Hydrophilic gels have been prepared by polymerization of glycol methacrylate monoesters in the range of very low diester concentrations. The monomer mixture has been diluted with various solvents and the range has been investigated, in which swelling is independent of the dilution of the monomer mixture on polymerization. The quality of the gel is independent of the concentration and character of the solvent used in polymerization in a very broad range.
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Wichterle et al. (1967) studied this question.
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