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Vol. 34 No. 2 (2022): Vol 34 Issue 2

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Effect of NaBr on the Structural, Thermal and Mechanical Properties of HPMC:NaBr Composite Films

https://doi.org/10.14233/ajchem.2022.23507
Sunil Kumar
Department of Physics, S.S. Arts College and T.P. Science Institute, Sankeshwar-591313, India ; Department of P.G. Studies and Research in Physics, Kuvempu University, Jnanasahyadri, Shankaraghatta-577451, India
S. Raghu
Department of Physics, K.L.E. Society’s, Basavaprabhu Kore Arts, Science and Commerce College, Chikodi-591201, India
T. Demappa
Department of Polymer Science, Sir M. Visvesvaraya P.G. Centre, University of Mysore, Tubinakere, Mandya-570017, India
J. Sannappa
Department of P.G. Studies and Research in Physics, Kuvempu University, Jnanasahyadri, Shankaraghatta-577451, India

Corresponding Author(s) : J. Sannappa

sannappaj2012@gmail.com

Asian Journal of Chemistry, Vol. 34 No. 2 (2022): Vol 34 Issue 2

Abstract

The hydroxypropyl methylcellulose (HPMC):sodium bromide (NaBr) composite films were prepared using different concentrations by solution casting method. The crystalline percentage of the pure HPMC was reduced from 74% to 60% upon the incorporation of 0.7 wt.% of NaBr salt, which suggests that the NaBr salt disrupted the host polymer crystalline phase. The two-phase microstructure in the morphological images reflects the phase separation at different concentrations of dopant. The functional studies revealed the considerable variation of intensity and the shift of peaks due to the action of NaBr in the host polymer matrix. The HPMC showed a large increase in the glass transition temperature (Tg) from 65 ºC to 86 ºC and simultaneously reduction in the weight percent loss was observed. The mechanical analysis revealed that the added dopant has a significant effect on the mechanical properties of HPMC.

Keywords

Hydroxypropyl methylcellulose Sodium bromide Solution cast method Thermal property
Kumar, S., Raghu, S., Demappa, T., & Sannappa, J. (2022). Effect of NaBr on the Structural, Thermal and Mechanical Properties of HPMC:NaBr Composite Films. Asian Journal of Chemistry, 34(2), 305–310. https://doi.org/10.14233/ajchem.2022.23507
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