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Characterization and Miscibility Dynamics of Dextran‐Poly(vinylpyrrolidone)‐Water System
Author(s) -
Mete Dilek,
Göksel Cemile,
Güner Ali
Publication year - 2011
Publication title -
macromolecular symposia
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.257
H-Index - 76
eISSN - 1521-3900
pISSN - 1022-1360
DOI - 10.1002/masy.201000058
Subject(s) - miscibility , polyvinylpyrrolidone , differential scanning calorimetry , materials science , polymer chemistry , polymer , viscosity , intrinsic viscosity , polymer blend , aqueous solution , chemical engineering , flory–huggins solution theory , n vinylpyrrolidone , thermodynamics , analytical chemistry (journal) , chemistry , copolymer , organic chemistry , composite material , physics , engineering
Summary: The miscibility behavior and intermolecular interactions among Dextran (Dx) with different molecular weight and Polyvinylpyrrolidone (PVP) blends were studied as dilute aqueous solutions at 25 °C by viscosity method. The intrinsic viscosity and the interaction coefficient were experimentally measured for each polymer‐water as well as for Dx‐PVP‐water systems. These results served for the prediction of miscibility of the Dx/PVP blends with various blend compositions by using $\Delta {\left[ {\eta } \right]}_{m} $ , $\Delta b_{m} $ , $\Delta k_{AB} $ , $\Delta B$ , $\mu $ and $\alpha $ parameters. Except Dx4/PVP with its all compositions (Dx4 with nominal molecular weight of 110 000), other blend systems are found to be almost miscible. The density measurements of these polymer solutions and their blends were conducted in order to compare with the viscosity findings. Lastly, all Dx with different molecular weight, PVP and their blends were characterized by infrared spectroscopy (FT‐IR), and differential scanning calorimetry (DSC).