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Isothermal kinetics of dehydration of equilibrium swollen poly(acrylic acid) hydrogel

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Abstract

An isothermal dehydration of equilibrium swollen poly(acrylic acid) hydrogel in the temperature range from 306 to 361 K was investigated. The specific parameters connected with shape of the conversion curves were defined. The activation parameters (E, lnA) of the isothermal dehydration of equilibrium swollen poly(acrylic acid) hydrogel were calculated, using Johnson-Mehl-Avrami (JMA), ‘initial rate’ and ’stationary point’ methods. The reaction models for the investigated dehydration are determined using the ‘model-fitting’ method. It was established that both, the reaction model and activation parameters of the hydrogel dehydration were completely different for the isothermal process than for the non-isothermal one. It was found that the increase in dehydration temperature lead to the changes in isothermal kinetic model for the investigated hydrogel dehydration. It was established that the apparent activation energy (E) of hydrogel dehydration is similar to the value of the molar enthalpy of water evaporation.

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References

  1. N. Peppas, Hydrogels in Medicine and Pharmacy, Vol. I: Fundamentals, CRC, Boca Raton, FL 1986.

    Google Scholar 

  2. E. Karadağ and D. Saraydin, Polym. Bull., 48 (2002) 299.

    Article  Google Scholar 

  3. D. Saraydin and Y. Caldiran, Polym. Bull., 46 (2001) 91.

    Article  CAS  Google Scholar 

  4. I. Katime, J.L. Velada, R. Novoa, E. Diaz de Apodaca, J. Puig and E. Mendizabal, Polym. Intern., 40 (1996) 281.

    Article  CAS  Google Scholar 

  5. E. Karadağ and D. Saraydin, Turk. J. Chem., 26 (2002) 863.

    Google Scholar 

  6. P. M. de la Torre, S. Torrado and S. Torrado, Biomaterials, 24 (2003) 1459.

    Article  Google Scholar 

  7. B. Janković, B. Adnağević and J. Jovanović, J. Therm. Anal. Cal., 82 (2005) 7.

    Article  Google Scholar 

  8. B. Janković, B. Adnağević and J. Jovanović, Thermochim. Acta, 452 (2007) 106.

    Article  Google Scholar 

  9. J. Jovanović and B. Adnağević, XLI Consultation of Serbian Chemical Society, SSHD, Belgrade, 23–24 January, Book of Abstracts, HM13, 2003, p. 119.

    Google Scholar 

  10. W. A. Johnson and R. F. Mehl, Trans. Am. Inst. Miner. (Metall.) Eng., 135 (1939) 416.

    Google Scholar 

  11. M. Avrami, J. Chem. Phys., 7 (1939) 1103.

    Article  CAS  Google Scholar 

  12. I. Klarić, U. Roje and T. Kovačić, J. Therm. Anal. Cal., 45 (1995) 1373.

    Article  Google Scholar 

  13. J. D. Hancock and J. H. Sharp, J. Amer. Ceram. Soc., 55 (1972) 74.

    Article  CAS  Google Scholar 

  14. M. E. Brown, D. Dollimore and A. K. Galwey, Reactions in the Solid State in Comprehensive Chemical Kinetics, H. Bamford, C. F. H. Tipper, Eds, Elsevier, Amsterdam 1980, Vol. 22.

    Google Scholar 

  15. S. Vyazovkin and C. A. Wight, Thermochim. Acta, 340–341 (1999) 53.

    Article  Google Scholar 

  16. S. Vyazovkin, J. S. Clawson and C. A. Wight, Chem. Mater., 13 (2001) 960.

    Article  CAS  Google Scholar 

  17. S. Vyazovkin and C. A. Wight, Int. Rev. Phys. Chem., 17 (1998) 407.

    Article  CAS  Google Scholar 

  18. F. Rodante, G. Catalani and S. Vecchio, J. Therm. Anal. Cal., 68 (2002) 689.

    Article  CAS  Google Scholar 

  19. S. Vyazovkin and C. A. Wight, J. Phys. Chem. A, 101 (1997) 8279.

    Article  CAS  Google Scholar 

  20. M. L. Franklin and T. B. Flanagan, J. Phys. Chem., 75 (1971) 1272.

    Article  Google Scholar 

  21. S. F. Hilbert, J. Br. Ceram. Soc., 6 (1969) 11.

    Google Scholar 

  22. R. F. Walker, Trans. Faraday Soc., 65 (1969) 3324.

    Article  CAS  Google Scholar 

  23. R. C. Eckhardt and T. B. Flanagan, Trans. Faraday Soc., 60 (1964) 1289.

    Article  CAS  Google Scholar 

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Authors and Affiliations

  1. Faculty of Physical Chemistry, University of Belgrade, Studentski trg 12-16, P.O. Box 137, 11001, Belgrade, Serbia and Montenegro

    B. Janković, B. Adnađević & J. Jovanović

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  1. B. Janković
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  2. B. Adnađević
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  3. J. Jovanović
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Correspondence to B. Janković.

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Janković, B., Adnađević, B. & Jovanović, J. Isothermal kinetics of dehydration of equilibrium swollen poly(acrylic acid) hydrogel. J Therm Anal Calorim 92, 821–827 (2008). https://doi.org/10.1007/s10973-007-7558-1

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  • DOI: https://doi.org/10.1007/s10973-007-7558-1

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