EFFECT OF THE INTERNAL STRUCTURE OF MACROPOROUS POLYMERS ON THEIR CHROMATOGRAPHIC PROPERTIES

The effect of internal structure on the chromatographic properties of macroporous copolymers was studied using four types of macroporous copolymers of methyl methacrylate, 2-hydroxyethyl methacrylate and acrylonitrile crosslinke with ethylenedimethacrylate as an example. Different copolymerization parameters cause changes in the internal structure of macroporous copolymers (specific surface area, specific pore volume, submicroscopic particle size and pore distribution). It was shown that the copolymers used in the investigation contained ink bottle" shaped pores and micropores. The main role in the retention of hydrocarbons is played by the specific surface area of the sorbents. The high content of "ink bottle" shaped pores and the asymmetry of the peaks of sorbents with a large specific surface area are probably due to the effects of porous structure on retention. The retentions of hydrocarbons and alcohols on individual sorbents correspond to differential enthalpies of sorption of the methylene group (ΔH·CH and to polarities defined by the Kováts retention indices. © 1979."