On the Influence of Maleic Anhydride on the Fiber/Matrix-Adhesion
The objective of the presented study was to investigate the adhesion and bonding quality between steel fibers and a polypropylene (PP) matrix. In order to improve the fiber matrix adhesion, neat PP had been modified with various proportions of maleic anhydride grafted polypropylene (MAHgPP). Fiber pull-out tests had been conducted to determine the apparent interfacial shear strength τ<sup>app</sup>. It could be proven that the grafted PP grades exhibit up to 40 % better τ<sup>app</sup> values than the unmodified PP matrix, while the major mechanical properties of the matrix were kept constant. Furthermore, scanning electron microscope pictures confirmed an excellent bonding quality between steel and PP grafted with 0.1% MAH.
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