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dc.contributor.authorGoodwin, J.W.
dc.contributor.authorHughes, R.W.
dc.contributor.authorReynolds, P.A.
dc.contributor.authorKwaambwa, H.M.
dc.date.accessioned2009-06-09T08:58:26Z
dc.date.available2009-06-09T08:58:26Z
dc.date.issued2004
dc.identifier.citationGoodwin J.W. et al (2004) Viscosity behaviour of particles with non-adsorbing polymers Part III—experimental study, Colloids and Surfaces A: Physicochem. Eng. Aspects, vol. 233, pp. 163–170en_US
dc.identifier.issn0927-7757
dc.identifier.urihttp://hdl.handle.net/10311/324
dc.description.abstractA series of well characterised cis-poly(isoprene) (PIP) polymers (Mw = 1180, 8000, 28 300, 31 500, 86 000, 115 000 and 130 000) have been added to dispersions of poly(12-hydroxystearic acid) (PHS) coated poly(methylmethacrylate) (PMMA) particles in dodecane. The ratio of particle size to adsorbed layer was also varied. For a given added polymer molecular weight, the polymer concentration in the continuous phase covered the dilute, semi-dilute and concentrated regimes as defined by the critical concentrations c and c . The viscosity behaviour of latex dispersions with added polymer were similar for all latex/polymer combinations except when polymer Mw = 1180 was added. In the latter case, the effect of adding polymer reduced both the viscosity and shear thinning behaviour. This supports the contention that the lower molecular weight polymer acts more like a diluent than a depletent. The behaviour of the viscosity ratio (the viscosity of the dispersion relative to that of the medium) as a function of polymer concentration increased with an increase in the polymer concentration until some critical concentration (cmax) for all polymers except for a polymer molecular weight 1180 Daltons. The addition of the polymer Mw = 8000 gave the highest viscosity ratio values in the polymer concentration range studied. It was found that the viscosity of all latex/polymer combinations decreased with an increase in temperature. The results suggest that the viscosity behaviour cannot be explained on the basis of a simple steric–elastic model and require a modified theoretical treatment.en_US
dc.language.isoenen_US
dc.publisherElsevier B.V. www.elsevier.com/locate/colsurfaen_US
dc.subjectNon-adsorbingen_US
dc.subjectDepletion flocculationen_US
dc.subjectNon-aqueousen_US
dc.subjectRheologyen_US
dc.subjectViscosityen_US
dc.subjectViscosity ratioen_US
dc.subjectSteric–elasticen_US
dc.subjectTemperature dependenceen_US
dc.titleViscosity behaviour of particles with non-adsorbing polymers Part III—experimental studyen_US
dc.typePublished Articleen_US


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