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On the electric resistance of solid soap
Author(s) -
Ezaki Heihachi,
Ohwada K.,
Noguchi S.
Publication year - 1959
Publication title -
journal of the american oil chemists' society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.512
H-Index - 117
eISSN - 1558-9331
pISSN - 0003-021X
DOI - 10.1007/bf02640071
Subject(s) - water content , electrical resistivity and conductivity , logarithm , electrical resistance and conductance , materials science , maxima and minima , thermodynamics , composite material , mathematics , physics , mathematical analysis , geotechnical engineering , geology , quantum mechanics
Summary Electrical resistance values are reported for soaps of various moisture contents. Marked changes in resistance were found at 40–50°C. Below this temperature the logarithm of conductivity is a linear function of inverse temperature, and the slope of the curve is practically independent of water content. Above 40° resistance is markedly affected by the water content of the soap. For soaps containing 12–30% water, heating and cooling curves show definite maxima and minima in electrical resistance values. This effect is less obvious in soaps containing more than 30% water. The phase transition points estimated from resistance measurements are in good agreement with those deduced from other physical measurements.