A novel water‐soluble cyclic macromonomer based on a cyclic potassium polyacrylate was prepared. The radical polymerization of acrylamide in the presence of the cyclic macromonomer was carried out to obtain a mechanically crosslinked polyacrylamide. The terpolymerization of acrylamide, sodium acrylate, and the cyclic macromonomer gave a mechanically crosslinked polyelectrolyte with high swellability. The mechanically crosslinked polyelectrolyte exhibited large volume shrinkage in a water solution of Cu(II) salt.
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Kubo et al. (2005) studied this question.
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