caa a22 4500 445801522 CHVBK 20180317145142.0 cr unu---uuuuu 170323e20110401xx s 000 0 eng 10.1007/s10337-011-1925-6 doi (NATIONALLICENCE)springer-10.1007/s10337-011-1925-6 Hamieh Tayssir Laboratory of Materials, Catalysis, Environment and Analytical Methods (MCEMA-CHAMSI), Faculty of Agricultural Engineering and Veterinary Medicine (Lebanese University), Faculty of Sciences, Lebanese University, Hariri Campus, Hadath, Beirut, Lebanon aut Determination of Lewis Acid Base Properties of Poly(α- n -alkyl) Methacrylates Adsorbed on Silica by Inverse GC [Elektronische Daten] [Tayssir Hamieh] In this paper, the acid base properties in the Lewis terms of poly(α-n-alkyl) methacrylates and when they are adsorbed on silica, were determined. The acid base constants K A and K D of various polymers were calculated by testing the classical model and proposed a new model giving K A and K D and a third constant K reflecting the amphoteric character of our solid substrates and obtaining more precise and quantified results. When the length of alkyl group in side chain of poly(α-n-alkyl) methacrylates changes, the surface properties of such polymers also change and consequently affect all superficial characteristics and especially the acid base constants and the transition phenomena. It was also proved that the specific enthalpy was directly correlated to the acid base constants, the carbon atom number in the side chain of poly(α-n-alkyl) methacrylates and the acceptor AN and donor DN numbers of electrons of polar organic molecules, by the following relationship: ΔH sp=ΔH sp(AN, DN, K D, K A, n SC). Springer-Verlag, 2011 Inverse gas chromatography nationallicence Adsorption nationallicence Recovery fraction nationallicence Specific enthalpy nationallicence Lewis acid and base constants nationallicence Chromatographia Vieweg Verlag 73/7-8(2011-04-01), 709-719 0009-5893 73:7-8<709 2011 73 10337 https://doi.org/10.1007/s10337-011-1925-6 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/s10337-011-1925-6 text/html Onlinezugriff via DOI NATIONALLICENCE 100 1- Hamieh Tayssir Laboratory of Materials, Catalysis, Environment and Analytical Methods (MCEMA-CHAMSI), Faculty of Agricultural Engineering and Veterinary Medicine (Lebanese University), Faculty of Sciences, Lebanese University, Hariri Campus, Hadath, Beirut, Lebanon aut NATIONALLICENCE 773 0- Chromatographia Vieweg Verlag 73/7-8(2011-04-01), 709-719 0009-5893 73:7-8<709 2011 73 10337 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer