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  • 1 Department of Physical Chemistry, University of Lodz, Pomorska 165, 90-236, Lodz, Poland
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Abstract

The critical micelle concentrations of gemini surfactants having different spacer chain lengths 8-7-8 and 8-8-8 in aqueous solutions have been determined by calorimetric and densimetric methods within a wide temperature range. The isothermal volume change upon micellisation of the title surfactants has been obtained from density measurements using pseudo-phase model. Predicted values for apparent molar volume of the surfactant at the critical micellisation concentration (c.m.c.) agree very well with infinite dilution volumes calculated from additivity method. It has been shown that the inflection point in the curves of the dependence of volume expansion coefficient on molality can be used to determine the value of c.m.c. similar as the second one of the two maxima which are observed on the concentration function of apparent molar heat capacity. The experimental determined values of c.m.c. have been compared with the values presented in the literature data for 8-s-8 gemini surfactants.

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  • Scimago Journal Rank (2019): 0.415
  • SJR Hirsch-Index (2019): 87
  • SJR Quartile Score (2019): Q3 Condensed Matter Physics
  • SJR Quartile Score (2019): Q3 Physical and Theoretical Chemistry
  • Impact Factor (2018): 2.471
  • Scimago Journal Rank (2018): 0.634
  • SJR Hirsch-Index (2018): 78
  • SJR Quartile Score (2018): Q2 Condensed Matter Physics
  • SJR Quartile Score (2018): Q2 Physical and Theoretical Chemistry

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Journal of Thermal Analysis and Calorimetry
Language English
Size A4
Year of
Foundation
1969
Volumes
per Year
4
Issues
per Year
24
Founder Akadémiai Kiadó
Founder's
Address
H-1117 Budapest, Hungary 1516 Budapest, PO Box 245.
Publisher Akadémiai Kiadó
Springer Nature Switzerland AG
Publisher's
Address
H-1117 Budapest, Hungary 1516 Budapest, PO Box 245.
CH-6330 Cham, Switzerland Gewerbestrasse 11.
Responsible
Publisher
Chief Executive Officer, Akadémiai Kiadó
ISSN 1388-6150 (Print)
ISSN 1588-2926 (Online)

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