Thermodynamic study of poly(ethylene glycol) in water/acetone solutions by viscometry
-
Abbas Mehrdad
,
Mohammad Taghi Taghizadeh
Abstract
In this work, the intrinsic viscosities of poly(ethylene glycol) (PEG) with a molar mass of 20,000 g·mol-1 were measured in water/acetone solutions from (283.1 to 313.1) K. The expansion factors of the polymer chains were calculated from the intrinsic viscosity data. The thermodynamic parameters (entropy of dilution parameter, the heat of dilution parameter, θ temperature, polymer-solvent interaction parameter and second osmotic virial coefficient) were derived by the temperature dependence of the polymer chain expansion factor. The thermodynamic parameters indicate that mixtures of water/acetone are changed to the poorer solvents for PEG, by increasing temperature and volume fractions of acetone. Also, the temperature dependency of segment-segment and segment-solvent interactions for PEG in mixed water/acetone, is decreased by increasing volume fractions of acetone.
©2011 by Walter de Gruyter Berlin Boston
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Artikel in diesem Heft
- Original Articles
- Selecting process parameter in injection molding via simulation optimization
- A multicriteria simulation optimization method for injection molding
- Approach to develop a screw configuration for compounding solid fillers on a twin screw extruder using the example of polyethylene-layered silicate masterbatches
- WIT: how to visualise, analyse, and control hollow space formationa
- Effect of the glass fiber length on the mechanical properties of long glass fiber reinforced polyphenylene sulfide
- Thermodynamic study of poly(ethylene glycol) in water/acetone solutions by viscometry
- Polymerization of N-methyl B-methyl amino borazine
- Graft copolymerization of granular starch maleate with acrylamide for enhancing grafting efficiency
- Nylon 6,12 fibers under low-dose gamma irradiation
