'FT-IR and potentiometric study of basic polymer behaviour in the free form, in different bulks, both in solid state and aqueous solution

The behaviour of the polymer N2LL having a poly(amidoamine) structure [obtained by polyaddition of N,N'-dimethyl-1,4-diaminobutane to 1,4-bis(acryloyl)piperazine], was studied by Fourier transform infrared spectroscopy and potentiometric techniques in the free form, blended, surface grafted and in a network with polyurethane. The different strengths of interaction via hydrogen bond of the N2LL chain were evaluated in the different bulks, which showed that the polymeric chains have similar behaviour when in the linear form and anchored at one end to the surface of the polyurethane support, or when both ends are fastened. The different hydrophilic character of the N2LL polymer and polyurethane chains is responsible for differences in behaviour in the solid state and in aqueous solution.