Effects of Dynamic Vulcanization and Acrylic Acid on Properties of Recycled Poly(vinyl chloride)/Acrylonitrile Butadiene Rubber (PVCr/NBR) Blends

摘要

Effects of dynamic vulcanization and acrylic acid (AAc) on pro-cessability,mechanical properties,swelling behavior,morphology,and thermal stability of recycled poly(vinyl chloride)/acrylonitrile butadiene rubber (PVCr/NBR) blends were investigated.Blends were prepared in a Haake Rheomix at a temperature of 150 deg C and a rotor speed of 50 rpm.Recycled poly(vinyl chloride)/acryloni-trile butadiene rubber (PVCr/NBR) blends were also prepared as comparison.It was found that the dynamic vulcanization and the addition of acrylic acid improved the stabilization torque,mechanical energy,stress at peak,stress at 100 elongation (M_(100)),swelling resistance,and thermal stability but decreased the elongation at break of the blends.The introduction of a cross-link into the elastomer phase and better compatibility between PVCr and NBR are responsible for the enhancement of thermal stability and mechanical properties of dynamically vulcanized PVCr/NBR+AAc as evidence from the scanning electron microscopy (SEM) of the tensile fracture surfaces and infrared spectroscopy study of the dynamically vulcanized of PVCr/NBR+AAc shows.