INFLUENCE OF GENERAL ABSORBED RADIATION DOSE ON THE CONTENT OF THE GEL-FRACTION IN ION-EXCHANGE POLYMER HYDROGELS

Abstract

The effect of the total absorbed radiation dose on the content of the gel fraction of polymer hydrogels, received by radiation co-polymerizing of N-vinylpyrrolidone and methacrylatein in the presence of a di-vinyl cross-linking agent, and ion exchange resins, has been studied. It is shown that at the absorbed dose of 35 kGy the maximum degree of monomers conversion is achieved, which is 85 – 88 % for ion-exchange polymers and 97.5 % for base co-polymer. Quantitative estimation of hydrogels expansionhas been performed and shows that in the absorbed doses in the range from 25 to 40 kGy the parameters of three-dimensional grid do not change.

Keywords

• ion exchange hydrogels
• gel fraction
• ionizing radiation
• absorbed dose
• radiation polymerization