Balancing the Strength-Impact Relationship and Other Key Properties in Polypropylene Copolymer-Natural CaSO₄ (Anhydrite)-Filled Composites.

ABSTRACT: To develop novel mineral-filled composites and assess their enhanced properties (stiffness, a good balance between mechanical strength and impact resistance, greater temperature stability), a high-impact polypropylene copolymer (PPc) matrix containing an elastomeric discrete phase was melt mixed with natural CaSO₄ β-anhydrite II (AII) produced from gypsum rocks. First, in a prior investigation, the PPc composites filled with AII (without any modification) displayed enhanced stiffness, which is correlated with the relative content of the filler. The tensile and impact strengths dramatically decreased, especially at high filling (40 wt.%). Therefore, two key methods were considered to tune up their properties: (a) the ionomeric modification of PPc composites by reactive extrusion

SUBMITTER: Murariu M 

PROVIDER: S-EPMC10454880 | biostudies-literature | 2023 Aug

REPOSITORIES: biostudies-literature