How to determine a good solvent to dissolve polymers?
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CHARLES M. HANSEN is a research associate in the Advanced Research Group at the PPG Industries, R&D Center in Springdale, Pennsyluania. He holds a B. Ch. E. degree from the University of Louisuille and an MS degree from the University of Wisconsin. His work on solvent diffusion in polymers and on the solubility parameter Zed to a doctorate from the Technical University of Denmarh in 1967. Continued study of the solubility parameter has led to the present discussion
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A solvent is suitable for a polymer if both have similar values of the solubility parameter. Thus, polystyrene that has a solubility parameter of 9.1 cal0.5cm− 1.5 is likely to be soluble in ethyl-acetate (9.1), toluene (8.9), chloroform (9.21), but not in n-hexane (7.24).
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