Abstract

PASSADOR, Fábio R.; PESSAN, Luiz A.  and  RODOLFO JR., Antonio. Influence of the partitioning agent on the preparation of PVC/NBR Blends. Polímeros [online]. 2008, vol.18, n.3, pp. 193-200. ISSN 0104-1428.  http://dx.doi.org/10.1590/S0104-14282008000300003.

Nitrile rubbers used in mixture with PVC resin are supplied in powder. This kind of nitrile rubber has a partitioning agent to avoid agglomeration in the particles during the transport and storage. In this study, the influence of the partitioning agent on the preparation of PVC/NBR blends was investigated. The mechanical properties of the blends were evaluated by tensile properties, tear strength and hardness. The PVC/NBR blends with partitioning agent of PVC showed an increase in the tensile stress and Young's modulus compared to the PVC/NBR blends with partitioning agent of CaCO₃. The morphology of the blends examined by scanning electron microscopy demonstrated the influence of the partitioning agent.

Keywords : PVC/NBR blends; poly (vinyl chloride); nitrile rubber; partitioning agent.