ADSORPTION OF OLIGOOXYPROPYLENATED AMINES AT THE AQUEOUS-SOLUTION AIRINTERFACE - HOMOLOGOUS SERIES OF PIPERIDINE AND MORPHOLINE DERIVATIVES

Authors
SOKOLOWSKI A CHLEBICKI J WILK KA
Citation
A. Sokolowski et al., ADSORPTION OF OLIGOOXYPROPYLENATED AMINES AT THE AQUEOUS-SOLUTION AIRINTERFACE - HOMOLOGOUS SERIES OF PIPERIDINE AND MORPHOLINE DERIVATIVES, Colloids and surfaces. A, Physicochemical and engineering aspects, 80(2-3), 1993, pp. 243-249
Citations number
23
Categorie Soggetti
Chemistry Physical
Journal title
Colloids and surfaces. A, Physicochemical and engineering aspects → ACNP
ISSN journal
09277757
Volume
80
Issue
2-3
Year of publication
1993
Pages
243 - 249
Database
ISI
SICI code
0927-7757(1993)80:2-3<243:AOOAAT>2.0.ZU;2-D
Abstract
The surface tension isotherms for pure oligooxypropylenated piperidine and morpholine at the aqueous solution-air interface were determined and interpreted. The surface excess concentration, GAMMA, the surface area per molecule, A, and the standard free energy of adsorption, DELT AG-degrees, were calculated according to a new empirical adsorption eq uation. The standard free energy contribution for the oxypropylene gro up (PO) in morpholine derivatives, DELTAG-degrees(PO) = -3.34 kJ mol-1 , is substantially lower than that for the PO group located in the pip eridine derivatives, i.e. DELTAG-degrees(PO) = -3.12 kJ mol-1.