Polymeric surfactants for enhanced oil recovery. Part V: Prediction models for the effect of temperature and length of polyoxyethylene chain or hlb on surface and thermodynamic properties of some ethoxylated polymeric nonionics | Zendy

Gendy T. S. | Zendy; Barakat Y. | Zendy; Mohamad A. I. | Zendy; Youssef A. M. | Zendy

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Polymeric surfactants for enhanced oil recovery. Part V: Prediction models for the effect of temperature and length of polyoxyethylene chain or hlb on surface and thermodynamic properties of some ethoxylated polymeric nonionics

Author(s) -

Gendy T. S.,

Barakat Y.,

Mohamad A. I.,

Youssef A. M.

Publication year - 1991

Publication title -

polymer international

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 0.592

H-Index - 105

eISSN - 1097-0126

pISSN - 0959-8103

DOI - 10.1002/pi.4990240406

Subject(s) - surface tension , ethylene oxide , pulmonary surfactant , critical micelle concentration , alkylphenol , thermodynamics , gibbs isotherm , nonylphenol , micelle , materials science , thermodynamics of micellization , chemistry , chemical engineering , organic chemistry , copolymer , alkyl , aqueous solution , polymer , physics , environmental chemistry , engineering

Several equation models were investigated to find the relationship between temperature ( T ). number of ethylene oxide (EO) units ( n ) or the hydrophile‐lipophile balance (HLB) and the surface and thermodynamic properties of some ethoxylated alkylphenol‐formaldehyde polymeric nonionic surfactants. These properties include critical micelle concentration (CMC), free energy of micellization (Δ G mic ), surface tension at CMC (7 CMC ), effectiveness (γ CMC ) and efficiency (p C 20 ) of surfactant to reduce the surface tension of water. The values of the ratio CMC/ C 2(π = 20) were also considered. The linear multiple regression technique was employed to determine the parameters of the equations and to choose the best forms with the highest values of R 2 and F ‐ratio which reflect the goodness and the reliability of the fit.

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