engleski

Composites of Poly(Acrylate) Copolymer Filled with Diathomic Earth: Morphology and Mechanical Behavior

Morphological investigation provides important informations leading to a better understanding of surface phenomena in composites. In the present paper, the failure mechanisms of filled poly(acrylate) (PA) copolymer system has been studied morphologically. Scanning electron microscopy (SEM) is widely applied to asses the the extent of interfacial adhesion in filled polymer composites, generally through examination of fracture surfaces. The high “inner” porosity, as a consequence of origin skeletal structure of natural diatoms, is expected to have influence on the ability of polymer matrix to penetrate into the filler particles forming strong interactions with diatom fillers in composites. Stretched composite film samples showns the mechanism of failure depending on the matrix chemical structure, as well as interactions with filler at the interface. The semilocal place of failure depends on the lowest local product of the composite module and breaking energy, EG. Mechanism of failure in poly(acrylate) copolymer composite film filled with natural silica diatom filler mostly happened in the matrix. It seemed that the interface was not the weak place, or stress concetration point in composite. The increased EG product at the interface directed the stress load transmission, from the interface to the matrix. The present study was concentrated on a morphological interpretation of the mechanical performance of filled poly(acrylate) composites.

Poly(Acrylate) Composites; Diatomic Earth; Failure Mechanism; Filler; Morphology

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