Ultraviolet radiation aging impact on physicochemical properties of crosslinked polyethylene cable insulation

Abstract

This article deals within the study of the effect of artificial radiations on physical and chemical properties of the crosslinked polyethylene (XLPE) material, widely used for manufacturing high-voltage cables. Within this framework, several experimental tests, using essential characterization techniques, were performed to study XLPE behavior under ultraviolet (UV) aging. Attenuated total reflection Fourier transform infrared spectroscopy, differential scanning calorimetry, thermogravimetric analysis, X-ray diffraction, and scanning electron microscopy were thus carried out to identify the main structure changes of the material before and after exposure to UV. In addition, appearance changes and DC (Direct Current) volume resistivity were evaluated. The obtained results showed that UV radiation has a great effect on the physicochemical properties of XLPE cable insulation.

Enhancement of Service Life and Electrical Insulation Properties of Polymeric Cables With the Optimum Content of Aromatic Voltage Stabilizer

“…Hence, the Stage II is referred as the main decomposition as it involves the thermal degradation of the material under study. Stage III from 400 to 700°C represents the departure of carbon in the form of CO 2 . The increase in the “ T d ” with the voltage stabilizer addition can be considered favorable for the electrical insulation application as it increases the thermal stability of the XLPE.…”

Rheological/thermal properties of poly(ethylene terephthalate) modified by chain extenders of pyromellitic dianhydride and pentaerythritol

“…Since the melting temperature depends on the size of the crystal, the melting temperature decreases with increasing branching 53,65 . The crystal thickness (L) of a polymer could be obtained by Gibbs–Thomson equation (Equation )) 66 ; where, T m is the melting point (K) and T ° m is the equilibrium melting temperature of an infinite crystal. Also, Δ H ° m and σ e are the melting enthalpy of an ideal polymer crystal per unit volume which is equal to 171 j/cm 3 , 67 and the surface free energy per unit area, correspondingly.…”

“…Since the melting temperature depends on the size of the crystal, the melting temperature decreases with increasing branching. 53,65 The crystal thickness (L) of a polymer could be obtained by Gibbs-Thomson equation (Equation (2)) 66 ;…”

Enhancing the High Voltage XLPE Cable Insulation Characteristics Using Functionalized TiO<sub>2</sub> Nanoparticles

“…The X-ray diffraction pattern of the tested XLPE samples indicated an amorphous hallo and two major crystalline peaks at 2θ=21.40° (d (interplanar distance)=4.15112 Å) and 2θ=24.06° (d=3.777 Å), Figure 4a, [30]. Other small peaks can be observed at 2θ=29.8784° (d=2.99052 Å), 2θ=39.573° (d=2.27740 Å), 2θ=41.4867° (d=2.17667 Å), 2θ=42.8169° (d=2.11207 Å), 2θ=43.7564° (d=2.06888 Å), 2θ=46.7704° (d=1.94234 Å), 2θ=52.8265° (d=1.73306 Å), 2θ=54.5422° (d=1.68253 Å), 2θ=57.1883° (d=1.61081 Å), and 2θ=61.4206° (d=1.50833 Å).…”