The Thermooxidation and Resistance to Moulds Action of Some Polyethylene Sorts Used at Anticorrosive Insulation of the Underground Pipelines

Bors, Adriana Mariana; Butoi, Nicoleta; Caramitu, Alina Ruxandra; Marinescu, Virgil; Lingvay, Iosif

Adriana Mariana Bors, Nicoleta Butoi, Alina Ruxandra Caramitu, Virgil Marinescu, Iosif Lingvay

The Thermooxidation and Resistance to Moulds Action of Some Polyethylene Sorts Used at Anticorrosive Insulation of the Underground Pipelines

Abstract:
Polyethylene (PE) insulations have a wide applicability in the insulation of both underground pipelines and underground power cables. In this context, by coupled techniques of thermal analysis (TG/DTG+DTA) and microbiological determinations, have been studied thermooxidability and resistance to moulds action of some polyethylene sorts. Following the processing of the experimental data obtained by thermal analysis it was found that during the applied heat treatment (100 oC), in the first approx. 380 h, there is a growth of LDPE (low density polyethylene) polymerization degree by elongation of the aliphatic chains, after which the predominant process consists in the structure crosslinking. For MDPE (mean density polyethylene) samples, during the thermal treatment applied, it was found that the crosslinking degree of polyethylene (PE) increased without significant molecular weight change (with all the related consequences of increasing the weight of the tertiary and quaternary carbon atoms in the molecule). Microbiological determinations have highlighted that the resistance to filamentous fungal action of LPDE is higher than that of the investigated MDPE. It was found that after heat treatment applied (1000 h & 100 oC), both at LDPE and at MDPE, decreases the resistance to moulds action is decreased. It has also been found that moulds action resistance is substantially decreased when inoculated culture media and PE samples are exposed to an alternative electric field of 50 Hz - 6 Vrms/cm.

Keywords:
PE insulation; underground pipelines; PE ageing; resistance to moulds

Issue: 2017 Volume 54, Issue 3

Pages: 447-452

Publication date: 2017/9/30

https://doi.org/10.37358/MP.17.3.4869

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This article is published under the Creative Commons Attribution 4.0 International License

Citation Styles

Cite this article as:
BORS, A.M., BUTOI, N., CARAMITU, A.R., MARINESCU, V., LINGVAY, I., The Thermooxidation and Resistance to Moulds Action of Some Polyethylene Sorts Used at Anticorrosive Insulation of the Underground Pipelines, Mater. Plast., 54(3), 2017, 447-452. https://doi.org/10.37358/MP.17.3.4869

Vancouver
Bors AM, Butoi N, Caramitu AR, Marinescu V, Lingvay I. The Thermooxidation and Resistance to Moulds Action of Some Polyethylene Sorts Used at Anticorrosive Insulation of the Underground Pipelines. Mater. Plast.[internet]. 2017 Jul;54(3):447-452. Available from: https://doi.org/10.37358/MP.17.3.4869

APA 6th edition
Bors, A.M., Butoi, N., Caramitu, A.R., Marinescu, V. & Lingvay, I. (2017). The Thermooxidation and Resistance to Moulds Action of Some Polyethylene Sorts Used at Anticorrosive Insulation of the Underground Pipelines. Materiale Plastice, 54(3), 447-452. https://doi.org/10.37358/MP.17.3.4869

Harvard
Bors, A.M., Butoi, N., Caramitu, A.R., Marinescu, V., Lingvay, I. (2017). 'The Thermooxidation and Resistance to Moulds Action of Some Polyethylene Sorts Used at Anticorrosive Insulation of the Underground Pipelines', Materiale Plastice, 54(3), pp. 447-452. https://doi.org/10.37358/MP.17.3.4869

IEEE
A.M. Bors, N. Butoi, A.R. Caramitu, V. Marinescu, I. Lingvay, "The Thermooxidation and Resistance to Moulds Action of Some Polyethylene Sorts Used at Anticorrosive Insulation of the Underground Pipelines". Materiale Plastice, vol. 54, no. 3, pp. 447-452, 2017. [online]. https://doi.org/10.37358/MP.17.3.4869

Text
Adriana Mariana Bors, Nicoleta Butoi, Alina Ruxandra Caramitu, Virgil Marinescu, Iosif Lingvay,
The Thermooxidation and Resistance to Moulds Action of Some Polyethylene Sorts Used at Anticorrosive Insulation of the Underground Pipelines,
Materiale Plastice,
Volume 54, Issue 3,
2017,
Pages 447-452,
ISSN 2668-8220,
https://doi.org/10.37358/MP.17.3.4869.
(https://revmaterialeplastice.ro/Articles.asp?ID=4869)
Keywords: PE insulation; underground pipelines; PE ageing; resistance to moulds

RIS
TY - JOUR
T1 - The Thermooxidation and Resistance to Moulds Action of Some Polyethylene Sorts Used at Anticorrosive Insulation of the Underground Pipelines
A1 - Bors, Adriana Mariana
A2 - Butoi, Nicoleta
A3 - Caramitu, Alina Ruxandra
A4 - Marinescu, Virgil
A5 - Lingvay, Iosif
JF - Materiale Plastice
JO - Mater. Plast.
PB - Materiale Plastice SRL
SN - 2668-8220
Y1 - 2017
VL - 54
IS - 3
SP - 447
EP - 452
UR - https://doi.org/10.37358/MP.17.3.4869
KW - PE insulation
KW - underground pipelines
KW - PE ageing
KW - resistance to moulds
ER -

BibTex
@article{MatPlast2017P447,
author = {Bors Adriana Mariana and Butoi Nicoleta and Caramitu Alina Ruxandra and Marinescu Virgil and Lingvay Iosif},
title = {The Thermooxidation and Resistance to Moulds Action of Some Polyethylene Sorts Used at Anticorrosive Insulation of the Underground Pipelines},
journal = {Materiale Plastice},
volume = {54},
number = {3},
pages = {447-452},
year = {2017},
issn = {2668-8220},
doi = {https://doi.org/10.37358/MP.17.3.4869},
url = {https://revmaterialeplastice.ro/Articles.asp?ID=4869}
}

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