Multi scale aging assessment of low-voltage cables subjected to radio-chemical aging: Towards an electrical diagnostic technique

Suraci, Simone Vincenzo; Fabiani, Davide; Roland, Sébastien; Colin, Xavier

doi:10.1016/j.polymertesting.2021.107352

Cited by 17 publications

(25 citation statements)

References 39 publications

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“…Polymer materials are subjected to various environmental stressors during their lifetime, which can lead to gradual degradation, or aging, of the materials [1][2][3]. Aging alters the physical properties of the polymer, such as elasticity, toughness, dielectric and combustion properties [4][5][6]. A particularly common aging mechanism is oxidative reactions due to elevated temperature or exposure to radiation.…”

Section: Introductionmentioning

confidence: 99%

Analytical and Numerical Modeling of Degradation and Pyrolysis of Polyethylene: Measuring Aging with Thermogravimetry

Verho

Vaari

2022

Polymers

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Aging reactions due to heat and radiation cause chain scissions and cross-linking in cross-linked polyethylene (XLPE). We have developed theoretical and numerical graph models to study the evolution of the gel fraction and network properties during aging as well as the mass loss during thermogravimetric analysis (TGA). Our analytical and kinetic Monte Carlo (KMC) based models that combine degradation reactions and a simple vaporization model can quantitatively predict TGA curves for aged XLPE. Fitting the model to experimental TGA data yields the number of scission reactions, showing that thermogravimetry combined with our models can present a nondestructive aging characterization tool for lifetime prediction.

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Section: Introductionmentioning

confidence: 99%

Analytical and Numerical Modeling of Degradation and Pyrolysis of Polyethylene: Measuring Aging with Thermogravimetry

Verho

Vaari

2022

Polymers

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“…This phenomenon may be assigned to the reduction of antioxidant protection by the ATH molecules. As seen in [13,46,47], ATH may deactivate by physical absorption the -OH group inside the phenolic antioxidant, hindering the diffusion of antioxidant in the polymer bulk and reducing its oxidative protection. As a result, the antioxidant kinetics results to be limited, leading to an earlier oxidation onsite time.…”

Section: Resultsmentioning

confidence: 99%

“…With reference to the electrical techniques, dielectric spectroscopy (DS) is gaining more and more interest in recent years [13,[15][16][17][19][20][21][22]. This technique measures the polarization of the insulating material under an applied electric field.…”

Section: Introductionmentioning

confidence: 99%

“…This technique measures the polarization of the insulating material under an applied electric field. The reference quantity, the complex permittivity, was demonstrated to properly follow the ageing evolution of the insulation system [9,13,14,22]. In addition, the technique is completely non-destructive, and the measurements are referred to the entire cable length since the voltage is applied through the inner conductor, which is accessible through the cable terminations [9].…”

Section: Introductionmentioning

confidence: 99%

“…Nowadays, various works have already presented the consistency between the variation of the abovementioned tested quantities with the ageing development for various common polymeric materials [13,17,19,[21][22][23][24][25][26]. Nonetheless, this huge amount of data was not properly investigated through in-depth data analysis techniques such as the principal component analysis (PCA).…”

Section: Introductionmentioning

confidence: 99%

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Ageing evaluation of cable insulations subjected to radiation ageing: Application of principal component analyses to Fourier Transform Infra‐Red and dielectric spectroscopy

et al. 2022

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The evolution of properties of crosslinked polyethylene (XLPE)-based insulating materials under radio-chemical ageing conditions is presented and discussed. In total, seven different polymer compounds were tested, characterised by an increasing quantity of additives, for example, antioxidants (AOs) and fillers as flame retardants. Samples were analysed using different testing techniques, that is, Fourier Transform Infra-Red and dielectric spectroscopy. This allowed a broad characterisation of the polymer, bringing to good correlations between the arising of new chemical groups caused by ageing and the modifications on the complex permittivity. Phenol-based AOs are found to be the most efficient in terms of protection against oxidation. On the contrary, flame retardants are concluded not to have any impact on the material ageing. Acquired data were then treated using the principal component analysis. The data treatment successfully distinguished the material composition (with and without additives) and the ageing environments. The results confirm the relevance of this analysis in understanding the impact of irradiation on the chemical and functional properties of the polymer materials studied.

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Accelerated oxidation of epoxy thermosets with increased O2 pressure

Celina,

Linde,

Barrett

et al. 2024

Polymer Degradation and Stability

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Multi scale aging assessment of low-voltage cables subjected to radio-chemical aging: Towards an electrical diagnostic technique

Cited by 17 publications

References 39 publications

Analytical and Numerical Modeling of Degradation and Pyrolysis of Polyethylene: Measuring Aging with Thermogravimetry

Analytical and Numerical Modeling of Degradation and Pyrolysis of Polyethylene: Measuring Aging with Thermogravimetry

Ageing evaluation of cable insulations subjected to radiation ageing: Application of principal component analyses to Fourier Transform Infra‐Red and dielectric spectroscopy

Accelerated oxidation of epoxy thermosets with increased O2 pressure

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