NDLI: Structural, Optical, and Electrical Parameters of Doped PVA/PVP Blend with TPAI or THAI Salt.

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Structural, Optical, and Electrical Parameters of Doped PVA/PVP Blend with TPAI or THAI Salt.

Content Provider	Europe PMC
Author	El-Naggar, A. M. Brnawi, Shadia Z. Kamal, A. M. Albassam, A. A. Heiba, Zein K. Mohamed, Mohamed Bakr
Editor	García-Martínez, Jesús-María Scaffaro, Roberto
Copyright Year	2023
Abstract	The 70% polyvinyl alcohol/30% polyvinyl pyrrolidone (PVA/PVP) polymer blends, with different weight ratios of tetrapropylammonium iodide (TPAI) or tetrahexylammonium iodide (THAI) salt, were prepared using dimethyl sulfoxide (DMSO) as a solvent. The X-ray diffraction technique was used to trace the crystalline nature of the formed blends. The SEM and EDS techniques were applied to figure out the morphology of the blends. The variation in the FTIR vibrational bands was used to investigate the chemical composition and the effect of different salt doping on the functional groups of the host blend. The influence of the salt type (TPAI or THAI) and its ratio on the linear and nonlinear optical parameters for the doped blends were investigated in detail. Absorbance and reflectance are highly enhanced in the UV region reaching a maximum for the blend with 24% TPAI or THAI; so, it can be employed as shielding materials for UVA and UVB types. The direct (5.1 eV) and indirect (4.8 eV) optical bandgaps were reduced continuously to (3.52, 3.63 eV) and (3.45, 3.51 eV) while increasing the content of TPAI or THAI, respectively. The blend doped with 24% wt TPAI exhibited the highest refractive index (around 3.5 in 400–800 nm). The DC conductivity is affected by the content and type of salt, its dispersion, and blend-salt interaction. The activation energies of different blends were obtained by applying the Arrhenius formula.
Journal	Polymers
Volume Number	15
PubMed Central reference number	PMC10302065
Issue Number	12
PubMed reference number	37376307
e-ISSN	20734360
DOI	10.3390/polym15122661
Language	English
Publisher	MDPI
Publisher Date	2023-06-13
Access Restriction	Open
Rights License	Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (https://creativecommons.org/licenses/by/4.0/). © 2023 by the authors.
Subject Keyword	PVA/PVP TPAI THAI DC electric activation energy optical
Content Type	Text
Resource Type	Article
Subject	Chemistry Polymers and Plastics

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