Complexation and rate of polymerization of acrylic acid and methacrylic acid in the presence of poly(4‐vinylpyridine) in dilute methanol solution

Abstract

SynopsisA 1:l hydrogen-bonded complex was formed between acrylic acid (AA) or methacrylic acid (MA) and the pyridine group of poly(4-vinylpyridine) (P4VP) in dilute solutions. A shift of infrared absorption of the hydrogen-bonded acid 0-H to a lower energy direction and an upfield shift of acid proton in the NMR were observed when the monomers were added with pyridine. The equilibrium constants of the 1:l complexation with P4VP measured by using a semipermeable membrane were 0.58 and 0.26 for AA and MA, respectively, at 25'C in methanol. The bromometrically measured initial rate of radical polymerization showed only a slight enhancement in the presence of P4VP, the rate being maximum at the 4VP unitmonomer mole ratio of 0.25 and 0.5 for AA and MA, respectively, in dilute methanol solution at 60°C. EXPERIMENTAL MaterialsReagent-grade chemicals were used. AA (Tokyo Kasei), MA (Fluka), and 4-vinylpyridine (4VP) (Fluka) were fractionally distilled before use. 2,2'-Azobisisobutyronitrile (AIBN) (British Drug House) was recrystallized from

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] .…”

Interactions between multifunctional 2-(2-pyridyl)ethylamino-fullerene and proton-donating polymers

“…Pyridine-containing polymers such as poly(2-vinylpyridine) (P2VPy) and poly(4-vinylpyridine) (P4VPy) are miscible with a large number of proton-donating polymers through hydrogenbonding or ionic interactions. P2VPy and P4VPy form complexes with poly(p-vinylphenol) 8) , poly(acrylic acid) (PAA) 9,10) , poly(methacrylic acid) (PMAA) 9,10) , poly(vinylphosphonic acid) (PVPA) 11 , poly(styrenesulfonic acid) (PSSA) 12) and poly(monoalkyl itaconate)s [13][14][15] . Fullerene-containing polymers have received much attention in recent years 16) .…”

Blends containing amphiphilic polymers IV. Poly(N‐1‐alkyl itaconamic acids) with poly(2‐vinylpyridine) and poly(4‐vinylphenol)

“…Dipole-dipole, donor-acceptor or acid-base interactions could take place. Basic polymers such as Poly(vinilpyridine)s are miscible with proton-donating polymers such as Poly(4-vinylphenol) (P4VPh), 1,2 Poly(acrylic acid) (PAA), 3,4 and Poly-(monoalkyl itaconates) (PMAI) 5 due to hydrogen bonding formation. Poly(4-vinilpyridine) (P4VPy) is miscible with several polymers containing acidic groups.…”

“…Poly(4-vinilpyridine) (P4VPy) is miscible with several polymers containing acidic groups. [1][2][3][4][5][6][7][8] Hydrogen bond formation has been considered as critical to enhancing the miscibility in these systems.…”