Abstract
Poly(acrylamide-sodium acrylate) hydrogels were synthesized by 60Co-γ ray radiation polymerization in aqueous solutions. The micromorphology of hydrogel samples dehydrated in the different alcohol media such as methanol, ethyl alcohol, n-propyl alcohol, iso-propyl alcohol, and tert-butyl alcohol was observed by scanning electron microscope (SEM). The critical concentrations at volume phase transition of the hydrogels in the different alcohol medium-water solutions were obtained. The results indicate that the hydrogel samples dehydrated in methanol and in ethyl alcohol display bubble-film network structures, and those in n-propyl alcohol and in iso-propyl alcohol and in tert-butyl alcohol demonstrate the porous structures including the dense phase. The reason is discussed from the critical concentrations and solubility parameters of different alcohol media.
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Shan, J., Liu, Z. & Chen, J. Influence of Different Media on Micromorphology of Radiation Synthesized Poly(acrylamide-sodium acrylate) Hydrogels. Polym J 30, 585–588 (1998). https://doi.org/10.1295/polymj.30.585
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DOI: https://doi.org/10.1295/polymj.30.585