Study on Quantitative Predictors for Dispersion and Interfacial Interaction in Composites

In a polymer composite, the surface chemistry of the filler is a critical factor in determining the properties of the composite because it affects the dispersion of the filler and the interfacial adhesion between the filler and Polymer matrix. In this study, we primarily focus on how Nano silica surface chemistry affects the dispersion of silica and interfacial adhesion in Poly (methyl methacrylate) composites and on the resultant properties of the composites. Contact angles of solid samples were measured and the Fowkes Equations method was applied for evaluating surface tensions of the solids. Various contact angle parameters such as total solid surface free energy, work of adhesion, interfacial free energy were analyzed. the thermodynamic work of adhesion between PMMA and each type of silica filler was calculated. It was found that the thermodynamic work of adhesion between PMMA and untreated Nano silica particles was more than in compare with case of treated Nano silica.

کلیدواژه ها:

Contact angle ، Nano silica ، Poly (methyl methacrylate)