Effect of overload current values on the fire characteristics of polyethylene (PE) copper wires

Deng, Jun; Lin, Qingwen; Li, Yang; Wang, Caiping; Wang, Huaibin; Man, Pengrui

doi:10.1007/s10973-023-12522-5

Cited by 4 publications

(2 citation statements)

References 26 publications

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Section: Ftir Analysismentioning

confidence: 98%

“…The spectral bands in the range of 1750-1652 cm −1 were attributed to the stretching vibrations of unconjugated C=O and C=C bonds [33]. The bands around 1460 cm −1 and 732 cm −1 corresponded to the scissor vibrations of the C-H bonds in the CH2 groups in the aliphatic chains [34,35,36,37,38]. Thus, the main spectral components produced during the pyrolysis of the XLPE insulation material are C-H stretching, H2O, CO2, C-H scissor vibrations, and C=O and C=C stretching.…”

Section: Ftir Analysismentioning

confidence: 99%

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Effects of Overload on Thermal Decomposition Kinetics of Cross-Linked Polyethylene Copper Wires

Jia,

Man,

Guo

et al. 2023

Polymers

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During an overload fault in an energized wire, the hot metal core modifies the structure of the insulation material. Therefore, understanding the thermal decomposition kinetics of the insulation materials of the overloaded wire is essential for fire prevention and control. This study investigates the thermal decomposition process of new and overloaded cross-linked polyethylene (XLPE) copper wires using thermogravimetry–Fourier-transform infrared spectroscopy and cone calorimetry. The thermal decomposition onset temperature and activation energy of the overloaded XLPE insulation materials were reduced by approximately 15 K and 20 kJ mol−1, respectively, and its reaction mechanism function changed from D-ZLT3 to A2 (0 < α < 0.5). The FTIR shows that the major spectral components produced during the pyrolysis of the XLPE insulation material are C-H stretching, H2O, CO2, C-H scissor vibrations, and C=O and C=C stretching. Additionally, the four functional groups in the PE chains produced the spectral components in the following decreasing order of wavenumber: C–H stretching > CO2 > C–H scissor vibration > C=O and C=C stretching.

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Section: Ftir Analysismentioning

confidence: 98%

Section: Ftir Analysismentioning

confidence: 99%

Effects of Overload on Thermal Decomposition Kinetics of Cross-Linked Polyethylene Copper Wires

Jia,

Man,

Guo

et al. 2023

Polymers

Self Cite

View full text Add to dashboard Cite

show abstract

Thermo‐oxidative degradation behavior of poly(vinyl chloride) insulation for new and overloaded wires via TG‐FTIR

Lin,

Li,

Deng

et al. 2024

J of Applied Polymer Sci

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When a poly(vinyl chloride) (PVC) wire experiences overload failure, the internal structure of the insulation changes to become overloaded insulation and the fire hazard changes. In this study, the thermo‐oxidative degradation behavior of new and overloaded PVC insulation materials was analyzed using coupled thermogravimetric‐Fourier transform infrared spectroscopy (TG‐FTIR). The thermo‐oxidative degradation results show that the first two stages of thermo‐oxidative degradation of PVC insulation are important stages for measuring fire hazard. In addition, the onset temperature of thermo‐oxidative degradation of overloaded PVC insulation was increased. The activation energies of the first two stages of the overloaded PVC insulation increased by 7.7% and 27.0%, respectively, compared to the new PVC insulation. And the reaction mechanism is changed. The FTIR results indicate that the increased amount of volatile organic compounds and CO2 generated during the pyrolysis of the overloaded PVC insulation may result in the generation of more heat and smoke during combustion, thus increasing the fire hazard.

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Thermal decomposition kinetics of poly(vinyl chloride) insulation for overloaded and non-overloaded wires

Man,

Lin,

et al. 2024

J Therm Anal Calorim

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Effect of overload current values on the fire characteristics of polyethylene (PE) copper wires

Cited by 4 publications

References 26 publications

Effects of Overload on Thermal Decomposition Kinetics of Cross-Linked Polyethylene Copper Wires

Effects of Overload on Thermal Decomposition Kinetics of Cross-Linked Polyethylene Copper Wires

Thermo‐oxidative degradation behavior of poly(vinyl chloride) insulation for new and overloaded wires via TG‐FTIR

Thermal decomposition kinetics of poly(vinyl chloride) insulation for overloaded and non-overloaded wires

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