Impact fracture toughness and morphology of diatomite‐filled polypropylene composites

Abstract

Impact fracture strength is an important characterization for impact toughness of materials. A polypropylene (PP) filled with diatomite with different diameter (5, 7, and 13 lm) was fabricated by means a twinscrew extruder. The impact fracture strength of these composites was measured at room temperature to identify the effects of diatomite content and diameter on impact fracture strength of filled polypropylene composites. The results showed that the influence of diatomite on the notched impact strength was significant. When the volume fraction of the diatomite (/ f ) was less than 10%, the notched impact strength (r I ) increased quickly with an addition of / f , and then the variation of r I was slight. The notched impact strength of the composite with the diatomite diameter of 7 lm is the highest when / f was 10%. Furthermore, the impact fracture surface was observed by using a scanning electronic microscope (SEM) to study the toughening mechanisms.

Effects of the glass bead content and the surface treatment on the mechanical properties of polypropylene composites

“…Recently, the structure/property relationship nanometer CaCO 3 ‐filled PP composites has been paid extensive attention 8. More recently, one of us12 investigated the effects of the particle size and content of diatomite on the impact‐fracture toughness of filled PP composites, and got some interesting findings.…”

Effects of the surface treatment of wollastonite on the tensile and flow properties for reinforced polypropylene composites

“…PP is usually filled with inorganic particles to improve its mechanical properties including stiffness, strength, and toughness, such as calcium carbonate [4,5], glass bead [6][7][8][9], diatomite [10,11], Al(OH) 3 , and Mg(OH) 2 [12]. It was found that there were certain toughening effect [3,9,10] and reinforcing effect [6,8,11] of these inorganic particles in PP resin.…”

Crystallization properties and thermal stability of polypropylene composites filled with wollastonite

“…PP is usually blended with other resin [11] or filled with inorganic particles to improve its mechanical properties, including stiffness, strength and toughness. These inorganic particles include calcium carbonate [12,13], glass beads [14], diatomite [15][16][17], Al(OH) 3 and Mg(OH) 2 [18]. It was found that there were certain toughening effects [14,15] and reinforcing effect [11, 12, 16, …”