The adhesion between a thermoplastic matrix (especially propylene) with cellulosic natural fibre components is studied comprehensively in the past. There exist no investigations according to the connection between in corporation of adhesive mediator, composite technology and the effects. In this contribution, Thueringisches Institut fuer Textil- und Kunststoff-Forschung e.V. (Rudolstadt-Schwarza, Federal Republic of Germany) investigates the relation between the different production processes of natural-fibre compounds and the action of adhesive mediators. Different commercially available products of maleic anhydride modified polypropylene are used. The technologies with long-fibre reinforced mats present the following picture: (a) Generally there exists a low increase in bending values; (b) There exist no fundamental dependencies, such as the dependency between the viscosity of the adhesive mediator and is effect or content of maleic anhydride; (c) no clear correlation between the fibre-matrix connection and parameters of the adhesive mediator. The use of long-fibre reinforced thermoplastic granule enables the production of natural-fibre compounds by injection molding or extrusion. In this case, there exist following relations: (a) higher increase of strength in comparison to a module; (b) the increase of tensile and bending parameters is higher than the parameters of natural-fibre components in mat processes; (c) the impact strength is not improved by adhesive mediators. Furthermore, the influence of maleic anhydride modified polyprolyne on the properties of natural-fibre compounds is studied. Long-fibre granules open new constructive possibilities. Simultaneously the long-fibre granule technology offers alternatives with respect to the incorporation of adhesive mediators into compounds.Available from TIB Hannover: F04B2494 / FIZ - Fachinformationszzentrum Karlsruhe / TIB - Technische InformationsbibliothekSIGLEDEGerman
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