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Titre du document / Document title

Novel modifiers for polyamides and polyolefines

Auteur(s) / Author(s)

HAUSMANN K. (1) ; MCBRIDE E. (2) ;

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

(1) DuPont de Nemours Intl. S.A, SUISSE
(2) E.I. DuPont de Nemours & Co, ETATS-UNIS

Résumé / Abstract

Novel modifiers and modification technologies have been developed for polyamides and polyolefines such as polypropylene and have found new applications in areas so far reserved for halogenated materials like auto interiors Polyamide impact modification with grafted EPM and EPDM rubbers is a well known subject. New ionomer modifiers and grafted ethylene copolymers have been developed providing superior impact strength at low temperatures. Newly developed processes are allowing the production of low density grafted ethylene octene copolymers which are providing superior impact toughness at low temperatures. This paper provides fundamental insight into the selection of the best suited modifier for PA6 and PA66 modification. Whereas for PA66 it is important to have a modifier with a high MAH graft level and low glass transition temperature, graft level is only of minor importance for PA6. Higher graft level and higher toughener loading in PA66 and 6 usually increase viscosity and reduce flow of the final product. Apart from modifying the impact strength of polymers, higher loadings of modifiers can also be used to modify the overall mechanical or forming properties of polymers. This is done in the so called proprietary ETP-TPO technology by DuPont where the properties of TPO (Thermoplastic polyolefin - a PP-EPDM blend) are modified to the extent that viscosity and thermoformability is increased through the addition of high levels of ionomers and epoxy functionalised compounds to lead to compositions,that find applications as films in the auto interior industry. Compared to a conventional PP, these films are characterized by a pleasant warm touch, superior thermoformability good retention of the surface texture during vacuum thermoforming and excellent flexibility even at low temperature.

Source / Source

Congrès
Addcon world '98 : additives for the new millenium :   ( London, 9-10 November 1998 )
International plastics additives and modifiers conference, London , ROYAUME-UNI (09/11/1998)
1998  , pp. 5.1-5.9[Note(s) :  [162 p.]] (16 ref.) ISBN 1-85957-149-2 ;  Illustration : Illustration ;

Langue / Language

Anglais

Editeur / Publisher

Rapra Technology, Shrewsbury, ROYAUME-UNI  (1998) (Monographie)

Mots-clés anglais / English Keywords

Nylon

;

Olefin polymer

;

Heterogeneous mixture

;

Ethylene copolymer

;

Maleate copolymer

;

Graft copolymer

;

Ionomer

;

Property composition relationship

;

Impact strength

;

Dispersion reinforced material

;

Comparative study

;

Thermoplastic rubber

;

Composite material

;

Fiber reinforced material

;

Glass fiber

;

Experimental study

;

Mechanical properties

;

Mots-clés français / French Keywords

Amide polymère

;

Oléfine polymère

;

Mélange hétérogène

;

Ethylène copolymère

;

Maléate copolymère

;

Copolymère greffé

;

Ionomère

;

Relation composition propriété

;

Résistance choc

;

Matériau renforcé dispersion

;

Etude comparative

;

Caoutchouc thermoplastique

;

Matériau composite

;

Matériau renforcé fibre

;

Fibre verre

;

Etude expérimentale

;

Propriété mécanique

;

Mots-clés espagnols / Spanish Keywords

Amida polímero

;

Olefina polímero

;

Mezcla heterogénea

;

Etileno copolímero

;

Maleato copolímero

;

Copolímero injertado

;

Ionómero

;

Relación composición propiedad

;

Resistencia choque

;

Material renforzado dispersión

;

Estudio comparativo

;

Caucho termoplástico

;

Material compuesto

;

Material reforzado fibra

;

Fibra vidrio

;

Estudio experimental

;

Propiedad mecánica

;

Localisation / Location

INIST-CNRS, Cote INIST : Y 32133, 35400007456719.0040

Nº notice refdoc (ud4) : 2000119



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