Mechanical and morphological studies of poly(propylene)-filled eggshell composites
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Poly(propylene) (PP) composites were prepared by using eggshell (ES) as filler and their mechanical properties were compared with those using talc (TA) and calcium carbonate (CC) of different grain sizes (X-50). A decrease in impact strength and deformation at break with increase in filler content was observed. The PP composite with ES (X-50 = 8.4 mu m) was stiffer than those with CC (X-50 = 0.7 mu m). The hybrid composite PP-ES-TA showed a similar stiffness as the PP-TA composites due to the similar morphology of TA (X-50 = 0.5 mu m) and ES, when TA was replaced up to 75 wt.-% by ES. SEM study revealed evidence of improved interfacial bonding between PP and ES in theirs composites.