Poly[3-(methacryloylamino)propyl]trimethylammonium chloride hydrogel. Synthesis and water-absorption capacity.

The radical polymerization of [3-(methacryloylamino)propyl]trimethylammoniu m chloride by using ammonium persulfate as initiator and N,N-methylene-bis- acrylamide as crosslinker reagent was carried out. The polymers were comple tely insoluble in water and characterized by TT IR spectroscopy and thermal analysis. The effect of the crosslinker reagent on the water sorption capa city was investigated. The highest water-absorption (46.6 g of water/g of x erogel) was observed with the lowest mol% of crosslinker reagent (2 mol%).