摘要
Flexible Polyurethane （PU） foam is the material most widely used among urethanes. The foams were synthesized via the reaction of soy polyol, mixtures of isocyanates MDI：TDI （80：20）, in the presence of water （blowing agent） with molding process. This experiment was to analyze the physical properties of soy polyol and elaborate the principle of catalyst within the synthesis. The use of liquid and solid catalyst on the polyol synthesis results in significant cellular morphology and properties of polyurethane foam. It is found that the PU which was synthesized using bentonite catalyst has an irregular form of cell morphology, and it has higher density than using sulphuric acid catalyst.
