期刊
JOURNAL OF MOLECULAR STRUCTURE
卷 1259, 期 -, 页码 -出版社
ELSEVIER
DOI: 10.1016/j.molstruc.2022.132738
关键词
DSC; Positron annihilation spectroscopy; SEM; Dielectric spectroscopy; casting method; PVA
The Casting method is used to produce nano-composite polymeric thin films with varied aluminum content. The morphology, dielectric properties, and microstructure changes of the thin films are investigated using various techniques.
The Casting method is used to produce nano-composite polymeric thin films (PVA/Al) with varied aluminum content (x = 0.0, 0.04, 0.08, 0.1wt.%). The morphology of thin films is examined by Scanning electron microscopy (SEM), and it is used to approve the homogenous nature of the prepared thin films and to determine the grain size. The obtained nano-composite thin films reveal an enhancement of dielectric properties by adding the nano-filler to polymeric matrix. Also, the Differential Scanning Calorimetry (DSC) studies show an increase in the glass temperature (Tg) by increasing Al content. The microstructure changes of the prepared PVA/Al NPs composite films are investigated using the positron annihilation lifetime (PAL) and Doppler broadening (DB) techniques. The interactions between the PVA and Al NPs through the formation of hydrogen bonding modify the size and concentration of the free volume holes. (c) 2022 Elsevier B.V. All rights reserved.
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