Production of Nanocellular Foams by Controlling Saturation Temperature

Controlling cell morphologies of polymeric foams is an important part of controlling foam properties. In this study, the effects of particle size on cell nucleation in nanosilica-polystyrene (PS) nanocomposites are investigated. A theoretical hypothesis on the effect of nanoparticles size on cell nucleation in PS matrix foam was examined. The microcellular porous materials of neat and composite PS were prepared by batch foaming technique (pressure quench) using supercritical nitrogen as a blowing agent. It was found that the size of the pores decreases and the cell density increases with the decrease in nanosilica size. Decrease of saturation temperature to 70°C leads to formation of nanocellular foams

کلیدواژه ها:

Batch Foaming ، Nanocellular foam ، heterogeneous Nucleation ، Nanosilica ، Polystyrene