Abstract
AbstractAcrylonitrile‐butadiene‐styrene (ABS)/poly(methyl meth‐acrylate) (PMMA)/nano‐calcium carbonate (nano‐CaCO3) composites were prepared in a corotating twin screw extruder. Four kinds of nano‐CaCO3 particles with different diameters and surface treatment were used in this study. The properties of the composites were analyzed by tensile tests, Izod impact tests, melt flow index (MFI) tests, and field emission scanning electron microscopy (FESEM). This article is focused on the effect of nano‐CaCO3 particles' size and surface treatment on various properties of ABS/PMMA/nano‐CaCO3 composites. The results show that the MFI of all the composites reaches a maximum value when the content of nano‐CaCO3 is 4 wt%. In comparison with untreated nano‐CaCO3 composites, the MFI of stearic acid treated nano‐CaCO3 composites is higher and more sensitive to temperature. The tensile yield strength decreases slightly with the increase of nano‐CaCO3 content. However, the size and surface treatment of nano‐CaCO3 particles have little influence on the tensile yield strength of composites. In contrast, all of nano‐CaCO3 particles decrease Izod impact strength significantly. Stearic acid treated nano‐CaCO3 composites have superior Izod impact strength to untreated nano‐CaCO3 composites with the same nano‐CaCO3 content. Furthermore, the Izod impact strength of 100 nm nano‐CaCO3 composites is higher than that of 25 nm nano‐CaCO3 composites. POLYM. COMPOS., 31:1593–1602, 2010. © 2009 Society of Plastics Engineers
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