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Thermodynamics of Proton Association of Polyacrylates and Polymethacrylates in NaCl(aq)

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Abstract

Enthalpies of protonation of polyacrylates and polymethacrylates with different molecular weights in aqueous NaCl solutions, 0 ≤ I ≤ 2 mol-L−1 were determined by titration calorimetry at 25°C. Δ H values are dependent on both the neutralization degree, α, and the molecular weight of polyacids. TΔ S of protonation was obtained using pK values already reported and the present Δ H results. Empirical equations for the dependence on I, α, and molecular weight are reported for both Δ H and TΔ S.

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Authors and Affiliations

  1. Dipartimento di Chimica Inorganica, Chimica Analitica e Chimica Fisica, Università di Messina, Salita Sperone 31, I-98166 Messina (Vill, S. Agata), Italy

    Concetta De Stefano, Ottavia Giuffrè, Alberto Pettignano & Silvio Sammartano

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  1. Concetta De Stefano
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  2. Ottavia Giuffrè
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  3. Alberto Pettignano
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  4. Silvio Sammartano
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De Stefano, C., Giuffrè, O., Pettignano, A. et al. Thermodynamics of Proton Association of Polyacrylates and Polymethacrylates in NaCl(aq) . Journal of Solution Chemistry 32, 967–976 (2003). https://doi.org/10.1023/B:JOSL.0000017061.25779.6e

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  • DOI: https://doi.org/10.1023/B:JOSL.0000017061.25779.6e

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