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Journal of Dispersion Science and Technology Volume 27, 2006 - Issue 4
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Original Articles

Microcalorimetric Study on Interaction between PEO‐PPO‐PEO Triblock Copolymers and Sodium Dodecyl Trioxyethylenated Sulfonate in Aqueous Solutions

Liu Feng Department of Chemistry, Liaocheng University, Liaocheng, China
,
Sun De‐Zhi Department of Chemistry, Liaocheng University, Liaocheng, ChinaCorrespondence[email protected]
,
Wang Zhong‐ni College of Chemistry and Material Science, Shandong Normal University, Jinan, China
,
Qiu Xiao‐mei Department of Chemistry, Liaocheng University, Liaocheng, China
&
Li Gan‐Zuo Key Laboratory of Colloid and Interface Chemistry, (Shandong University), Ministry of Education, Jinan, China
Pages 555-559 | Received 09 Aug 2005, Accepted 30 Aug 2005, Published online: 06 Feb 2007
 
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Abstract

Interactions between three triblock copolymers of poly (ethylene oxide)‐poly (propylene oxide)‐poly (ethylene oxide), EOmPOnEOm, and the ionic surfactant sodium dodecyl trioxyethylenated sulfonate, C12E3S, in aqueous solutions were investigated with titration microcalorimetry at 293.15 K. Values of enthalpies, entropies, and free energies of interaction have been derived. The thermodynamic data indicate that interactions between EOmPOnEOm and C12E3S decrease with the increase of m/n.

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