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“…The copolymer samples, which were obtained at higher ratios of 4-VIm, are partially swelling in water. As the feed content of VPA increases, the resultant copolymers become insoluble in water, which may be due to interpolymer complexation [9]. The chemical structure of the copolymers is displayed in Fig.…”

Section: Resultsmentioning

confidence: 99%

Proton conducting copolymers on the basis of vinylphosphonic acid and 4-vinylimidazole

et al. 2003

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“…It is known fact that poly(VIM) as a polybase polymer forms interpolymer complex with poly(acrylic acid) through a donor-acceptor interaction between the imidazole rings and carboxylate anions. [29,30] The structure and composition of synthesized copolymer is also confirmed by 1 H NMR analysis (Figure 3). The comparative analysis of 1 H NMR spectra of the homopolymers of VIM and AN and poly(VIM-co-AN), which are synthesized under similar conditions, indicates the significant changes in the chemical shifts of imidazole ring protons and backbone CH protons of VIM and AN linkages, when these groups form the backbone of the copolymer macromolecules.…”

Section: Some Observations On the Peculiarities Of Copolymerizationmentioning

confidence: 65%

Synthesis and Characterization of Poly(N‐vinylimidazole‐co‐acrylonitrile) and Determination of Monomer Reactivity Ratios

Pekel

Rzaev

Güven

2004

Macro Chemistry & Physics

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Summary: Radical‐initiated solution copolymerization of N‐vinylimidazole (VIM) and acrylonitrile (AN) was carried out with 2,2′‐azobisisobutyronitrile (AIBN) as an initiator in benzene at 70 °C in nitrogen atmosphere. The structure and composition of synthesized copolymers for a wide range of monomer feeds were determined by FTIR, 1H and 13C NMR spectroscopy with the aid of recorded analytical absorption bands for VIM (667 cm−1, CN of imidazole ring) and AN (2 242 cm−1, CN group), as well as by using the areas of proton and carbon atom signals from corresponding functional groups of monomer units. Monomer reactivity ratios for VIM (M1)‐AN (M2) pair were determined by nonlinear regression (NLR), Kelen–Tüdös (KT) and Fineman–Ross (FR) methods. They were found to be r1 = 0.24 and r2 = 0.15 for the NLR method, r1 = 0.22 and r2 = 0.094 for the KT method, and r1 = 0.24 and r2 = 0.12 for the FR method, respectively. The relatively high activity observed of VIM growing macroradical and the results of FTIR and 1H NMR structural analysis of copolymers suggest the formation of complexed linkages between monomers and growing radicals in chain propagation reactions. Similar complexation between monomer–comonomer units in the structure of formed macromolecules showed an increase in isotactic triad fractions in the copolymer.Complex formation between the imidazole ring and nitrile group in both the monomer mixture and chain growing reactions.imageComplex formation between the imidazole ring and nitrile group in both the monomer mixture and chain growing reactions.

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“…The acid–base properties of poly(1‐vinylazoles) in aqueous solution have been investigated and it is found that the reactions of poly(1‐vinylazoles) with acid resulted in the protonation of the azole cycle 15. In the current work, energetic salt polymers ( 14 – 19 ) also can be prepared by protonation of poly(1‐vinyl‐1,2,4‐triazole) ( 10 ) with inorganic (perchloric acid) or organic acids (4,5‐dinitro‐imidazole, 3,5‐dinitro‐1,2,4‐triazole, 5‐nitrotetrazole and picric acid).…”

Section: Resultsmentioning

confidence: 99%

Energetic polymer salts from 1‐vinyl‐1,2,4‐triazole derivatives

Xue

Gao

Shreeve

2008

J. Polym. Sci. A Polym. Chem.

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Energetic polymers salts from 1‐vinyl‐1,2,4‐triazole derivatives have been synthesized via free radical polymerization of 1‐vinyl‐1,2,4‐triazolium monomer salts or by protonation of poly(1‐vinyl‐1,2,4‐triazole) with inorganic or organic acids. Standard enthalpies of formation of the new monomer salts were calculated using the computationally feasible DFT(B3LYP) and MP2 methods in conjunction with an empirical approach based on densities of salts. Compared with the monomer salts, the polymer salts have good thermal properties with high densities > 1.5 g cm−3. © 2008 Wiley Periodicals, Inc. J Polym Sci Part A: Polym Chem 46: 2414–2421, 2008

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Cited by 27 publications

References 2 publications

Proton conducting copolymers on the basis of vinylphosphonic acid and 4-vinylimidazole

Proton conducting copolymers on the basis of vinylphosphonic acid and 4-vinylimidazole

Synthesis and Characterization of Poly(N‐vinylimidazole‐co‐acrylonitrile) and Determination of Monomer Reactivity Ratios

Energetic polymer salts from 1‐vinyl‐1,2,4‐triazole derivatives

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