Preferential solvation of poly(methyl methacrylate) and a bisphenol A diglycidyl ether by size-exclusion chromatography.
The preferential adsorption coefficient, lambda, of poly(methyl methacrylate), PMMA, in solutions formed by an epoxy resin in tetrahydrofuran (THF), was studied by size-exclusion chromatography (SEC). Only PMMA of lowest molar mass was preferentially solvated by epoxy but at low concentrations of epoxy in the mixture. At higher epoxy content PMMA was preferentially solvated by THF. A simultaneous and competitive solvation between the specific interactions PMMA-epoxy and the self association of epoxy at high concentrations would be the responsible of this inversion point. The more compacted coil of PMMA of higher molecular weights in solution could explain the lack of interaction of these polymers with epoxy. The results also indicated that lambda decreased with the molar mass. This variation has been attributed to the influence of the coil segment density on preferential adsorption.
Porcar
Iolanda
I
Departament de Química Física, Institut de Ciència dels Materials, Universitat de València, C/Dr. Moliner 50, Burjassot 46100, València, Spain.
Solar
Lorena
L
Abad
Concepción
C
Gómez
Clara M
CM
Campos
Agustín
A
D000465:Algorithms; D001559:Benzhydryl Compounds; D002138:Calibration; D055598:Chemical Phenomena; D002627:Chemistry, Physical; D002850:Chromatography, Gel; D004852:Epoxy Compounds / Q000737:chemistry*; D005663:Furans / Q000737:chemistry; D008970:Molecular Weight; D019904:Polymethyl Methacrylate / Q000737:chemistry*; D012995:Solubility; D000098826:Bisphenol A Compounds
D001559:Benzhydryl Compounds; D004852:Epoxy Compounds; D005663:Furans; D019904:Polymethyl Methacrylate; C018674:tetrahydrofuran; C019273:bisphenol A diglycidyl ether; D000098826:Bisphenol A Compounds