Determination des Transitions Vitreuses et Locales de PMMA/Al2O3 Par des Methodes Thermiques et Chromatographiques

Differential thermal analysis (DTA) technique was used to determine the glass transition temperatures of polymethyl methacrylate (PMMA). When PMMA was adsorbed on α-alumina, DTA could not use to obtain the glass transition temperatures of the system PMMA/α-Al₂O₃. Inverse gas chromatography at infinite dilution proved to be an excellent technique to highlight glass transitions and local transitions of PMMA adsorbed on α-Al₂O₃, at various covered surface fractions.