PVC filled with vacuum pyrolysis scrap tires‐derived carbon blacks: An investigation on rheological, mechanical, and electrical properties

Abstract

AbstractPyrolysis of scrap tires produces oil and carbon black (CB). The purpose of this work is to compare pyrolytic CBs with commercial grades as fillers for poly(vinyl chloride) (PVC). Blending of PVC with CB was performed in the melt at 180°C. The compositions prepared were 1,5,10,20, and 30 wt % of CB. The dynamic rheological, mechanical, and electrical properties of the PVC–CB composites were investigated. The results obtained for the storage modulus and complex viscosity of the composites of PVC with the pyrolytic CBs were between those of a high‐grade (Monarch 1100) and a low‐grade (Sterling R) commercial CBs. Intermediate tensile modulus, elongation at break, and electrical conductivity were also obtained. The specific surface area of the CB was shown to influence the composite properties. Reduction of the volatile matter and ash contents of the pyrolytic CB led to better properties of the PVC composites. © 1992 John Wiley & Sons, Inc.