Abstract— The effects of micro and nanoscale calcium carbonate (CaCO3) particles on the mechanical properties of polyvinyl chloride (PVC) were investigated. Type of (PVC S5070) were used as the matrix in this study, hydrocarb 95T CaCO3 as a micro size particles, and SOCAL 312 CaCO3 as a nano size particles with different phr (0 wt%, 10 wt% and 20 wt%). The nano-CaCO3 particles were observed by FT-IR spectras. Nano- CaCO3 increased the tensile strength and affected the tensile strength of PVC more than micro-CaCO3 particles. The raise in hardness shore (A) is more considerable in nano-CaCO3 filled PVC compared to that of micro-CaCO3. TSDC test investigated that nano-CaCO3 in PVC samples have greater electrical resistance, and the maximum volume resistivity in micro-CaCO3 in PVC samples which mixed by ultrasonic. Thermal characterization of PVC samples were tested by DMA. Storage modulus and loss factor (tan δ) examined and showed that the storage modulus of PVC decreased as a function of temperature. The storage modulus can be increased concurrently by the presence of CaCO3. The glass transition of nano-CaCO3 sample mixed by ultrasonic has higher glass transition than other samples which mixed by normal mixing.
Keywords— Calcium carbonate, Polymer composites, PVC, Micro-CaCO3, Nano-CaCo3.
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