Author/Authors :
Karabulut, Orhan Pamukkale University - Faculty of Arts and Sciences - Department of Physics, Turkey , Tilki, Tahir Süleyman Demirel University - Faculty of Arts and Sciences - Department of Chemistry, Turkey , Yavuz, Mustafa Süleyman Demirel University - Faculty of Arts and Sciences - Department of Chemistry, Turkey , Kaplan, Abdullah Süleyman Demirel University - Faculty of Arts and Sciences - Department of Physics, Turkey , Takanoğlu, Duygu Pamukkale University - Faculty of Arts and Sciences - Department of Physics, Turkey , Çabuk, Mehmet Muş Alparslan University - Faculty of Arts and Sciences - Department of Chemistry, Turkey , Çabuk, Mehmet Süleyman Demirel University - Faculty of Arts and Sciences - Department of Chemistry, Turkey , Doğan, Seda Süleyman Demirel University - Faculty of Arts and Sciences - Department of Chemistry, Turkey
Abstract :
In the present study, polypyrrole/bentonite (PPy/Bnt) composite was synthesized into the Bnt interlayers by chemical oxidation polymerization. The irradiation process was carried out in air in a conventional gamma chamber, which uses a 60Co source, and the composite was exposed to a dose of 40 kGy. Effects of irradiation on the composite were investigated by means of FTIR, UV-visible absorption, TGA, XRD, SEM and temperature dependent electrical conductivity in the temperature range of 290-410 K. The initial decomposition temperature of pristine PPy/Bnt composite was found higher than irradiated PPy/Bnt composite. The XRD patterns revealed that the intensity of the peaks changed with irradiation. It was found from temperature dependent conductivity measurements that the radiation significantly influenced the conductivity of PPy/Bnt composite. The conductivity results show that dominant conduction mechanisms were hopping for both PPy/Bnt composite and irradiated samples due to wide range of localized states present near the Fermi level.
NaturalLanguageKeyword :
Polypyrrole , bentonite , conducting composite , gamma irradiation
