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Thermogravimetric Analysis of Superabsorbing Polyacrylic Hydrogel

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Abstract:

The thermogravimetric analysis of superabsorbing polyacrylic hydrogel dehydration, performed under non-isothermal conditions at different heating rates was discussed. Particularly, the influence of the heating rate on the obtained results is given in detail. For this purpose the Weibull distribution function was applied. The thermogravimetric curve when the heating rate tends to zero was evaluated. The activation energy E = 63 kJ/mol, pre-exponential factor A = 2.97 × 108 min−1, and rate constant k = 2.76 × 10−3 min−1 were determined on the basis of this curve.

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Periodical:

Materials Science Forum (Volume 494)

Pages:

193-198

DOI:

https://doi.org/10.4028/www.scientific.net/MSF.494.193

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Online since:

September 2005

Authors:

B. Janković, B. Adnadjević, J. Jovanović, D. Minić, Lj. Kolar-Anić

Keywords:

Activation Energy, Thermo Gravimetric Analysis (TGA), Weibull Distribution Function

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© 2005 Trans Tech Publications Ltd. All Rights Reserved

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