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Thermal degradation of alkyl triphenyl phosphonium intercalated montmorillonites

An isothermal kinetic study

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Abstract

The decomposition mechanism of intercalated montmorillonites at a particular temperature region and the activation energy involved in it are the two important aspects which determines the thermal stability of intercalated montmorillonites. In this study, montmorillonite was intercalated with alkyl (methyl, ethyl, propyl, and dodecyl) triphenyl phosphonium intercalates. Differential thermogravimetric analysis of each intercalated montmorillonites showed different peaks with associated organic loss at different temperature zone. Intercalated montmorillonites were subjected to isothermal kinetic analysis corresponding to selected temperature zone obtained from DTG peaks. Activation energies of organic decomposition process at selected temperature zones were determined. Mass spectral analysis and FTIR were done to understand the decomposition mechanisms and to relate them with the estimated activation energies.

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Acknowledgements

This study was supported by Council of Scientific and Industrial Research (CSIR) fellowship grant to Saheli Ganguly (currently working as senior research fellow in C.G.C.R.I., Kolkata). Authors would like to thank XRD, Instrumentation, and TEM section of CGCRI for providing the characterization facilities.

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Authors and Affiliations

  1. Advanced Clay and Traditional Ceramics Division, Central Glass and Ceramic Research Institute, CSIR, 196, Raja S.C. Mullick Road, Kolkata, West Bengal, 700032, India

    Saheli Ganguly, Kausik Dana, Tapas Kumar Mukhopadhyay & Sankar Ghatak

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  1. Saheli Ganguly
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  2. Kausik Dana
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  3. Tapas Kumar Mukhopadhyay
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  4. Sankar Ghatak
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Correspondence to Kausik Dana.

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Ganguly, S., Dana, K., Mukhopadhyay, T.K. et al. Thermal degradation of alkyl triphenyl phosphonium intercalated montmorillonites. J Therm Anal Calorim 105, 199–209 (2011). https://doi.org/10.1007/s10973-011-1356-5

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  • DOI: https://doi.org/10.1007/s10973-011-1356-5

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