant changes in mechanical properties, whereas changes in mould residence time are less significant.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 29/11/20 alle ore 02:45:10