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Mechanistic study of thermal behavior of poly(vinyl acetate) blended with aluminum tribromide: an investigation aided by IR and Py–GC–MS techniques

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Abstract

Thermal behavior of poly(vinyl acetate) in the presence of aluminum tribromide (thin film cast from common solvent) is studied by thermoanalytical, IR, and Py–GC–MS techniques. Pyrolytical characterization reveals two-step degradation for neat polymer whereas blends pyrolyze in three stages. The detailed examination of blends was performed to identify the compounds formed. Moreover, the mixed film sample was heated at 200, 300, and 400 °C and residues were analyzed by IR spectroscopy in order to follow the progress of degradation. Acetic acid does not appear as major product of the blends’ degradation due to the formation of acetyl bromide, development of polyene backbone at high temperatures with intact acetate units, conversion of acetate to formate under the influence of additive, etc. The effective flame retardance of additive for polymer is noteworthy. Various schemes have been outlined to show the probable degradation mechanism.

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Acknowledgments

The authors would like to express their gratitude to PINSTECH, Islamabad, Pakistan for providing the opportunity to undertake this research work. Messrs Nadeem Ahmad, Muhammad Adeel Khattak (SA-II, CD), and Muhammad Saleem (Draftsman) are acknowledged for drawing of figures and technical help.

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Authors and Affiliations

  1. Chemistry Division, Directorate of Science, PINSTECH, Nilore, Islamabad, Pakistan

    M. Arshad

  2. NLP, Nilore, Islamabad, Pakistan

    K. Masud

  3. Department of Chemistry, Bahauddin Zakariya University, Multan, Pakistan

    M. Arif

  4. Department of Chemistry, Quaid-i-Azam University, Islamabad, Pakistan

    A. Saeed

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  1. M. Arshad
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  2. K. Masud
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  3. M. Arif
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Correspondence to M. Arshad.

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Arshad, M., Masud, K., Arif, M. et al. Mechanistic study of thermal behavior of poly(vinyl acetate) blended with aluminum tribromide: an investigation aided by IR and Py–GC–MS techniques. J Therm Anal Calorim 115, 759–769 (2014). https://doi.org/10.1007/s10973-013-3222-0

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