International Journal of Latest Research in Engineering and Technology (IJLRET) ISSN: 2454-5031 www.ijlret.com || Volume 06 - Issue 09 || September 2020 || PP. 38-42 www.ijlret.com 38 | Page Electrical Conductivity of Conductive Polymer Polyaniline (PANI- ES) Preparation by Chemical Oxidative Method Amer N. Jarad Al-Daghman Department of Physics, Materials Science, Polymer Research Center, University of Basrah, Basrah, Iraq Abstract: Conductive polymer as Polyaniline (PANI-ES) prepared by chemical oxidation polymerization method at room temperature and studied the effect the dopant sulfuric acid on the structure of the polymer, which prepared with molarity of sulfuric acid (1M), the changes taking place were follow-up by the following measurements: FESEM, FT-IR, I-V character. The diagnosis of the output polymer films by using infrared spectroscopy FT-IR, for doped samples with 1M of sulfuric acid observed change in the intensity of emission opposite the wave number corresponding to each bond, while not noticed any change in the position of the bonds with appearance anew peak return to SO 4 compound. By the FESEM properties of the surface study using the topography FESEM (Field Emission Scanning Electronic Microscopic) and calculated the particle revealed, that the compound has micro granular affected with the presence of acid. Electrical characteristic study by using the two-probe manner, it found that the samples had ohmic plots in which high linear coefficients. The doped samples of polymer had a highest conductivity of 2.98x10 -4 S.cm -1 at 383 K, which observed for the H 2 SO 4 doped sample, which shows that was more prominent of localized salt in polymer. Keywords: Electrical Conductivity, Acidic doped, PANi-ES. I. INTRODUCTION Electrically conducting polymers described as a new class of synthetic materials [1] reached a high interest in the last years, confirmed by the Nobel Prize 2000 in chemistry for the discovery and development of conductive polymers [2]. Polyaniline is one of the most studied materials because of its high conductivity upon doping with acids, good behavior physic-chemical and easy fabrication under reproducible conditions by electro-chemical polymerization and chemically oxidation of aniline, and good environmental stability [3]. A key property of a conductive polymer is the presence of conjugated double bonds along the backbone of the polymer. In conjugation, the bonds between the carbon atoms are rotating single and double. Every bond contains a localized bond as strong chemical bond. In addition, every double bond also contains a localized bond as weaker bond. However, conjugation is not enough to make the polymer material conductive, [4] charge carriers in the form of extra electrons or holes have to inject into the material. Polyaniline acts as an electrically conductive material only in the protonation form of emeraldine salt. It can changes the electronic conductivity about (10) orders of magnitude, passing from insulator state (emeraldine base) to metallic conduction (emeraldine salt), depending upon the protonation degree [4, 5]. Controlling the doping state and polymerization conditions, we assume that is possible to change the morphology and thus the chemical properties of polymer [6]. In the emeraldine salt (ES), the HSO 4 species are ionic bonded with the -NH groups presented in the polymer chain. Actually, these kinds of bonds are very weak and can removed very easy by changing the system pH [6]. By requirement doping of polyaniline in sulfuric acid media, actually we introduced multiple charge carriers, which determine an improvement of the electrical conduction along the polymer chain. Moreover, we assume that the total conduction in PANI given by summing the electrical conduction and ionic conduction that occurs by sulfonic groups on the aromatic rings [6]. II. METHODOLOGY: Synthesis of Conductive Polyaniline PANI-ES The PANI-ES samples were chemical prepared at the ambient conditions at room temperature by using reagent aniline, ammonium peroxide sulfate (APS), and the appropriate dopant (H 2 SO 4 ). The standard procedure for the polymerization of aniline hydrochloride was followed [7]. A 0.25 M solution of APS was mixed with 1 M of aniline and in 1M of the acid dopant. Both solutions are mixed in a round bottomed flask and gentle stirring to polymerize the mixture. The mixture was stirred and maintained at -4°C in presence ice bath. The temperature as a function of time for this reaction was recorded through the polymerization processes. The green precipitate formed was filtered, washed with distilled water and acetone, and then dried in oven vacuum for 6 h at 80°C. The Polyaniline powder was thoroughly in a mortar to obtain very fine particles.