Soiling of plasticized poly(vinyl chloride)

Abstract

The effects of three plasticizers and two plasticizer concentrations on the topography and soiling of poly (vinyl chloride) (PVC) were studied. Palmitic acid and triolein were chosen to represent solid and liquid soils. The feasibility of using infrared spectroscopy to quantify the amount of soil on PVC was examined. The structure of the solid model soil on plasticized PVC was studied with optical microscopy and atomic force microscopy. Palmitic acid formed two different structures on the PVC surface. Both the type and concentration of the plasticizer influenced the structure of the oily soil on plasticized PVC. The wetting of plasticized PVC with the liquid oily soil was compared to wetting with water through the measurement of the contact angles. Plasticized PVC was hydrophobic and oleophilic.

Biocompósitos de acetato de celulose e fibras curtas de Curauá

“…O plastificante ideal deve apresentar elevada solubilidade no polímero, além de ser estável a altas e baixas temperaturas, ser resistente a UV e apresentar baixa migração no polímero. Os plastificantes são menos efetivos em polímeros semicristalinos já que os domínios cristalinos segregam o plastificante e atuam como uma rede mantendo a estrutura do polímero 59 .…”