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dc.contributor.authorKwaambwa, H.M.
dc.contributor.authorGoodwin, J.W.
dc.contributor.authorHughes, R.W.
dc.contributor.authorReynolds, P.A.
dc.date.accessioned2009-06-10T12:46:21Z
dc.date.available2009-06-10T12:46:21Z
dc.date.issued2007
dc.identifier.citationKwaambwa, H.M. et al (2007) Viscosity, molecular weight and concentration relationships at 298K of low molecular weight cis-polyisoprene in a good solvent, Colloids and Surfaces A: Physicochem. Eng. Aspects, vol. 294, pp. 14–19en_US
dc.identifier.issn0927-7757
dc.identifier.urihttp://hdl.handle.net/10311/328
dc.description.abstractAseries of six well characterised homopolymers of cis-polyisoprene (PIP) ranging from 1180 to 115,000 molecular weight were utilised to explore viscosity and the scaling relationship between viscosity and concentration in dodecane (good solvent). For each polymer molecular weight, the relative viscosity of PIP in dodecane at 298K was measured at several polymer concentrations using capillary viscometry. The linear extrapolation of experimental data based on Huggins, Kramer, Martin and Schulz-Blaschke equations was used to find the intrinsic viscosity at infinite dilution for each polymer molecular weight. The single-point method of evaluation of the intrinsic viscosity was also used for comparison. The Mark-Houwink fit of the data gave power index of 0.72 indicating that dodecane is good solvent for PIP and the latter exists in solution as open flexible coil. Both the radius of gyration and critical chain overlap concentration, c*, were derived from measured intrinsic viscosities. Plot of the relative viscosities versus the scaled concentration c/c*, resulted in single curve with slope value 4.44×10−2 and correlation coefficient r2 = 0.996, indicating good linear fit.en_US
dc.language.isoenen_US
dc.publisherElsevier B.V. www.elsevier.com/locate/colsurfaen_US
dc.subjectCritical chain overlap concentrationen_US
dc.subjectHydrodynamic radiusen_US
dc.subjectIntrinsic viscosityen_US
dc.subjectMark-Houwink equationen_US
dc.subjectRadius of gyrationen_US
dc.subjectRelative viscosityen_US
dc.subjectRoot-mean-square end-to-end distanceen_US
dc.subjectStockmayer-Fixman equationen_US
dc.subjectViscometryen_US
dc.titleViscosity, molecular weight and concentration relationships at 298K of low molecular weight cis-polyisoprene in a good solventen_US
dc.typePublished Articleen_US


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