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Title: Phase behaviour and rheology of solutions of associative polymer and surfactant
Keywords: associative polymer; surfactant; phase behavior; rheology; interaction; shear thickening
Issue Date: 9-Jun-2008
Citation: ZHAO GUANGQIANG (2008-06-09). Phase behaviour and rheology of solutions of associative polymer and surfactant. ScholarBank@NUS Repository.
Abstract: To elucidate the interactions between associative polymers and surfactants, phase behavior and rheological properties of their aqueous mixtures were studied. With increasing temperature, the viscosity of an HMHEC-surfactant mixture in aqueous solution first decreases, then rises considerably until around the cloud point. The observed viscosity increase can be explained by interchain association due to micellar aggregation. The cloud point temperature (CPT) and phase behavior of mixtures of HMHEC with nonionic surfactant were also studied. Composition analyses were carried out to provide support for associative phase separation for the case of HMHEC, in contrast to segregative phase separation for HEC. An interesting three-phase separation phenomenon was reported in some HMHEC/Triton X-100 mixtures and was studied in detail. The shear thickening behavior of HMHEC aqueous solutions was also experimentally examined. Through measuring the conductivity of probe ions, the microscopic viscosity of HMHEC solutions was investigated and compared with the bulk viscosity.
Appears in Collections:Ph.D Theses (Open)

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