Thermal degradation kinetics of polyurethane/organically modified montmorillonite clay nanocomposites by TGA

Pashaei, Shahryar and Siddaramaiah, . and Ahmed, Akheel (2010) Thermal degradation kinetics of polyurethane/organically modified montmorillonite clay nanocomposites by TGA. Journal of Macromolecular Science, Part A, 47 (8). pp. 777-783. ISSN 1520-5738

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Abstract

Polyurethane (PU) has been prepared by using polyether polyol (jagropol oil) and 1,6- hexamethylene diisocyanate (HMDI) as a cross-linker. The organically modified montmorillonite clay (MMT) is well-dispersed into urethane matrix by an in situ polymerization method. A series of PU/MMT nanocomposites have been prepared by incorporating varying amounts of nanoclay viz., 1, 3, 5 and 6 wt %. Thermogravimetric analysis (TGA) of the PU/MMT nanocomposites has been performed in order to establish the thermal stability and their mode of thermal degradation. The TGA thermograms exhibited the fact that nanocomposites have a higher decomposition temperature in comparison with the pristine PU. It was found that the thermal degradation of all PU nanocomposites takes place in three steps. All the nanocomposites were stable up to 205 degrees C. Degradation kinetic parameters of the composites have been calculated for each step of the thermal degradation processes using three mathematical models namely, Horowitz-Metzger, Coats-Redfern and Broido's methods.

Item Type:	Article
Subjects:	C Chemical Science > Chemistry
Divisions:	Department of > Chemistry
Depositing User:	LA manjunath user
Date Deposited:	29 Jul 2019 03:11
Last Modified:	12 Jul 2022 09:51
URI:	http://eprints.uni-mysore.ac.in/id/eprint/5981

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