| Summary: | 碩士 === 國立聯合大學 === 化學工程學系碩士班 === 102 === This study is based on Polyvinyl phenol (PVPh), Polystyrene (PS) and a Phenoxy resin with Polycarbonate (PC) at different temperatures in different proportions to produce monolayers. Using isotherm experiments to determine the change of surface pressure - area per molecular isotherm and calculate the excess area in order to investigate the relationship between intermolecular forces and property of mixed monolayer.
The analysis of π-A isotherm and excess area showed that the characteristic of PS and PC was similar. Furthermore, we can know the system deviates from the ideal condition. Phenoxy resin and PC at 25 ℃ and 40℃, under low surface pressure and high mixing ratio of PC a miscible system. On the basis of relaxation curve, the increase of temperature will decrease the stability of the monolayers. The results of oscillation were different because of material structure and intermolecular forces. Furthermore, we can know the oscillation and physical meaning by exploring the surface dilatational modulus｜E*｜app of the monolayers.
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