Influence of Nanoparticles on the Dielectric Response of a Single Component Resin Based on Polyesterimide

Abstract

The influence of various types of nanoparticle fillers with the same diameter of 20 nm were separately incorporated into a single component impregnating resin based on a polyesterimide (PEI) matrix and its subsequent changes in complex relative permittivity were studied. In this paper, nanoparticles of Al2O3 and ZnO were dispersed into PEI (with 0.5 and 1 wt.%) to prepare nanocomposite polymer. Dielectric frequency spectroscopy was used to measure the dependence of the real and imaginary parts of complex relative permittivity within the frequency range of 1 mHz to 1 MHz at a temperature range from +20 °C to +120 °C. The presence of weight concentration of nanoparticles in the PEI resin has an impact on the segmental dynamics of the polymer chain and changed the charge distribution in the given system. The changes detected in the 1H NMR spectra confirm that dispersed nanoparticles in PEI lead to the formation of loose structures, which results in higher polymer chain mobility. A shift of the local relaxation peaks, corresponding to the α-relaxation process, and higher mobility of the polymer chains in the spectra of imaginary permittivity of the investigated nanocomposites was observed.

Green and Facile Synthesis of Hybrid Composites with Ultralow Dielectric Properties from Water-Soluble Polyimide and Dual-Porous Silica Nanoparticles

“…Furthermore, with the introduction of DPS, the chain packing of the BPDA-pPDA polymer backbone was relaxed, resulting in reduced polarization. − The decrease in polarization related to dispersibility improvement can be confirmed again through the results for D f . The D f of PI-C/DPS-# is much lower than that of PI-A/DPS-# at all DPS contents, both at the measurement frequencies of 10 and 28 GHz, as shown in Figure b,d.…”

Carbon-Dot-Containing Poly(methyl methacrylate) for Highly Dielectric Nanomaterials

“…In polymer-based nanodielectrics, nanoparticles are reinforced into polymers with the intention of enhanced dielectric response. 4,5 Polymer nanocomposite films with high dielectric constant and low loss have attracted much attention because of their unique properties and wide applications. 6 Generally, common polymers with a low dielectric constant make commercial application difficult, which can be overcome by mixing them with nanoparticles of a high dielectric constant.…”

“…In polymer-based nanodielectrics, nanoparticles are reinforced into polymers with the intention of enhanced dielectric response. , Polymer nanocomposite films with high dielectric constant and low loss have attracted much attention because of their unique properties and wide applications . Generally, common polymers with a low dielectric constant make commercial application difficult, which can be overcome by mixing them with nanoparticles of a high dielectric constant. , The enormous surface-to-volume ratio, which enhances the number of particle–matrix interactions and amplifies their influence on the material’s overall properties, is one of the key benefits of utilizing particles at the nanoscale .…”

Preparation and characterization of photo‐decomposable ester‐containing semi‐alicyclic polyimide alignment layers for potential applications in in‐plane switching thin‐film transistor liquid crystal display devices

“…Ester bonds have been widely incorporated into the molecular structures of PIs due to the good planarity, low humidity sensitivity, and good adhesion to various substrates. The derived ester‐containing PIs, or polyesterimides (PEIs) have been widely used in electrical and electronic insulating or other high‐tech fields 30,31 . Meanwhile, the above‐mentioned advantages of the ester bonds are also desired for LC alignment.…”

“…The derived ester-containing PIs, or polyesterimides (PEIs) have been widely used in electrical and electronic insulating or other high-tech fields. 30,31 Meanwhile, the above-mentioned advantages of the ester bonds are also desired for LC alignment. In practice, estercontaining PIs have been reported as the rubbing types of PI alignment layers to LC molecules.…”