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Thermodynamics of mixing of ethylene oxide oligomers with different end groups in tetrachloromethane: theoretical treatment
Author(s) -
Killmann Erwin,
Cordt Frank,
Möller Friedrich
Publication year - 1992
Publication title -
macromolecular theory and simulations
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.37
H-Index - 56
eISSN - 1521-3919
pISSN - 1022-1344
DOI - 10.1002/mats.1992.040010404
Subject(s) - ethylene oxide , oligomer , mixing (physics) , thermodynamics , ethylene , chemistry , oxide , polar , poly ethylene , equilibrium constant , polymer chemistry , materials science , organic chemistry , polymer , copolymer , physics , quantum mechanics , astronomy , catalysis
In a previous paper we reported the enthalpies of mixing of oligomers of ethylene oxide with different end groups in tetrachloromethane. This paper shows the applicability of the modified theoretical treatment, based on a quasichemical equilibrium of the contacting segmental surfaces originated from Huggins, to our experimental results. The experimental data of ethylene oxide oligomers with methoxy end groups can be described with the energy parameter Δε αβ , the equilibrium constant K αβ and the surface ratio r σ assuming a chemically uniform surface of the oligomer in CCI 4 . Ethylene oxides with strong polar OH end groups can be treated successfully with an extended version of the theory with two additional parameters K and ΔΔε for systems containing three different kinds of chemical units.