Chemical modification of the polymeric sorbent containing hydroxyl functional groups

Summary Dimethyldichlorosilane and stearic acid chloride were used for deactivation of hydroxyl functional groups present in the skeleton of the methacrylic ester ofp,p′-dihydroxydiphenylpropane diglycidyl ether-divinylbenzene, porous copolymer used as HPLC packing. The influence of chemical modification on the chromatographic behaviour of the copolymer was studied. To characterize selectivity of the packings, retention indices of five homologous series and test compounds were determined. The data obtained suggest that modification with stearic acid chloride affects both the chemical and porous structure of the copolymer while modification with dimethydichlorosilane changes only the chemical character of the packing.