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Synthesis and molecular-mass characteristics of some cardo poly(benzimidazoles)

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Abstract

The GPC procedure for analyzing molecular mass characteristics of cardo poly(benzimidazoles) has been developed. In most cases, the reaction between 4,4′-oxydibenzene-1,2-diamine and 4,4′-(3-oxo-1,3-dihydroisobenzofuran-1,1-diyl)dibenzoic acid in Eaton’s reagent is accompanied by formation of a microgel. Depending on the synthesis conditions (temperature, duration of heating, and content of phosphorus pentoxide in the reaction mixture), polymers with both unimodal and bimodal molecular mass distributions can be prepared. Formation of the microgel fraction is observed for many representatives of poly(benzimidazoles) of various chemical structures. Based on the experimental evidence, the most probable pathway is suggested for the branching side reaction of poly(benzimidazoles) during their synthesis in Eaton’s reagent.

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Authors and Affiliations

  1. Nesmeyanov Institute of Organoelement Compounds, Russian Academy of Sciences, ul. Vavilova 28, Moscow, 119991, Russia

    A. I. Fomenkov, I. V. Blagodatskikh, Iv. I. Ponomarev, Yu. A. Volkova & I. I. Ponomarev

  2. Faculty of Physics, Moscow State University, Moscow, 119992, Russia

    A. R. Khokhlov

Authors
  1. A. I. Fomenkov
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  2. I. V. Blagodatskikh
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  3. Iv. I. Ponomarev
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  4. Yu. A. Volkova
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  5. I. I. Ponomarev
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  6. A. R. Khokhlov
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Correspondence to A. I. Fomenkov.

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Original Russian Text © A.I. Fomenkov, I.V. Blagodatskikh, Iv.I. Ponomarev, Yu.A. Volkova, I.I. Ponomarev, A.R. Khokhlov, 2009, published in Vysokomolekulyarnye Soedineniya, Ser. B, 2009, Vol. 51, No. 5, pp. 874–882.

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Fomenkov, A.I., Blagodatskikh, I.V., Ponomarev, I.I. et al. Synthesis and molecular-mass characteristics of some cardo poly(benzimidazoles). Polym. Sci. Ser. B 51, 166–173 (2009). https://doi.org/10.1134/S1560090409050030

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  • DOI: https://doi.org/10.1134/S1560090409050030

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