Abstract
Inverse gas chromatography (IGC) at infinite dilution is a powerful technique to characterize the superficial and interfacial properties of solid substrates as oxides, polymers or polymers adsorbed on oxides. It can also be used to determine the physicochemical properties and the transition phenomena of polymers. In this paper, IGC was used to determine the changes, as a function of temperature, of the specific free enthalpy ΔG a SP and deduce the specific entropy ΔS a SP of poly (methyl methacrylate) (PMMA) adsorbed on alumina or on silica for different tacticities of PMMA. The study of the surface properties of PMMA/SiO 2 and PMMA/Al 2O 3, revealed an important difference in the physicochemical behaviour of oxides covered by various concentrations of PMMA. This study also highlighted an important effect of the tacticity of the polymer on the specific entropy of PMMA adsorbed on oxides.
| Original language | English |
|---|---|
| Pages (from-to) | 99-107 |
| Number of pages | 9 |
| Journal | Chromatographia |
| Volume | 73 |
| Issue number | 1-2 |
| DOIs | |
| Publication status | Published - Jan 2011 |
| Externally published | Yes |
Keywords
- Inverse gas chromatography
- Tacticity
- Specific entropy and interactions
- Retention volume
- Adsorption
- CHARACTERIZE PHYSICOCHEMICAL PROPERTIES
- ACID-BASE PROPERTIES
- GLASS-TRANSITION TEMPERATURE
- FREE-ENERGY CHARACTERISTICS
- GAS-SOLID CHROMATOGRAPHY
- INFINITE DILUTION II
- SURFACE-ENERGY
- THERMODYNAMIC CHARACTERIZATION
- 2ND-ORDER TRANSITIONS
- CONDUCTING POLYMERS