Fig. 3From: Preparation and investigation of hydrolyzed polyacrylonitrile as a preliminary biomedical hydrogelPictures of polymer. Pictures of poly(AN-co-MAA-co-NIPAM), poly(AN-co-MAA) and poly(AN-co-NIPAM) copolymer solutions with ratios of (a) 50/25/25, (b) 25:50:25, and (c) 25:25:50 (AN:MAA:NIPAM) at pHÂ 3.0, 7.0, and 10.0 and with molecular weights of (d) 2000, (e) 20,000 and f 50,000Back to article page