INVESTIGATION OF THE EFFECTS OF GRAPHITE-REINFORCED NITRILE BUTADIENE RUBBER (NBR) COMPOSITES ON THEIR ELECTRICAL PROPERTIES IN A WIDE VOLTAGE RANGE
10th INTERNATIONAL HALICH CONGRESS ON MULTIDISCIPLINARY SCIENTIFIC RESEARCH, İstanbul, Türkiye, 4 - 05 Mayıs 2026, ss.34-42, (Tam Metin Bildiri)
- Yayın Türü: Bildiri / Tam Metin Bildiri
- Basıldığı Şehir: İstanbul
- Basıldığı Ülke: Türkiye
- Sayfa Sayıları: ss.34-42
- Gazi Üniversitesi Adresli: Evet
Özet
The aim of this study is to investigate the effect of graphite reinforced on the electrical
properties of NBR. While electrically insulating rubber alone is not sufficient for advanced
electronic applications, its electrical properties can be improved by modifying it with suitable
additives thanks to its advantages such as high flexibility and ease of processing. For this
purpose, NBR composites were prepared in order of 10, 15, and 20 phr of graphite, to compare
their electrical conductivity properties with those of unreinforced NBR by using the currentvoltage
(I-V) measurements in wide voltage range of 0-10V at room temperature. NBR
composites were prepared using a two-roll mill method. In order to determine the effects of
doping ratio of graphite into NBR, unreinforced and 10, 15, 20 phr reinforced composites were
produced in same condition. The value of current increases with increasing voltage are almost
exponential. The I-V plots of these four NBR composites indicate that the value of AC
conductivity (sAC) increases significantly with both increasing applied bias voltage and the
added graphite ratio. Its value was changed between 1.81x10-8 for unfilled and 1.95x10-6 S/cm
for 20 phr reinforced graphite. The double logarithmic I-V plot shows two different linear parts
with different slopes which correspond to moderate and higher voltage for each sample. Their
slopes were found to be around 1 at intermediate voltages and around 2 at high voltages. This
indicates that the charge transport mechanism (CTM) in these composites occurs via Ohmic at
lower and space charge limited current (SCLC) at higher voltages. The results demonstrated
that the incorporation of graphite lead to significantly improved electrical properties of NBR.