Odd-even Effects of Counter Cation's Carbon Chain Length for Krafft and Melting Points of n-Alkylammonium and [alpha],[omega]-Alkanediammonium 1-Alkanesulfonates

The Krafft and melting points of n-alkylammonium and α,ω-alkanediammonium 1-alkanesulfonates were measured by the change of transmittance and the dependence of conductivity on temperature under the coexistance of its solid, respectively. Melting points for these surfactans showed the odd-even change...

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Published inNippon Kagakukai shi (1972) Vol. 2001; no. 7; p. 393
Main Authors AKISADA, Hideo, SHIMO, Harumi, FUKUOKA, Kazuaki, ABE, Souichi, AKANO, Shino, NISHIDA, Junko
Format Journal Article
LanguageEnglish
Published Tokyo Japan Science and Technology Agency 01.07.2001
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Summary:The Krafft and melting points of n-alkylammonium and α,ω-alkanediammonium 1-alkanesulfonates were measured by the change of transmittance and the dependence of conductivity on temperature under the coexistance of its solid, respectively. Melting points for these surfactans showed the odd-even changes by the change of carbon chain lengths in their counter cations. The Krafft points for the α,ω-alkanediammonium salts also showed the odd-even changes. The Krafft points for the n-alkylammonium salts did not show clearly the odd-even changes when the carbon number of the counter cation was less than 4 but showed the changes when the carbon number was more than 4. The odd-even changes for their heats of dissolution were obtained by an analogy from the dependence of the conductivities of their saturated solution on temperature. Their odd-even changes were similar to those of Krafft points.
ISSN:0369-4577