Tailored hydrolytically stable polyacid gels based on curable poly(acrylic acid)s and bisacrylamides

• Published in: Polymer international Vol. 65; no. 10; pp. 1142 - 1149
• Main Authors: Lampe, Ulrich, Maier, Maximilian, Klee, Joachim E, Ritter, Helmut
• Format: Journal Article
• Language: English
• Published: Chichester, UK John Wiley & Sons, Ltd 01.10.2016; Wiley Subscription Services, Inc
• Subjects: bisacrylamides; copolymerization; Crosslinking; Curing; Diamines; Gels; Hydrogels; Methacrylamide; Networks; poly(acrylic acid); Spacers
• ISSN: 0959-8103; 1097-0126
• DOI: 10.1002/pi.5179

Poly(acrylic acid)s (PAAs) with curable methacrylamide moieties as well as bisacrylamide crosslinkers are described as components for well‐defined hydrogels with increased hydrolytic resistance. PAAs with tethered curing moieties of different alkyl spacer lengths (−(CH2)n−, n = 2, 3, 6 or 8) were prepared via copolymerization of one‐sided methacrylated diamines with protected acrylic acid, followed by polymer‐analogous methacrylation and deprotection. Bisacrylamide crosslinkers were synthesized by acrylation of diamines with different cores and N‐substitutes like allyl, cyclopropyl or propyl groups. Both components were subsequently combined for the formation of novel amide based hydrogels. Network densities of the obtained gels were elucidated by rheokinetic investigations. © 2016 Society of Chemical Industry Hydrolytically stable hydrogels were obtained by crosslinking of novel poly(acrylic acid) copolymers, modified with curable moieties and different side‐chain spacer lengths and bisacrylamide crosslinkers. Network strength was determined by rheokinetic investigations.