scholarly journals Spectroscopy and Conductivity Studies of Polyvinyl Alcohol (PVA)/Polypyrrol (Ppy) Nanocomposite with Various Chloride Metals to Improved Properties of the Polymers

2019 ◽  
Vol 16 (1) ◽  
pp. 55-63
Author(s):  
Naglaa Shahin ◽  
Reham Kamal Abd El Hamid
Keyword(s):  
Polyvinyl Alcohol ◽  
Oxidative Polymerization ◽  
Conductivity Measurement ◽  
Charge Carriers ◽  
X Ray Diffraction ◽  
Chemical Oxidative Polymerization ◽  
Metal Chlorides ◽  
X Ray ◽  
Polymerization Method ◽  
Transition Electron

Polyvinyl alcohol- polypyrrole (PVA-PPy) nanocomposites with metal chlorides (FeCl3, NiCl2, CuCl2 and ZnCl2) have been synthesized by chemical oxidative polymerization method. These synthesized nanocomposites are characterized by using FTIR, X-ray diffraction, Transition electron microscope (TEM) and Conductivity measurement. TEM exhibit that all of the composites have uniform sizes and morphologies.  The diameter of PVA/PPy nanocompsite is 58nm when the metals added to the PVA/PPy the diameters becomes smaller. The variation of electrical conductivity (log ?) with 1000/T for PVA/PPy nanocomposite with metal chlorides revealed that the increase in conductivity s at temperature (393K) with added metals can be attributed to the creation of induced charge carriers in PVA/PPy matrix

Structural and Optical Study of Chemically Synthesized Polyaniline

2015 ◽  
Vol 7 (1) ◽  
Author(s):  
R. K. Shukla ◽  
Susheel Kumar Singh ◽  
Akhilesh Tripathi
Keyword(s):  
Fourier Transform ◽  
Oxidative Polymerization ◽  
Ultra Violet ◽  
Optical Study ◽  
X Ray Diffraction ◽  
Chemical Oxidative Polymerization ◽  
X Ray ◽  
Ft Ir ◽  
Polymerization Method ◽  
Scanning Electron

Polyaniline (PANI) is synthesized by chemical oxidative polymerization method. The, characterization were made using XRD (X-ray diffraction), FT-IR (Fourier transform spectroscopy), UV -vis (ultra-violet visible spectrophotometer) technique which confirms the synthesis of the Polyaniline. The surface morphology of Polyaniline was studied with scanning electron microscope (SEM).

Synthesis and Characterization Polyaniline/Cobalt Oxide Nanocomposite by Chemical Oxidation Method

2018 ◽  
Vol 1 (1) ◽  
pp. 9-20 ◽  
Author(s):  
M Haridevi ◽  
S Prabu ◽  
M Lakshmi Devi ◽  
E Bhakya Lakshmi ◽  
K Mohanraj ◽  
...  
Keyword(s):  
Cobalt Chloride ◽  
Uv Light ◽  
Low Cost ◽  
Oxidative Polymerization ◽  
Chemical Oxidation ◽  
X Ray Diffraction ◽  
Chemical Oxidative Polymerization ◽  
Photo Degradation ◽  
X Ray ◽  
Polymerization Method

The Co3O4-PANI nanocomposites has been synthesized by chemical oxidative polymerization method using cobalt chloride. It is a simple and low cost method to prepare nanocomposite. The prepared samples were characterized by using Scanning Electron Microscope (SEM), X-ray diffraction (XRD) and Fourier Transform Spectroscopy (FTIR) to get surface morphology, idea of getting particles of nano sized range so that further characterization can be done, to study the net surface charge of the nanoparticles by Zeta potential, photoluminescence of synthesized nanocomposite and measure photocatalytic activity of the synthesized nanomaterials was successfully tested for photo degradation of dye under UV light were studied

Synthesis, Structural, Morphological and I-V Characteristics of Polyaniline-MgCl Composite

2022 ◽  
Vol 1048 ◽  
pp. 141-146
Author(s):  
Madihally Nagaraja ◽  
Geetha Thippeswamy ◽  
Sushma Prashanth ◽  
Jayadev Pattar ◽  
Mahesh Hampapatna Mahesh
Keyword(s):  
Structural Analysis ◽  
Oxidative Polymerization ◽  
X Ray Diffraction ◽  
X Ray ◽  
Sem Micrographs ◽  
Morphological Studies ◽  
Current Voltage ◽  
Amorphous Nature ◽  
Diffraction Patterns ◽  
Polymerization Method

Composite of polyaniline-MgCl has been synthesized using oxidative polymerization method. Synthesized samples were characterized for structural analysis using FTIR and XRD. Morphological studies were carried by SEM micrographs. Current-Voltage (I-V) properties are obtained through Kiethly source meter. FTIR spectrum of polyaniline-MgCl composite indicates all the characteristic peaks of polyaniline. X-ray diffraction patterns represented the amorphous nature of polyaniline-MgCl composite. SEM micrographs confirmed the presence of MgCl particles in polyaniline matrix. I-V characteristics have shown the ohmic type behavior of polyaniline and polyaniline-MgCl composite.

Preparation and Property of a Composite of PPy/MMT/PMMA

2013 ◽  
Vol 631-632 ◽  
pp. 150-153
Author(s):  
Ji Wei Cai ◽  
Hai Jun Niu ◽  
Xu Duo Bai
Keyword(s):  
Loss Function ◽  
Oxidative Polymerization ◽  
Dissipation Factor ◽  
X Ray Diffraction ◽  
X Ray ◽  
Structures And Properties ◽  
Key Factor ◽  
Ft Ir ◽  
The Relationship ◽  
Polymerization Method

Polypyrrole/montmorillonite (PPy/MMT) particles were synthesized using an oxidative polymerization method. Then the particles were added into polymethyl methacrylate (PMMA) as additives to prepare PPy/MMT/PMMA composite. The structures and properties of the composite were characterized by FT-IR, TGA, X-ray diffraction spectroscopy, and four–probe machine. The relationship between content of PPy/MMT and conductivity was analyzed. The result shows that the amount of PPy/MMT is a key factor for improving the conductivity of composite. Furthermore, dynamic mechanical (DM) properties of composite were studied. When the PPy/MMT content reach 0.2% of composite, the storage modulus, loss function modulus, dissipation factor get highest values.

scholarly journals Hybrid Organic-Inorganic Composite Materials for Application in Chemical Sensors

2009 ◽  
Vol 4 (2) ◽  
pp. 100-104
Author(s):  
Anca-Dana Bendrea ◽  
Ana-Maria Catargiu ◽  
Mircea Grigoras
Keyword(s):  
Chemical Sensors ◽  
Mesoporous Material ◽  
Oxidative Polymerization ◽  
Synthesis Process ◽  
X Ray Diffraction ◽  
Chemical Oxidative Polymerization ◽  
X Ray ◽  
Post Synthesis ◽  
Inorganic Composite ◽  
Scanning Electron

Mesoporous SBA-15/conducting polymers composites, type SBA- polithiophene, SBA-polyaniline, respectively were synthesized and their physical properties were investigated. Polymers molecules were synthesized by chemical oxidative polymerization inside the pores of the mesoporous material by a post-synthesis process. The obtained materials were characterized by X-ray diffraction, scanning electron microscopy, thermal analysis and infrared spectroscopy.

Synthesis and Properties of Conducting Polyaniline by Co-Doping with Sulfosalicylic Acid and Sulfate Acid

2010 ◽  
Vol 663-665 ◽  
pp. 481-485 ◽  
Author(s):  
Hui Huang ◽  
Zhong Cheng Guo ◽  
Ju Kang Li
Keyword(s):  
Fourier Transform ◽  
Oxidative Polymerization ◽  
X Ray Diffraction ◽  
Chemical Oxidative Polymerization ◽  
Sulfosalicylic Acid ◽  
X Ray ◽  
Co Doping ◽  
Doped Polyaniline ◽  
Fourier Transform Raman ◽  
Ft Raman

A chemical oxidative polymerization of aniline sulfosalicylic acid (ANISSA) and aniline sulfate acid (ANIH2SO4) was performed in an aqueous solution. A co-doped polyaniline (PANI) was thus obtained, a higher conductivity than the insoluble H2SO4-doped PANI compressed pellet, and much higher conductivity than that prepared from pure ANISSA. The PANI doped with SSA and H2SO4 was characterized using Fourier-transform infrared spectra (FTIR), Fourier-transform Raman spectra (FT-Raman), X-ray diffraction (XRD) and thermogravimetric analysis (TGA). The investigation reveals that SSA and H2SO4 as dopant not only enhances crystallinity of polyaniline but also stability of polyaniline.

scholarly journals Facial Synthesis and Characterization of Polypyrrole/zinc oxide (ZnO) Nanorode and Flower-like Shape Composites

2018 ◽  
Vol 34 (1) ◽  
Author(s):  
Sang Nguyen Xuan
Keyword(s):  
Zinc Oxide ◽  
Oxidative Polymerization ◽  
Polymer Nanocomposite ◽  
Synthesis And Characterization ◽  
Chemical Oxidative Polymerization ◽  
Sem Images ◽  
X Ray ◽  
Polymerization Method ◽  
Composite Samples

Polypyrrole (PPy) nanocomposites reinforced with zinc oxide (ZnO) nanorod and nano flower were fabricated by chemical oxidative polymerization method using an ammonium per-sulphate (APS, (NH4)2S2O8) as an oxidizing agent. The polymer nanocomposite were characterized by X-ray diffractometer (XRD), scanning electron microscopy (SEM), and Fourier transform infrared (FTIR). The results were compared with pure as-prepared PPy. The SEM images of the nanocomposites show homogeneous dispersion characteristics and different morphologies of ZnO structures such as rod and flower-like shapes.  In the FTIR spectra, composite samples showed characteristic peaks of PPy shifted to higher positions confirmed the interfacial interactions between ZnO and PPy matrix.

Thermal Degradation Behavior of Polyaniline in Polyaniline/Tunsten Carbide Composite

2012 ◽  
Vol 581-582 ◽  
pp. 719-722
Author(s):  
Hui Huang ◽  
Ren Chun Fu ◽  
Zhong Cheng Guo
Keyword(s):  
Thermal Treatment ◽  
Oxidative Polymerization ◽  
Chain Scission ◽  
Ammonium Persulfate ◽  
X Ray Diffraction ◽  
Chemical Oxidative Polymerization ◽  
X Ray ◽  
Thermal Degradation Behavior ◽  
Ft Ir ◽  
Ft Raman

Polyaniline/tungsten carbide (PANI/WC) composite was synthesized by chemical oxidative polymerization of aniline using ammonium persulfate as the oxidant and thermal treated in air at 150°C, 250°C, 350°C and 450°C to 2 hours. The changes of structure, crystalline and conductivity were investigated by Fourier Transformed Infrared (FT-IR), Fourier Transformed Raman (FT-Raman), X-Ray Diffraction (XRD) and four-probe technique. The results showed that PANI/WC composite showed much-improved thermal stability compared to pure PANI. But the conductivity of PANI/WC is reduced to some extent (1.73 S/cm, the conductivity is reduced by about 82%) after thermal treated at 250°C, and dropped by 6 orders of magnitude (3.25×10-6S/cm) at 350°C. This may be explained by that only a fraction of dopant losses during thermal treatment at 250°C, but after thermal treatment at 350°C, along with cross-linking, chain scission and oxygen, resulting in destruction of crystal structure, decrease of the emeraldine sequence.

Effects of Reaction Conditions on Microstructures and Properties of Polyaniline Nanofibers through Interfacial Polymerization

2013 ◽  
Vol 750-752 ◽  
pp. 293-296
Author(s):  
Fei Tian ◽  
Zong Yi Qin ◽  
Qian Wu ◽  
Na Liu ◽  
Ya Qing Lu
Keyword(s):  
Interfacial Polymerization ◽  
Oxidative Polymerization ◽  
X Ray Diffraction ◽  
Chemical Oxidative Polymerization ◽  
Reaction Conditions ◽  
X Ray ◽  
Polyaniline Nanofibers ◽  
Solvent Water ◽  
Pani Nanofibers ◽  
Ft Ir

Polyaniline (PANI) nanofibers were fabricated through chemical oxidative polymerization at various organic solvent/water interfaces. The products were characterized by scanning electron microscope (SEM), Fourier transform infrared spectroscopy (FT-IR), X-ray diffraction (XRD), and thermogravimetric analysis (TGA). It is found that the morphologies, microstructures and properties of PANI nanofibers depend not only on the nature of organic solvents but also the adding way of aniline monomers and oxidant.

Role of the Structure and Electronic Properties of Fe2O3-MoO3 Catalyst on the Dehydration of Isopropyl Alcohol

1993 ◽  
Vol 58 (7) ◽  
pp. 1591-1599 ◽  
Author(s):  
Abd El-Aziz A. Said
Keyword(s):  
Active Sites ◽  
Isopropyl Alcohol ◽  
Oxide Catalyst ◽  
Flow System ◽  
Charge Carriers ◽  
X Ray Diffraction ◽  
X Ray ◽  
Catalyst Composition ◽  
Surface Active

Molybdenum oxide catalyst doped or mixed with (1 - 50) mole % Fe3+ ions were prepared. The structure of the original samples and the samples calcined at 400 °C were characterized using DTA, X-ray diffraction and IR spectra. Measurements of the electrical conductivity of calcined samples with and without isopropyl alcohol revealed that the conductance increases on increasing the content of Fe3+ ions up to 50 mole %. The activation energies of charge carriers were determined in presence and absence of the alcohol. The catalytic dehydration of isopropyl alcohol was carried out at 250 °C using a flow system. The results obtained showed that the doped or mixed catalysts are active and selective towards propene formation. However, the catalyst containing 40 mole % Fe3+ ions exhibited the highest activity and selectivity. Correlations were attempted to the catalyst composition with their electronic and catalytic properties. Probable mechanism for the dehydration process is proposed in terms of surface active sites.

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