EFFECT OF PROCESSING AND COMPOSITION ON THE PROPERTIES OF PVC/ELASTOMER/NANO-CaCO₃ COMPOSITE

In this paper,the effect of the processing and composition on the mechanical properties of the PVC/elastomer/nano-CaCO₃ ternary-phase composites was investigated in detail.Customarily, CPE or ACR as impact modifier and nano-CaCO₃ was directly added to PVC. However, in this study, the master batch prepared by dispersing the nano-CaCO₃ in CPE, as a novel modifier, was processed with PVC. Improved dispersion of nano-filler in the matrix (observed by SEM ) and good cooperation effect of nano-CaCO₃ and CPE on the toughness were obtained during the processing, as the results showed. Improvement of mechanical properties of the blend system was preferred,when the proportion of CPE to nano-CaCO₃ in the master batch is 1∶2.