Dynamic rheological behavior and mechanical properties and of PVC/ASA blends

Abstract

Poly (vinyl chloride) (PVC)/acrylonitrile-styrene-acrylate resin (ASA) blends were proposed in this paper. Plastic and dyanmic rheology behavior of melts were investigated. The influences of composition on storage modulus G′, loss modulus G′′ and complex viscosity η * were discussed. The dynamic mechanical properties, mechanical properties and morphology were determined. The results showed that both the plastic time and balance torque of the blends decreased. The G′, G′′ and η * of PVC/ASA melts all exhibited a monotonic change with increasing frequency and ASA content. The η * of melts was all higher than that of pure PVC. When ASA content in the blend was not over 10 wt.%, both the impact and tensile strength of the blends were increased. The blend had the best impact strength at 10 % content of ASA, which is 4.8 kJ/m2 higher than pure PVC. ASA can be used as an efficient impact aid of PVC at appropriate content, but also can decrease the balance torque and plastic time in the processing.