Effect of structure of copolymers on the extent of selective sorption in dilute solutions in mixed solvents

✍ Scribed by J. Podešva; P. Kratochvíl

• Publisher: Elsevier Science
• Year: 1972
• Tongue: English
• Weight: 248 KB
• Volume: 8
• Category: Article
• ISSN: 0014-3057
• DOI: 10.1016/0014-3057(72)90043-2

✦ Synopsis

Al~-traet--The selective sorption of 2,2,3,3-tetrafluoropropanol (TFP) on to the macromolecules of polystyrene, poly(methyl methacrylate) and mixtures of these homopolymers, and also on to the macromolecules of the corresponding random and alternating copolymers has been measured. Dilute polymer solutions in a binary mixed solvent (benzene with 20 vol.-% TFP) have been studied by equilibrium dialysis and differential refractometry. The selective sorption of TFP in this system increases (at a constant copolymer composition) with increasing number of bonds between nonidentical monomer units; it takes up its highest value for the alternating copolymer and its lowest value for the mixture of the homopolymers.