Preparation and characterization of nano/micro‐calcium carbonate particles/polypropylene composites

Abstract

A new kind of polypropylene (PP)/CaCO 3 composites was prepared on a twin screw extruder with the nanoparticle content of 5 wt % and the 2500 mesh microparticle content of 15 wt %. The mechanical property of four different samples [pure PP (1), PP filled with 15 wt % microCaCO 3 particle composites (2), PP filled with 5 wt % nanoCaCO 3 particle composites (3) and PP filled with micro/nano-CaCO 3 complex size particle composites (4)] was investigated through tensile tests, notched Izod impact tests and SEM. The results indicated that the sample 4 had the best mechanical property. The proofs of SEM showed that the high impact energy could lead to debonding and creating microcavitation between the nanoparticle and polymer interface if the polymer was filled with the nanoparticles. This process could absorb a lot of mechanical failure energy, but too much mechanical failure energy would lead to the enlargement of microcavitation and the destruction of the composites in sample 3. In sample 4, the microparticle could be used to prevent the enlargement of microcavitation in the matrix polymer under the higher impact failure energy. In this article, the model of the impacting failure process of micro/nanoCaCO 3 /PP composites was established.

A strategy of precipitated calcium carbonate (CaCO3) fillers for enhancing the mechanical properties of polypropylene polymers

“…A statistical analysis and a 2 2 factorial experimental design were employed to evaluate the effects of the rheological performance of polypropylene/calcium carbonate composites (Fig. 12) [46]. From this analysis, we observed that the addition of lower content of filler with lower particle size leads to decreased composite viscosity due to better dispersion of the filler in the polymer matrix.…”

Bivalve Shell: Not an Abundant Useless Waste but a Functional and Versatile Biomaterial

“…Currey et al [110] reported that the fracture strength in bending varied between 56 and 116 MPa. Jackson et al [111] investigated the nacre from Pinctada shell and reported a Young's modulus of approximately 70 composite, as compared with the normal use of inorganic fillers such as calcium carbonate and talc [112][113][114][115]. Li et al [116][117][118][119][120] …”

Filling and coloring effect of pearl shell powder and dye‐loaded pearl shell powder on polypropylene

“…Recently, it was reported that PP could be reinforced and toughened at the same time by the addition of surface‐modified CaCO 3 nanoparticles. Zhang et al . prepared sodium stearate‐treated nano‐CaCO 3 with average particle size of 36 nm and introduced it into PP at 5 wt % filler content.…”