Abstract del lavoro presentato al "Xth European Symposium on Fluorine Chemistry", Padova, 20-25 settembre 1992 - Long chain hydro-fluorocarbons CF3(CF2)n(CH2)mCH3 (n = 3, 5, 7; m = 7, 11, 13, 15, 17) synthesised by free radical addition of perfluoroalkyl iodides RFI to linear 1-alkenes, showed interesting surface-active properties in a non-aqueous medium [M. Napoli, A. Scipioni and P. Alessi, J. Fluorine Chem., 51 (1991) 103].
Pursuing the research on the physical properties of these compounds, a series of measurements of cloud point (ASTM D 2500-81) and pour point (ASTM D 97-66) was done with solutions of these hydro-fluorocarbons in a paraffin oil and the measured values were then plotted against w/w concentration.
An increase of the cloud point and pour point values of paraffin, depending on the lenght of the perfluoroalkyl group, was generally observed.
