Abstract
The apparent molar heat capacities of two short-chain surfactants (C6TAB and C8TAB) aq. solns. were detd. at four temps. For the hexyltrimethylammonium bromide no structural transition was obsd. For the octyltrimethylammonium bromide a max. of the apparent molar heat capacity was obsd., which corresponds to the monomer to micelle transition. The two-point scaling theory, that describes the ...
Abstract
The apparent molar heat capacities of two short-chain surfactants (C6TAB and C8TAB) aq. solns. were detd. at four temps. For the hexyltrimethylammonium bromide no structural transition was obsd. For the octyltrimethylammonium bromide a max. of the apparent molar heat capacity was obsd., which corresponds to the monomer to micelle transition. The two-point scaling theory, that describes the thermodn. of the system, which can appear in two phases in the vicinity of crit. point, was applied to analyze this system. The crit. molalities and crit. indexes were obtained. Comparison of these values with those previously reported for other similar systems allowed to relate them with structure changes in the soln. [on SciFinder(R)]
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