Journal ArticleDOI
Synthesis and Characterization of Conductive Blends of Polyaniline with Poly(azomethine ester)s
Reads0
Chats0
TLDR
In this paper, Fourier Transform Infra-Red (FT-IR) and thermo gravimetric analysis (TGA) were used to determine the electrical conductivities of PANI in the temperature range 32°C to 80°C.Abstract:
Polyaniline (PANI) doped with HCl was blended with different poly(azomethine ester)s (10% by weight of PANI) and compressed into pellets. The blends were studied by Fourier Transform Infra-Red (FT-IR) and thermo gravimetric analysis (TGA). Electrical conductivities of the blends determined by four-point probe method, in the temperature range 32°C to 80°C, vary from 24.4 × 10−3 to 3.15 × 10−3 Scm−1. The TGA measurements show that weight loss occurred below 80°C is only about 2%.read more
Citations
More filters
Journal ArticleDOI
Synthesis and characterization of new poly(azomethine ester)s having phenylthiourea units
TL;DR: In this article, a dihydroxy monomer N-(4-hydroxy-3methoxybenzal) N′-(4′-hydroxyphenyl)thiourea was condensed with six diacid chlorides.
Journal ArticleDOI
Novel processable and heat resistant poly(phenylthiourea azomethine imide)s: Synthesis and characterization
TL;DR: The structural explication of monomers and poly(phenylthiourea azomethine imide)s were carried out by FTIR, 1 H and 13 C NMR techniques along with crystallinity, organosolubility, inherent viscosity and molecular weight measurements as mentioned in this paper.
Journal ArticleDOI
Synthesis, Characterization and Metal Ion Adsorption Studies on Novel Aromatic Poly(Azomethine Amide)s Containing Thiourea Groups
Lingam Ravikumar,S.S. Kalaivani,T. Vidhyadevi,Arukkani Murugasen,Selvaraj Dinesh Kirupha,Subramanian Sivanesan +5 more
Abstract: A series of novel ladder-type poly(azomethine amide)s (PAMs) were
prepared from new azomethine containing carboxylic acid monomer (TCA) with
simple aromatic diamines and aromatic diamines with thiourea groups (TDAs) by means of
phosphorylation polycondensation reaction. Molecular weights of the polyamides
were evaluated viscometrically, and the inherent viscosities were in the range of 0.31 - 0.58 g/dl. These
ladder-type polymers were not freely soluble in common organic solvents.
Structure of monomers and polymers were confirmed using FT-IR, 1H-NMR
and 13C-NMR spectroscopic analysis. Removal of Cu2+ and
Cd2+ from aqueous solutions by adsorption onto the polyamides was
investigated. The effect of pH, initial metal ion concentrations and contact
time were studied in batch experiments. The polyamides were found to be highly
effective adsorbents for the removal of Cu2+ and Cd2+ metal ions from aqueous solutions. In a mixture of metal
ions, the selectivity order was found to be Pb(II) > Cu(II)
> Cr(IV) > Cd(II).
Journal ArticleDOI
Synthesis, characterization and electrical conductivity of new poly (azomethine ester)s from hydroxy acids
Lingam Ravikumar,M. Balaji Prasad,B. Joy Vasanthi,K. Gopalakrishnan,J. Rajeshkumar,V. Sengodan +5 more
TL;DR: In this paper, two new poly esters were synthesized by direct polycondensation of 4′-hydroxybenzalaniline-4-carboxylic acid (4-CARB) using dichlorophenylphosphine at 140°C in DMF solvent containing LiCl.
Journal ArticleDOI
Ferrocene-Based Aliphatic and Aromatic Poly(azomethine)esters: Synthesis, Physicochemical Studies, and Biological Evaluation
TL;DR: In this article, a series of biologically significant poly(azomethine)esters (fe-PAME) were synthesized by the reaction of preformed (E)-4-((4-hydroxyphenylimino)methyl)phenol (SB) with 1,1-di(chlorocarboxyl)ferrocene, (PFe).
References
More filters
Journal ArticleDOI
Resistance of Polyaniline Films as a Function of Electrochemical Potential and the Fabrication of Polyaniline-Based Microelectronic Devices.
TL;DR: In this article, anodic growth of polyaniline films on a Au microelectrode array has been carried out to add to the characterization of polyanoiline and to fabricate polyanoin-based microelectronic devices, diodes and transistors, that function when the polyanoine-functionalized microelectron array is immersed in an electrolyte solution.
Journal ArticleDOI
Vibrational Spectra and Structure of Polyaniline
Journal ArticleDOI
Mittheilungen aus dem Universitätslaboratorium in Pisa: Eine neue Reihe organischer Basen
Journal ArticleDOI
Structure and Properties of Poly(acrylic acid)-Doped Polyaniline
Show-An Chen,Hsun-Tsing Lee +1 more
Abstract: The structure and properties of poly(acrylic acid) (PAA)-doped polyaniline (PAn) (or termed PAA/PAn blend) were investigated by X-ray diffraction, dynamic mechanical analysis, conductivity measurement, UV-visible-near-IR spectroscopy, IR spectroscopy, and atomic force microscopy. The PAA-doped PAn subchains can not align in an ordered fashion as can those of HCl-doped PAn. Therefore, the PAA/PAn blends are amorphous. The blend exhibits a T g higher than that of a PAn film plasticized with the same amount of 1-methyl-2-pyrrolidone (NMP), because the doped PAn subchains are more rigid and contain less NMP nearby. During the glass transition, some of the protonated N atoms of PAn are deprotonated due to the increased thermal motion of PAA-doped PAn subchains or, thermodynamically, decreased miscibility between PAA and PAn on heating; the protons generated can combine with the counterions, COO - , to become COOH. Thus partial undoping of PAn occurs and the conductivity of the blend (2.9×10 -4 S/cm for the composition of the mole ratio 1/1) drops at temperatures higher than T g . When the blend is cooled to room temperature, some of the undoped PAn subchains are redoped. For the PAA-doped PAn film, the confinement of carboxylic acid groups on the flexible polymer chains of PAA leads to a nonuniform and inefficient doping, such that some of the acid groups are unable to participate in the the doping and PAA is mainly distributed in the region where PAA-doped PAn subchains aggregate; and the undoped PAn forms another phase, though the acid/base interaction promotes the miscibility between PAA and PAn
Journal ArticleDOI
X-ray photoelectron spectroscopy study of electrically conducting polyaniline/polyimide blends
Moon Gyu Han,Seung Soon Im +1 more
TL;DR: In this article, the changes in protonation level ([N+]/[N] ratio), doping state, and conjugation condition for polyaniline-complexes/polyamic acid (PANI-complexe/PAA) blends and their thermally cured polyanile-complex/polyimide (Pani-complexs/PI) have been assessed by X-ray photoelectron spectroscopy and UV-Vis spectroscopic.
Related Papers (5)
Synthesis and characterization of new poly(azomethine ester)s having phenylthiourea units
Comparative studies of chemically synthesized polyaniline and poly(o-toluidine) doped with p-toluene sulphonic acid
Electrical and structural analysis of conductive polyaniline/polyimide blends
Moon Gyu Han,Seung Soon Im +1 more