Some fluoro-hydrocarbons having the typical structure RF-RH can be prepared by addition of perfluoroalkyl iodides (RFI) to olefins (CH2CHR′H) by the method suggested by N.O. Brace [1] : RFI + CH2ChRH → RFCH2CHI-R′H → RFCH2CH2R′H Starting from the linear perfluoroalkyl iodides C6F13I and C8F17I, and prepared: C6F13C17, C6F13C12H25, C6F13C16H33, C8F17C12H25 and C8F17C16H33. These compounds were tested in a liquid as surface agents; measurements of the surface tension were carried out at various concentrations and temperatures (20 °C, 30 °C and 50 °C). Some of the compounds tested i.e., C6F13C16H33) also at the highest temperature shown a poor solubility in the parraffin used. A remarkable drop of the surface tension values was shown by C8F17H33 at 20 °C. Experimental data and surface tension vs concentration diagrams are reported.
Synthesis of some fluoro-hydrocarbons and their performance as surface agents in a non-aqueous medium
CONTE, LINO;
1989
Abstract
Some fluoro-hydrocarbons having the typical structure RF-RH can be prepared by addition of perfluoroalkyl iodides (RFI) to olefins (CH2CHR′H) by the method suggested by N.O. Brace [1] : RFI + CH2ChRH → RFCH2CHI-R′H → RFCH2CH2R′H Starting from the linear perfluoroalkyl iodides C6F13I and C8F17I, and prepared: C6F13C17, C6F13C12H25, C6F13C16H33, C8F17C12H25 and C8F17C16H33. These compounds were tested in a liquid as surface agents; measurements of the surface tension were carried out at various concentrations and temperatures (20 °C, 30 °C and 50 °C). Some of the compounds tested i.e., C6F13C16H33) also at the highest temperature shown a poor solubility in the parraffin used. A remarkable drop of the surface tension values was shown by C8F17H33 at 20 °C. Experimental data and surface tension vs concentration diagrams are reported.Pubblicazioni consigliate
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