Water Uptake, Thin-Film Characterization, and Gravimetric pH-Sensing of Poly(vinylphosphonate)-Based Hydrogels.

ABSTRACT: Herein, novel, superabsorbent, and pH-responsive hydrogels obtained by the photochemical cross-linking of hydrophilic poly(vinylphosphonates) are introduced. First, statistical copolymers of diethyl vinylphosphonate (DEVP) and diallyl vinylphosphonate (DAlVP) are synthesized via rare earth metal-mediated group-transfer polymerization (REM-GTP) yielding similar molecular weights (M_n,NMR = 127-142 kg/mol) and narrow polydispersities (Đ < 1.12). Subsequently, polymer analogous transformations of P(DEVP-stat-DAlVP) introduced vinylphosphonic acid (VPA) units into the polymers. In this context, the partial dealkylation of the polymers revealed a preference for DAlVP hydrolysis, which was observed via ¹H NMR spectroscopy and explained mechanistically. F

SUBMITTER: Maier AS 

PROVIDER: S-EPMC11783365 | biostudies-literature | 2025 Jan

REPOSITORIES: biostudies-literature