Journal of Metals, Materials and Minerals

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Generally, poly(vinyl chloride) (PVC) without the addition of plasticizer or impact modifiers is rigid and brittle. The aim of this research was to improve the mechanical properties of PVC using styrene-methyl methacrylate/styrene-butadiene compound (SMMA/SBR rubber) as an impact modifier. The compound was obtained commercially. PVC containing SMMA/SBR rubber having SMMA/SBR phrs of 2.5, 5, 7.5 and 10 were prepared using two-roll mill set the conditions as follows: 170 oC and 5 min. Then, compression molding was carried out to prepare testing samples. FTIR analysis of SMMA/SBR rubber containing PVC samples showed the absorption band at 1732 cm-1 (C=O stretching), 3025 cm-1 (=C-H stretching) and 636.8 cm-1 (C-Cl band). The effects of SMMA/SBR rubber on mechanical properties, including impact strength and tensile properties were evaluated by standard tests. The impact strength of SMMA/SBR rubber containing PVC increased significantly with an increase in the SMMA/SBR content (ex. SMMA/SBR 5 phr and 10 phr produced 3.30 and 6.38 kJ/m2 respectively), resulting from the action of SMMA/SBR rubber phase as impact modifier as revealed by SEM images. Furthermore, modulus, tensile strength and elongation at break were investigated.

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