Structure and sorption properties of the polyion complex between poly(acrylic acid) and poly(4‐vinylpyridine)

Abstract

A polyion complex was formed from poly(acrylic acid) (PAA) and poly(4‐vinylpyridine) (PVP). Its structure and composition were examined by means of infrared spectroscopy (IR), x‐ray photoelectron spectroscopy (XPS), and elemental analysis. The polyion complex was obtained by dissolving PAA and PVP together in methanol. The composition of the polyion complex was independent of stirring speed, mixing sequence, and standing time after mixing. However, the composition depended on the concentrations and the ratio of the components in the reaction mixture. Excess of PAA in the product was observed when concentrated solutions (2.0 × 10−1M) were used for the preparation or when an excess of PAA was added to PVP. The sorption of water vapor by an equimolar PAA/PVP complex at 293 and 303 K was higher than that by the pure components, especially in the low‐ and middle‐pressure regions. In the high‐pressure region, however, the uptake was not affected by the complex formation. While hydrogen bond interactions in general decrease sorption, Coulombic interactions between polymer chains increased the sorption capacity.

Synthesis and swelling characteristics of poly(4‐vinylpyridine) gels crosslinked by irradiation

“…is 0.49 for the P4VP-ethanol system 13 and V 1 is 58.3 g cm Ϫ3 for ethanol. The M c values, thus determined from eq.…”

Spectroscopic studies of interactions in complexes of poly(1-vinylimidazole) with poly(styrenesulfonic acid) or the zinc salt of poly(styrenesulfonate)

“…While polystyrene is immiscible with poly(ethylene oxide) or poly(propylene oxide), polystyrene ionomers containing 5 -10 mol-% lithium methacrylate show considerable miscibility with the two polar polymers 6) . Poly(4-vinylpyridine) (P4VPy), a proton-accepting polymer, is miscible with a large number of proton-donating polymers such as poly(p-vinylphenol) (PVPh) 7,8) , poly(acrylic acid) (PAA) 9) , poly(methacrylic acid) (PMAA) 9,10) , poly(monoalkyl itaconate)s [11][12][13][14][15] and poly[2-acrylamido-2-methylpropanesulfonic acid] 16,17) . Blends of P4VPy or pyridine-containing polymers and ionomers have also been studied [18][19][20][21][22][23] .…”

Flower like micellar assemblies in poly(styrene)-block-poly(4-vinyl pyridine)/poly(acrylic acid) complexes

“…The hydrogen bonding between PAA and P4VP (or P2VP) was also reported by several authors [20,21]. It can be suggested that in PAA/PS-b-P4VP complexes, hydrogen bonding interaction also exists between pyridine groups and acrylic acid groups.…”