Functional terpolymers containing vinylphosphonic acid: The synthesis and characterization of poly(vinylphosphonic acid-co-styrene-co-maleic anhydride)

Novel functional temperature-sensitive amphiphilic P-containing polymers were synthesized by complex-radical ternary polymerization of vinylphosphonic acid (VPA), styrene (S), and maleic anhydride (MA). Charge transfer complexes (CTCs), complex-formation constants (Kc) between acceptor and donor monomer systems and the complexed monomer reactivity ratios were investigated by 1H-NMR analysis. Contrary to theoretical predictions, the VPA.S complex is more active as compared to MA.S complex in the ternary system since VPA monomer can form the CTC both with S monomer and strong H-bonded complex with MA monomer. The terpolymer compositions, characterizations, and structureproperty relationships of a series of poly(VPA-co-S-co-MA)s were investigated by GPC, FTIR, Raman, 1H-NMR, 13C-NMR, DEPT-135, 31P-NMR, TGA-DSC, DMA, XRD, viscometry, and titration. (C) 2012 Wiley Periodicals, Inc. J Appl Polym Sci, 2012