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Viscosity Measurements of Dilute Poly(2-ethyl-2-oxazoline) Aqueous Solutions Near Theta Temperature Analyzed within the Joint Rouse-Zimm Model. INT J POLYM SCI 2015. [DOI: 10.1155/2015/690136] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022] Open
Abstract
The steady-state shear viscosity of low-concentrated Poly(2-ethyl-2-oxazoline) (PEOX) aqueous solutions is measured near the presumed theta temperature using the falling ball viscometry technique. The experimental data are analyzed within the model that joins the Rouse and Zimm bead-spring theories of the polymer dynamics at the theta condition, which means that the polymer coils are considered to be partially permeable to the solvent. The polymer characteristics thus depend on the draining parameterhthat is related to the strength of the hydrodynamic interaction between the polymer segments. The Huggins coefficient was found to be 0.418 at the temperature 20°C, as predicted by the theory. This value corresponds toh= 2.92, contrary to the usual assumption of the infiniteh. This result indicates that the theta temperature for the PEOX water solutions is 20°C rather than 25°C in the previous studies. The experimental intrinsic viscosity is well described coming from the Arrhenius equation for the shear viscosity.
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Gmachowski L. Thermal blob size as determined by the intrinsic viscosity. POLYMER 2009. [DOI: 10.1016/j.polymer.2009.01.065] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
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Guillaneuf Y, Castignolles P. Using apparent molecular weight from SEC in controlled/living polymerization and kinetics of polymerization. ACTA ACUST UNITED AC 2008. [DOI: 10.1002/pola.22433] [Citation(s) in RCA: 60] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
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Li X, Zhang Z, Zhang J, Zhang Y, Liu K. A new Solid-State pH Sensor Based on a Platinum Nanoparticle Surface Coated with Poly(quinoxaline), and its Application. Mikrochim Acta 2006. [DOI: 10.1007/s00604-006-0565-2] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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Zhang Y, Li X, Zhang Z, Sun X, Liu K. A New Solid‐State pH Sensor and Its Application in the Determination of Amino on Surface Modified Nanomaterials. ANAL LETT 2005. [DOI: 10.1081/al-200060929] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
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Morris G, Foster T, Harding S. A hydrodynamic study of the depolymerisation of a high methoxy pectin at elevated temperatures. Carbohydr Polym 2002. [DOI: 10.1016/s0144-8617(01)00270-3] [Citation(s) in RCA: 33] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
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