Principles of Thermal Degradation

Wypych, George

doi:10.1016/b978-1-895198-85-0.50006-6

Cited by 16 publications

(9 citation statements)

References 354 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Compared to an inert atmosphere, the dehydrochlorination rate is higher in normal air [48]. At higher temperatures, chain scission and cross-linking reactions are also observed [49]. Since the low-frequency tan δ increased in all cases, an increase in conductivity can be assumed, indicating the thermal degradation of PVC core insulation.…”

Section: Cross Comparisonmentioning

confidence: 94%

“…Only the aluminum tape covered the belting layer in Sample 2, while Sample 3's belting layer could freely come into contact with air. Since the presence of oxygen increases the degradation of the PVC, it probably caused the different hardnesses of the samples after aging [48,49]. However, the softening of the PVC at the beginning of the thermal aging can also be caused by the annealing effect [51,52].…”

Section: Shore D Hardnessmentioning

confidence: 99%

See 1 more Smart Citation

Investigation of Structural Dependence of Cyclical Thermal Ageing of Low Voltage PVC Insulated Cables

Bal¹,

Tamus²

2023

Preprint

View full text Add to dashboard Cite

The widespread use of renewable energy sources has considerably expanded distributed generation. An unbalanced load on distribution cables may also result from the recent increase in novel appliances and electric vehicles, the reverse power flow may create short-term overloads. These transient overloads increase the temperature for a short time beyond the limit, which causes degradation. However, the temperature distribution on the cable is not even. Therefore, the cable components are not degraded evenly and similarly. This publication describes the change in electrical properties of low-voltage cables caused by short-term cyclic artificial ageing to track the impact of these brief temperature rises. This study examines how cable structure affects the dielectric characteristics of cable specimens. Four cable samples, each measuring 50 cm in length (SZAMKAM 0.6/1 kV 16 mm2× 4 manufactured by Prysmian MKM Kft, Hungary) put through an accelerated ageing test in a temperature-controlled oven after changing their structures by removing their layers. Three rounds, each of six hours, accelerated thermal ageing were applied. After each round of ageing, the dielectric parameter tanδ and capacitance were measured by Dirana Dielectric Response Analyzer in the laboratory at room temperature 24±0.5∘C. Furthermore, the polarization and depolarization currents were also studied. The results show that changing the cable structure impacts the dielectric parameters, especially the effect of belting layer is significant. From point of view of aging the PVC belting layer protects the diffusion of plasticizers of inner structure.

show abstract

Section: Cross Comparisonmentioning

confidence: 94%

Section: Shore D Hardnessmentioning

confidence: 99%

Investigation of Structural Dependence of Cyclical Thermal Ageing of Low Voltage PVC Insulated Cables

Bal¹,

Tamus²

2023

Preprint

View full text Add to dashboard Cite

show abstract

“…29 Although sparse, these defects are responsible for initiating autocatalytic thermal dehydrochlorination because of their weaker C–Cl bond strengths. 30 Though efforts to reduce the defect sites 31,32 and autocatalysis 33 are underway, some researchers have taken advantage of these more labile chlorine atoms in reactions ( vide infra ).…”

Section: Structure and Reactivitymentioning

confidence: 99%

Revisiting poly(vinyl chloride) reactivity in the context of chemical recycling

Jha,

Neyhouse,

Young

et al. 2024

Chem. Sci.

View full text Add to dashboard Cite

show abstract

“…[53] The second stage extending from 350 to 525 C corresponds to the cracking and decomposition of the HCl. [17,54,55] According to Trovati et al, [56] two steps of the thermal decomposition are observed for the PU sample: in the first step 36% mass loss occurs between 200 and 350 C and in the second step 62% of mass loss between 350 and 535 C. [8,[57][58][59] The prepared composites maintained the first thermal degradation at a similar temperature as the PU matrix. When comparing the initial degradation temperature of composites A1 (201.4 C), A2 (205.3 C), and A3 (226.2 C), there was an increase in the temperature necessary to start the loss of mass, which characterizes an increase in stability.…”

Section: Thermogravimetric Analysismentioning

confidence: 99%

Cemental composites with polyurethane and recycled polyvinyl chloride: The influence of industrial waste addition on flammability

et al. 2021

View full text Add to dashboard Cite

In the construction industry, the large number of residues presents a challenge for recycling and the possibility of producing new materials. This study reported the effects of the addition of polyvinyl chloride (PVC) residues and cement/alumina trihydrate on the production of a fire-resistant thermalacoustic insulation material. The composites were verified by scanning electron microscopy, the polyurethane (PU) cells were maintained with the addition of PVC, cement, and trihydrate alumina. The reduction in compressive strength for boards with 50% PVC waste as a replacement for the PU raw material. The boards showed the composites' conductivity coefficient was lower than that of the perforated brick and combustion deceleration up to flame extinction in the flammability test (UL94) because of the PVC/cement/ alumina trihydrate. They also presented cost savings (~57%) and carbon dioxide emissions (~49%) from the raw material, contributing to developing a less predatory and socio-environmentally responsible industry.

show abstract

Principles of Thermal Degradation

Cited by 16 publications

References 354 publications

Investigation of Structural Dependence of Cyclical Thermal Ageing of Low Voltage PVC Insulated Cables

Investigation of Structural Dependence of Cyclical Thermal Ageing of Low Voltage PVC Insulated Cables

Revisiting poly(vinyl chloride) reactivity in the context of chemical recycling

Cemental composites with polyurethane and recycled polyvinyl chloride: The influence of industrial waste addition on flammability

Contact Info

Product

Resources

About