An investigation was made of the influence of the filler particle shape on the nature of failure of PP-based composites. It was established that the filler particle shape affects the types of defect formed and the nature of failure of PP-based composites. The introduction of talc or wollastonite particles into PP leads to brittle failure of the composite up to its upper yield point. When spherical particles are used, the material retains plastic properties, and rupture occurs on neck propagation.
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