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dc.contributor.author Kwaambwa, H.M.
dc.contributor.author Goodwin, J.W.
dc.contributor.author Hughes, R.W.
dc.contributor.author Reynolds, P.A.
dc.date.accessioned 2009-06-10T12:46:21Z
dc.date.available 2009-06-10T12:46:21Z
dc.date.issued 2007
dc.identifier.citation Kwaambwa, 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. 14–19 en_US
dc.identifier.issn 0927-7757
dc.identifier.uri http://hdl.handle.net/10311/328
dc.description.abstract Aseries 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.iso en en_US
dc.publisher Elsevier B.V. www.elsevier.com/locate/colsurfa en_US
dc.subject Critical chain overlap concentration en_US
dc.subject Hydrodynamic radius en_US
dc.subject Intrinsic viscosity en_US
dc.subject Mark-Houwink equation en_US
dc.subject Radius of gyration en_US
dc.subject Relative viscosity en_US
dc.subject Root-mean-square end-to-end distance en_US
dc.subject Stockmayer-Fixman equation en_US
dc.subject Viscometry en_US
dc.title Viscosity, molecular weight and concentration relationships at 298K of low molecular weight cis-polyisoprene in a good solvent en_US
dc.type Published Article en_US


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