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Titre du document / Document title

The influence of adhesion promoters on the properties of injection moulded long-glass-fibre polypropylene

Auteur(s) / Author(s)

PELTONEN P. ; PÄÄKKÖNEN E. J. ; JÄRVELÄ P. K. ; TÖRMÄLÄ P. ;

Affiliation(s) du ou des auteurs / Author(s) Affiliation(s)

Tampere univ. technology, inst. plastics technology, 33101 Tampere, FINLANDE

Résumé / Abstract

Different grades of coupling agents were added to the polypropylene homopolymer matrix during melt impregnation of continuous glass fibres. All of the ingredients used in the experiments were commercial products, and the amounts of coupling agents added to the polypropylene were based on the recommendation of the manufacturer. The addition of coupling agents on the polypropylene matrix did not decrease the degree of impregnation of manufactured prepreg. Melt impregnated PPJGF prepreg was pelletized to the length of 10 mm, injection moulded and tested. In addition, two commercial long fibre materials and one commercial short fibre compound were injection moulded and tested. All of the components included a glass fibre weight fraction of 40%. The addition to some coupling agents improved tensile and flexural properties remarkably compared to a non-coupled composite. As a typical result, impact strength values of the same specimens were decreased. Low temperature impact strength of long fibre composites were higher compared to impact strengths obtained at room temperature. All long fibre composites showed superior impact properties compared to short fibre composites. The melting histories of the matrices were not affected by the addition of different grades of coupling agents, but the cooling run of the DSC analysis could cause differences in the crystallisation of the coupled matrices. Residual fibre lengths were analysed from the mouldings. The morphology of the interface of the composites, studied with scanning electron microscopy indicated a good relation with mechanical testing

Revue / Journal Title

Plastics rubber and composites processing and applications    ISSN  0959-8111 

Source / Source

1995, vol. 23, no2, pp. 111-126 (39 ref.)

Langue / Language

Anglais

Editeur / Publisher

Institute of Materials, London, ROYAUME-UNI  (1991-1998) (Revue)

Mots-clés anglais / English Keywords

Composite material

;

Preparation

;

Propylene polymer

;

Glass fiber

;

Injection molding

;

Adhesion

;

Coupling agent

;

Property processing relationship

;

Mots-clés français / French Keywords

Matériau composite

;

Préparation

;

Propène polymère

;

Fibre verre

;

Moulage injection

;

Adhérence

;

Agent accrochage

;

Relation mise en œuvre propriété

;

Mots-clés espagnols / Spanish Keywords

Material compuesto

;

Preparación

;

Propeno polímero

;

Fibra vidrio

;

Moldeo por inyección

;

Adherencia

;

Agente enganche

;

Relación puesta en marcha propiedad

;

Localisation / Location

INIST-CNRS, Cote INIST : 17540 N, 35400005970315.0070

Nº notice refdoc (ud4) : 3415020



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