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Viscosities of some long‐chain fatty acids and their relationship with chainlength
Author(s) -
Liew K. Y.,
Seng C. E.,
Lau E. K.
Publication year - 1991
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/bf02663818
Subject(s) - molality , extrapolation , chemistry , thermodynamics , carbon chain , carbon fibers , carbon number , organic chemistry , physics , materials science , mathematics , mathematical analysis , alkyl , aqueous solution , composite number , composite material
The densities and viscosities of octanoic, decanoic, dodecanoic and tetradecanoic acids were determined at temperatures ranging from 20 to 80°C. When the fluidities were plotted against the molal volumes of the acids, curves were obtained. The intrinsic volumes were determined by extrapolation to zero fluidity and compared with previously reported values. Based upon Hildebrand’s equation for non‐ associated liquids, semiempirical equations relating the fluidity with the carbon number were obtained. The equations predict the fluidities of fatty acids with carbon number ranging from 4 to 18 at 4 temperatures from 20°C to 75°C with reasonable agreement with the experimental values.