Journal of Applied Polymer Science, Vol.75, No.10, 1303-1312, 2000
Plastification of poly(vinyl chloride) by polymer blending
Blends of poly(vinyl chloride) (PVC) with different copolymers have been studied to obtain a plasticized PVC with improved properties and the absence of plasticizer migration. The copolymers used as plasticizers in the blends were acrylonitrile butadiene rubber, ethylene vinyl acetate (EVA), and ethylene-acrylic copolymer (E-Acry). Blends were studied with regard to their processing, miscibility, and mechanical properties, as a function of blend and copolymer composition. The results obtained were compared with those of equivalent compositions in the PVC/dioctyl. phthalate (DOP) system. Better results than PVC/DOP were obtained for PVC/acrylonitrile butadiene rubber blends. The plasticizing effect on PVC of EVA and E-Acry copolymers was similar to that of DOP. it is shown that crosslinking PVC/E-Acry blends or increasing the vinyl acetate content in PVC/EVA blends, are alternatives that can increase the compatibility and mechanical properties of these blends. (C) 2000 John Wiley & Sons, Inc.
Keywords:EPOXIDIZED NATURAL-RUBBER;TWIN SCREW EXTRUDER;POLY(ETHYLENE-CO-VINYL ACETATE);MECHANICAL-PROPERTIES;TERNARY BLENDS;NITRILE RUBBER;CROSS-LINKING;PVC;MISCIBILITY;SYSTEM