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Synthesis and characterization of poly iodine anilines by plasma; Sintesis y caracterizacion de poliyodoanilinas por plasma

Abstract

The polymers and organic materials present a numberless quantity of applications. However, it has not been but until recent times that it has been found that some of these materials can possess semiconductor properties. This has generated a great interest for the investigation in the area of semiconductor polymers. The poly aniline (Pan) it is one of the main semiconductor polymers because their electric properties change depending on the doping and of the state of oxidation to the one the molecules are subjected. The synthesis of this material has been carried out by means of chemical oxidation or electrochemistry. In this work a study is presented on the formation of poly aniline polymers with halogens chemically united to the aniline ring, poly(m-iodine aniline) (m-PAnI) and poly(m-chloroaniline) (m-PAnCI) for plasma. The plasma is generated by means of discharges of splendor with an r f amplifier to 13.5 MHz to drops pressures (10{sup -2} mbar). The synthesized polymers were obtained in form of thin film in the walls of the reactor and in the substrate introduced in the one. The electric properties of the polymers were evaluated in function of the time of reaction. Also, the conductivity of the polymers was compared  More>>
Authors:
Publication Date:
Jul 01, 2003
Product Type:
Thesis/Dissertation
Report Number:
INIS-MX-1398
Resource Relation:
Other Information: TH: Thesis (Chemist); PBD: [2003]
Subject:
37 INORGANIC, ORGANIC, PHYSICAL AND ANALYTICAL CHEMISTRY; ABSORPTION SPECTROSCOPY; ANILINE; BENZENE; CHLORINE; DIAGRAMS; ELECTRIC CONDUCTIVITY; FILMS; IMAGES; IODINE; MORPHOLOGY; PLASMA; POLYCYCLIC AROMATIC AMINES; POLYMERIZATION; POLYMERS; SAMPLING; SCANNING ELECTRON MICROSCOPY; SPECTRA; SPECTROSCOPY; SYNTHESIS; THERMAL GRAVIMETRIC ANALYSIS; TIME DEPENDENCE; X-RAY DIFFRACTION
OSTI ID:
20478169
Research Organizations:
Universidad Autonoma del Estado de Mexico, Toluca (Mexico)
Country of Origin:
Mexico
Language:
Spanish
Other Identifying Numbers:
TRN: MX0400103052282
Availability:
Available from INIS in electronic form
Submitting Site:
MXN
Size:
81 pages
Announcement Date:

Citation Formats

Enriquez P, M A. Synthesis and characterization of poly iodine anilines by plasma; Sintesis y caracterizacion de poliyodoanilinas por plasma. Mexico: N. p., 2003. Web.
Enriquez P, M A. Synthesis and characterization of poly iodine anilines by plasma; Sintesis y caracterizacion de poliyodoanilinas por plasma. Mexico.
Enriquez P, M A. 2003. "Synthesis and characterization of poly iodine anilines by plasma; Sintesis y caracterizacion de poliyodoanilinas por plasma." Mexico.
@misc{etde_20478169,
title = {Synthesis and characterization of poly iodine anilines by plasma; Sintesis y caracterizacion de poliyodoanilinas por plasma}
author = {Enriquez P, M A}
abstractNote = {The polymers and organic materials present a numberless quantity of applications. However, it has not been but until recent times that it has been found that some of these materials can possess semiconductor properties. This has generated a great interest for the investigation in the area of semiconductor polymers. The poly aniline (Pan) it is one of the main semiconductor polymers because their electric properties change depending on the doping and of the state of oxidation to the one the molecules are subjected. The synthesis of this material has been carried out by means of chemical oxidation or electrochemistry. In this work a study is presented on the formation of poly aniline polymers with halogens chemically united to the aniline ring, poly(m-iodine aniline) (m-PAnI) and poly(m-chloroaniline) (m-PAnCI) for plasma. The plasma is generated by means of discharges of splendor with an r f amplifier to 13.5 MHz to drops pressures (10{sup -2} mbar). The synthesized polymers were obtained in form of thin film in the walls of the reactor and in the substrate introduced in the one. The electric properties of the polymers were evaluated in function of the time of reaction. Also, the conductivity of the polymers was compared synthesized in this work with reported data of synthesized poly aniline and doped with iodine for plasma. The highest values in conductivity are obtained in the poly aniline where the halogens are chemically connected to the ring that if it is doped with iodine. The atomic proportion in the surface of the polymers was analyzed by dispersive energy spectroscopy with which is deduced that the halogens come off of the molecules of the monomers or of the polymer in formation and that the atoms of iodine get lost more easily than those of chlorine. Other techniques that were used to characterize to the poly aniline were scanning electron microscopy, infrared spectroscopy, thermal gravimetric analysis and X-ray diffraction. The results are presented in function of the time of reaction that is one of the variables that there is shown to be very significant to promote inter crossing and ramification in the materials synthesized by plasma. The content of this thesis work is presented in six chapters: in the Chapter 1 the generalities of the polymers are described as their classification and the different polymerization techniques, as well as some concepts on the plasma, polymerization for plasma and like it is generated. In the Chapter 2 the importance is described that has the poly aniline like semiconductor material in its pure form and doped. Also the mechanism of electric conduction that is carried out in the polymers is discussed. The Chapter 3 narrate the theoretical foundation of the analytic techniques that were used to characterize to the synthesized polymers. Also, the experimental arrangement is explained that was used in the measurement of the electric conductivity of the polymers. In the Chapter 4 the synthesis of the polymers is described which includes the m-iodine aniline synthesis and m-chloroaniline for plasma and the chemical conditions under which were carried out the syntheses. The results that they were obtained when characterizing the polymers for: measurement of thickness, scanning electron microscopy, infrared spectroscopy, X-ray diffraction, thermogravimetry and electric conductivity are presented in the Chapter 5 of this work. At the end the conclusions of this work are presented. (Author)}
place = {Mexico}
year = {2003}
month = {Jul}
}