Recurrence Plot Analysis of Unsatured Polyester Samples Subjected to Contamination

Year 2018, Volume: 18 Issue: 1, 13 - 18, 23.02.2018

Aysel Ersoy Yılmaz Mehmet Murat İspirli

Abstract

Polymer materials that
are used in outdoor enviroments are exposed to humidity and polution. In
addition, some insulation materials installed in water or embeded to slush
containing serious pollutants for a long time. These conditions adversely
affect the dielectric properties of insulating materials. In this study, the
prepared unsaturated polyester (UPE) samples are stored in an ionized water
solution for 8, 24, and 168 hours. This ionized water solution is considered to
represent the polluted water in the outdoor environments. Further, the
dielectric behaviors of the prepared polyester samples are investigated using
the inclined plane test (IPT) method, whereas the leakage current data that are
recorded during the experiment are analyzed using the recurrence plot (RP)
method. The results of applying the inclined plane test on the unsaturated
polyester samples depict that the lifetime of the samples decreased with an
increase in the period of storage in the ionized water solution. Further, the
results of the recurrence plot analysis reveal that the recurrence plot point
density also depicted a decrease with an increase in the period of storage in
the ionized water solution.

Keywords

Inclined plane test, surface tracking, recurrence plot analysis, tracking failure

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