Reactive polymers : XLI. Effect of the content and distribution on polar groups on the polarity of glycidylmethacrylate polymeric sorbents

Abstract

Photeelectron spectroscopy has revealed that the distribution of polar groups (carboxylic and epoxy groups) in macroporous copolymers based on glycidylmethacrylate (GMA)—ethylene dimethacrylate (EDMA) is not uniform, but that their concentration increases starting from the surface towards the centre of the globules. Heat treatment of these copolymers gives rise of conformational changes, which in turn cause an increase in the concentration of polar groups on the surface of the globules, and thus also a rise in polarity. Differences between the modified Rohrschneider constants on the copolymers GMA—EDMA and methyl methacrylate (MMA)—EDMA were used in order to evaluate the participation of epoxy groups in the overall polarity of glycidylmethacrylate polymeric sorbents.