The preparation of poly(itaconic acid)

Abstract

Poly(itaconic acid) (3) was prepared by polymerizing itaconic anhydride in xylem at 60°C with 2,2'-azodiisobutyronitrile (AIBN) and hydrolyzing the resulted poly(itaconic anhydride) with water. 3 was identified by the elemental analysis, IR and 'H-NMR spectra, and converting it to poly(dimethy1 itaconate). ZUSAMMENFASSUNG:Poly(itacons2ure) (3) wurde durch Polymerisation von Itaconsiureanhydrid in Xylol bei 60°C mit 2,2'-Azodiisobutyronitril (AIBN) und die Hydrolyse des gebildeten Poly(ita-cons5ureanhydrid)s mit Wasser hergestellt. 3 wurde mit Hilfe der Elementaranalyse. der IR und 'H-NMR Spektren sowie seiner Umsetzung zu Poly(dimethy1itaconat) identifiziert.

Study of poly(itaconic acid) in aqueous solutions

“…below 60 o C under pressure of 1 hPa one can obtain PIA showing the structure as given above. An additional, very convincing argument for this structure is the founding [8] that methyl diester can be obtained by treating the product of itaconic acid polymerization with diazomethane. On the other hand, it has been found [2,3,5,6] that both conductometric and potentiometric titrations of PIA provide a result suggesting that the product contains only 50-60 % of carboxylic groups resulting from the unit structure.…”

Synthesis of hydrogels by polymerization of itaconic acid–choline chloride deep eutectic solvent

“…It should be noted that the carbonyl stretching vibration bands appearing for the polymers shift to higher wave number region with comparison to the frequencies observed for the monomer [Figure (c)] because of disappearance of conjugation C=C‐C=O caused by polymerization. Moreover, infrared spectra of P‐DES and P‐WATER show small signals at 1850 cm −1 , 980 cm −1 , and 900 cm −1 that could be assigned to cyclic acid anhydride absorption, indicating some dehydratation of the polymers during drying . Additionally, bands at 1650 cm −1 (C=O stretching) and 1550 cm −1 (N‐H bending) confirm presence of BAA moieties in the polymers …”

“…The obtained results differ from the calculated for hypothetic anhydrous polymer structure (Table , entry 3). However, taking into account hydratation of the polymers–approximately by one water molecule per one IA unit typical for poly(itaconic acid) the copolymer composition was recalculated (Table , entry 4). Finally, molecular formulas of the copolymers were corrected by changing of cross‐linker and hydrated water amounts (Table , entry 5 and 6) to fit most accurately to the experimental data (Table , entry 1 and 2).…”

“…Moreover, infrared spectra of P-DES and P-WATER show small signals at 1850 cm 21 , 980 cm 21 , and 900 cm 21 that could be assigned to cyclic acid anhydride absorption, indicating some dehydratation of the polymers during drying. 29 Additionally, bands at 1650 cm 21 (C5O stretching) and 1550 cm 21 (N-H bending) confirm presence of BAA moieties in the polymers. 34 The results of elemental and IR analysis indicate formation of poly(itaconic acid-co-bisacrylamide) and also point out that the polymers have rather similar chemical structures and elemental compositions.…”

Interpenetrating hydrogel networks based on polyacrylamide and poly(itaconic acid): synthesis and characterization

“…2 shows typical IR spectra for pure PICA polymer, a simultaneous IPN of PAAm/PICA and pure PAAm network. The characteristic peaks of PICA homopolymer [26][27][28] were observed at 2 800 -3 400 cm -1 , a broad 1OH stretching absorption peak; at 1 715 cm -1 for normal carboxylic acid (C2O) stretching, at 1 400 cm -1 for C1O1H in-plane bending interactions, at 1 200 cm -1 C1O stretching dimer, at 920 cm -1 O1H out-of-plane bending. IR spectrum of pure PAAm gel shows the main absorption peaks at 3 200 -3 400 cm -1 for N1H stretching, at ca.…”