Preperation and investigation of electrical properties of poly (2-aminophenol) and its composites


Thesis Type: Postgraduate

Institution Of The Thesis: Istanbul Technical University, Fen Bilimleri Enstitüsü, Polymer Science and Technology, Turkey

Approval Date: 2017

Thesis Language: English

Student: FATMA TUBA ÇOĞALMIŞ

Principal Consultant (For Co-Consultant Theses): Bahire Filiz Şenkal

Co-Consultant: Mustafa Okutan

Abstract:

Polyaniline and derivatives are important electronic materials because of its easy synthesis, environmental stability; reversible proton dopability, redox recyclability, cost-effectiveness, and reasonable electrical conductivity compare the other conducting polymers. These polymers are the most promising conducting materials for applications in optoelectronics and microelectronics devices. In this study, 2- aminophenol was polymerized oxidatively in the presence of different acids such as HBr, HCl, formic acid, boric acid, etc. as dopants and ammonium persulfate as initiator. The obtained polymers were characterized by using spectroscopic (FT-IR, UV-Vis spectrophotometer), electrically (dielectric measurements) and morphologically (SEM). In addition, 2-aminophenol was polymerized as insitu in the presence of different percentage of nanoclay, boron nitride (BN) and barium titanate to obtain polymer composite materials. These composites were characterized by using FT-IR, SEM and electrical measurements. The effects of the dopant on the course of oxidation and properties of final products have been studied by Fourier Transform Infrared Spectroscopy (FTIR) spectroscopy, and conductivity measurements. The dielectric properties of polymer and composites were investigated using the impedance spectroscopy (IS) dependency of the frequency. The formation of poly (2-aminophenol) composites with inorganic materials provides new synergistic properties that cannot be attained from individual materials. The combination of inorganic materials (clay, barium titanate, BN) and functional polymers interacting at atomic level constitutes the basis for the preparation of an important class of inorganic–organic structure materials. In this study, 2-aminophenol was polymerized oxidatively in the presence of formic acid as dopant and Nano clay barium titanate, BN with different weight percentage (1%, 2% and 5%). The electrical properties of the polymer composites were studied using impedance spectroscopy.