A NEW TECHNIQUE FOR DETERMINING THE ADSORPTION ENERGY OF TERMINALLY ADSORBED POLYMER

Using a new experimental technique, ''Continuous Elution Method'', the desorption behavior of polystyrene(PS) and polystyrene (PS-X) functio nalized by a terminal iminium ion (-X) from alpha-Al2O3 and gamma-Al2O 3 surface were investigated, and found that PS-X is forming a terminal ly adsorbed polymer layer on alpha-Al2O3 surface. Furthermore, it was found that the adsorption force of terminally adsorbed polymer is bala nced with the desorption force which is contributed from the osmotic p ressure in the adsorption layer. Based on this concept, the adsorption energy of the end-functionalized polystyrene terminally adsorbed on t he alpha-Al2O3, surface was evaluated to be 4.2 similar to 4.3 kT.