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dc.contributor.author Goodwin, J.W.
dc.contributor.author Hughes, R.W.
dc.contributor.author Reynolds, P.A.
dc.contributor.author Kwaambwa, H.M.
dc.date.accessioned 2009-06-09T08:58:26Z
dc.date.available 2009-06-09T08:58:26Z
dc.date.issued 2004
dc.identifier.citation Goodwin 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. 163–170 en_US
dc.identifier.issn 0927-7757
dc.identifier.uri http://hdl.handle.net/10311/324
dc.description.abstract A 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.iso en en_US
dc.publisher Elsevier B.V. www.elsevier.com/locate/colsurfa en_US
dc.subject Non-adsorbing en_US
dc.subject Depletion flocculation en_US
dc.subject Non-aqueous en_US
dc.subject Rheology en_US
dc.subject Viscosity en_US
dc.subject Viscosity ratio en_US
dc.subject Steric–elastic en_US
dc.subject Temperature dependence en_US
dc.title Viscosity behaviour of particles with non-adsorbing polymers Part III—experimental study en_US
dc.type Published Article en_US


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