Study on Batch Foaming Processes of Poly Styrene and Poly Methyl Methacrylate

In this study at the first, the foaming process states and related theoretical background were explained. Then the literature survey according to foaming of poly styrene and poly methyl methacrylate with different blowing agents was conducted. Using scanning electron microscopy is one of the common methods for investigating of foams morphology. But this method did not give any exact information about foaming process states. Therefore a new tool is necessary to gain information about nucleation, growth and coalescence of cells. In this work a new visual technology was introduced for investigating of batch foaming dynamics and also related studies considering various operation parameters were investigated. In the following it was concluded that some parameters like temperature, pressure and foaming time had important effects on the foaming process and the produced foam quality.