Solution properties of polystyrene in cosolvent systems

At 293 K, intrinsic viscosities [η] have been measured for polystyrene samples of different relative molar mass M in mixtures of two poor solvents. These solvents were ethyl acetate and cyclohexane. Upon mixing these two poor solvents, thermodynamically better solvents could be obtained. The cosolve...

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Bibliographic Details
Published in:Polymer (Guilford) 1986-09, Vol.27 (9), p.1406-1409
Main Authors: Abdel-Azim, Abdel-Azim A., Moustafa, Samy S., Ei Dessouky, Mohamed M., Abdel-Rehim, F., Hassan, Salah A.
Format: Article
Language:English
Subjects:
Applied sciences
cosolvent systems
Exact sciences and technology
Organic polymers
Physicochemistry of polymers
polystyrene
Properties and characterization
Solution and gel properties
solution properties
viscosity
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Summary:At 293 K, intrinsic viscosities [η] have been measured for polystyrene samples of different relative molar mass M in mixtures of two poor solvents. These solvents were ethyl acetate and cyclohexane. Upon mixing these two poor solvents, thermodynamically better solvents could be obtained. The cosolvency was detected from the viscosity measurements. Several graphical procedures have been utilized for deriving the unperturbed dimensions of polystyrene expressed as K θ (in the relation [η]=K θM 1 2 α 1 3 , where α is the expansion factor). It was found that the unperturbed polymer dimensions were not constant and differed from those measured in the single θ-solvent ( trans-decalin) in which K θ was found to be 81 × 10 −3 dm 3 kg −1.
ISSN:0032-3861
1873-2291
DOI:10.1016/0032-3861(86)90042-X