Use of silane agents and poly(propylene‐g‐maleic anhydride) copolymer as adhesion promoters in glass fiber/polypropylene composites

Abstract

ABSTRACT:Two organofunctional silanes and a copolymer were used to increase the interfacial adhesion in glass fiber polypropylene (PP) reinforced composites. The performance of the coupling agents was investigated by means of mechanical property measurements, scanning electron microscopy (SEM), and dynamic mechanical analysis. The increased adhesion between the glass fibers and PP matrix observed with SEM resulted in an improvement of the mechanical and dynamic mechanical properties of the composites. Coupling achieved with the copolymer poly(propylene-g-maleic anhydride) (PP-g-MA) proved to be the most successful compared with 3-aminopropyltrimethoxysilane and 3-aminopropyltriethoxysilane. The combination of PP-g-MA with the silanes resulted in further property improvements because of the ability of the MA groups to react with the amino groups of the silanes.

Synergistic effect of coupling agents and fiber treatments on mechanical properties and moisture absorption of polypropylene–rice husk composites and their foam

“…Further, the composite made with silane-treated fibers showed improvement in impact strength but not tensile strength, which is not surprising. Bikiaris et al observed similar phenomena in PPglass fiber composites [29]. The glass fibers were treated with 3-aminopropyltriethoxysilane and PP-g-MA was used as the coupling agent, which is exactly the same as in this study.…”

Mechanism of adhesion promotion between aluminium sheet and polypropylene with maleic anhydride‐grafted polypropylene by γ‐aminopropyltriethoxy silane

“…While for pure PP-based composite the modulus decayed clearly. Bikiaris et al [28] investigated the mechanical and dynamic mechanical properties of glass-fibre-reinforced PP composite and the results showed that the combination of PP-g-MAH with the silanes as 3-aminopropyltrimethoxysilane and 3-APS resulted in the most effective property improvements because of the ability of the MAH groups to react with the amino groups of the silanes. Hamada et al [29] investigated the effect of the sizing conditions on bending properties of continuous glass-fibre-reinforced PP composite.…”

Determination of structure-property relationships for 3-aminopropyltriethoxysilane films using x-ray reflectivity

“…3,4 APTES is also used to strengthen the interface between polymer and inorganic phases in composites. 5,6 Although the effect of deposition and curing conditions on the surface morphology of APTES films has been reported, 2,7-11 the methods used do no not probe the internal structure of the films, and accordingly they provide no insight into the origin of improved hardness and wear resistance of APTES films. APTES films deposited from toluene and heptane, for example, are over two orders of magnitude harder than those prepared from polar or hydrated solvent systems.…”