Abstract

The chemistry of fatty-acid aluminum salts, particularly stearates, was studied in polypropylene, liquid hydrocarbons, and fluorocarbons. Heating results in a series of related events. The distearate carboxylate coordination bonds are altered from crosslinked to intramolecular, and the Al–O–Al bond is weakened or broken. Stearic acid, which is formed as the aluminum distearate decomposes, changes rapidly from the dimer to the less stable monomer form, with a heat of conversion of 4.9 kcal/mole. The conversion of stearic acid dimer to monomer is unaffected by the presence of the aluminum coordination bonds.

Far Ultraviolet Spectrophotometric Studies of Fatty Acids by Photoelectric and Spectrographic Methods*†

D. M. Kerns, R. Belkengren, Harold Clark, and Elmer S. Miller
J. Opt. Soc. Am. 31(3) 271-279 (1941)

Thickness of Monolayers of the Fatty Acids by Multiple Beam Interferometry

R. Shirahata and G. D. Scott
Appl. Opt. 10(9) 2192-2194 (1971)

Second-harmonic generation in mixed hemicyanine: fatty-acid Langmuir–Blodgett monolayers

I. R. Girling, N. A. Cade, P. V. Kolinsky, R. J. Jones, I. R. Peterson, M. M. Ahmad, D. B. Neal, M. C. Petty, G. G. Roberts, and W. J. Feast
J. Opt. Soc. Am. B 4(6) 950-955 (1987)

Structure of the Associated OH Valence Vibration Band in Light and Heavy Acetic, Trichloroacetic, and Trifluoroacetic Acids*

Nelson Fuson and Marie–Louise Josien
J. Opt. Soc. Am. 43(11) 1102-1105 (1953)

Spectrochemical microanalysis of aluminum alloys by laser-induced breakdown spectroscopy: identification of precipitates

Igor V. Cravetchi, Mike Taschuk, Georg W. Rieger, Ying Y. Tsui, and Robert Fedosejevs
Appl. Opt. 42(30) 6138-6147 (2003)