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Copper diffusion in cable-insulating materials by chemiluminescence and DSC techniques

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An Erratum to this article was published on 13 February 2016

Abstract

Chemiluminescence (CL) and differential scanning calorimetry (DSC) were applied for proving the copper ion migration processes occurring within the low-density polyethylene (LDPE) electrical insulator as a consequence of intimate contact. Thin LDPE slides of 0.5 mm thick were subjected to short-time thermal stress at temperatures between 80 and 120 °C. Both CL and DSC kinetic parameters revealed the acceleration of post-treatment oxidation at elevated temperatures (170–200 °C) in copper-contacting polymer as in respect to the cases when Cu was absent. It was revealed that the oxidation rate measured by CL was more than two times higher for the samples heated in the presence of Cu than in its absence, while the oxidation induction time from DSC was considerably lowered for the same samples. Elemental analysis data provided by atomic absorption spectroscopy and particle-induced X-ray emission techniques as well as SEM investigations confirmed the presence of copper within the samples subjected to thermal treatment when the polymer insulation was in contact with the metallic conductor. Chemiluminescence procedure has a remarkable sensitivity to detect the effect of copper in the polymer matrix even at low concentrations.

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Acknowledgements

This work was financed by the Romanian Ministry of National Education—Executive Unit for Financing Higher Education, Research, Development and Innovation (MEN-UEFISCDI), through the PN II 2013 Partnerships Programme, project 282/2014, “High performance polymeric insulations for electrical rotation machines. Technology and modeling approaches.”

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Authors and Affiliations

  1. Faculty of Science and Arts, Valahia University of Târgovişte, Bd. Unirii 18-22, 130082, Târgovişte, Romania

    Silviu Jipa, Radu Setnescu, Tanta Setnescu & Laura Monica Gorghiu

  2. Department for Advanced Materials, National R&D Institute for Electrical Engineering (INCDIE ICPE-CA), Splaiul Unirii 313, Sector 3, 030138, Bucharest, Romania

    Radu Setnescu, Traian Zaharescu & Tanta Setnescu

  3. Multidisciplinary Research Institute for Science and Technologies (UVT-ICSTM), Valahia University of Târgovişte, Bd. Unirii 18-22, 130082, Târgovişte, Romania

    Iulian Băncuţă

  4. National R&D Institute for Physics and Engineering, Măgurele, Romania

    Elena Daniela Chelărescu

  5. Faculty of Physics - Doctoral School, University of Bucharest, Bucharest, Romania

    Elena Daniela Chelărescu

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  1. Silviu Jipa
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  2. Radu Setnescu
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  4. Tanta Setnescu
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  5. Laura Monica Gorghiu
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Correspondence to Radu Setnescu or Traian Zaharescu.

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Jipa, S., Setnescu, R., Zaharescu, T. et al. Copper diffusion in cable-insulating materials by chemiluminescence and DSC techniques. J Therm Anal Calorim 122, 251–259 (2015). https://doi.org/10.1007/s10973-015-4668-z

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  • DOI: https://doi.org/10.1007/s10973-015-4668-z

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