و استحكام پارگي مطلوب آن PVC/NBR-SBR آميخته

PVC/NBR-SBR Blend and Its Desirable Tear Strength

PVC is one of the most important and widely used plastics in polymer industries. Blending is an effective method to improve the undesirable properties of PVC such as stiffness and brittleness. One of the most important blends of PVC is its mechanical mixing with nitrile rubber, but it should be reminded that despite of expensiveness, it has not desirable tear strength. In this work, SBR was added to the blend of PVC/NBR with the purpose to achieve better tear strength with lower cost The effect of adding SBR and also mixing factors on mechanical properties of ternary blend were investigated using experimental design, i.e. Taguchi method. With the aid of replacing 7% by weight of NBR by SBR in PVC/NBR-SBR ternary blend the tear strength increased twice to the initial value.