title: Effect of the alkyl chains and of the headgroups on the thermal behavior of ascorbic acid surfactants mixtures.
abstract: The role of the alkyl chain length and of the headgroup on the thermal behavior of mixtures of ASC8 (ascorbyl octanoate) and ASC16 (ascorbyl hexadecanoate) was investigated through differential scanning calorimetry, small- and wide-angle X-ray scattering, and Fourier transform infrared spectroscopy experiments. The formation of two eutectics and of a peritectic point was found from the phase diagram, and their structural properties were studied. The results were compared by investigating the thermal behavior of mixtures of octanoic acid and hexadecanoic acid. The findings provide insights into the role of the ascorbyl headgroups on the intermolecular interactions that determine the phase behavior of the two ascorbic acid based surfactants in the solid state.
authors.affiliation: Department of Chemistry "Ugo Schiff" and CSGI, University of Florence , 50019 Sesto Fiorentino, Firenze, Italy.
authors.forename: Chiara
authors.initials: C
authors.lastname: Venturini
authors.forename: Cristina
authors.initials: C
authors.lastname: Pomposi
authors.forename: Moira
authors.initials: M
authors.lastname: Ambrosi
authors.forename: Emiliano
authors.initials: E
authors.lastname: Carretti
authors.forename: Emiliano
authors.initials: E
authors.lastname: Fratini
authors.forename: Pierandrea
authors.initials: P
authors.lastname: Lo Nostro
authors.forename: Piero
authors.initials: P
authors.lastname: Baglioni