scholarly journals Investigation of Dc-Conductivity and Morphology of PMMA/PANI Composite

2021 ◽  
Vol 3 (2) ◽  
pp. 49-53
Author(s):  
Panigrahi M.K
Keyword(s):  
Electron Microscopy ◽  
Room Temperature ◽  
In Situ Polymerization ◽  
Dc Conductivity ◽  
Inorganic Acid ◽  
Temperature Dependent ◽  
Pani Composite ◽  
Pmma Polymer ◽  
Scanning Electron

Various inorganic acid doped PMMA/PANI composite are prepared by in-situ polymerization technique. Morphology, room temperature (RT) conductivity and DC-conductivity with temperature variation (77-300 K) are analyzed by scanning electron microscopy (SEM) and linear four probe technique, respectively. Fibril structures with different diameter are observed in doped PMMA/PANI composite, whereas smooth texture is found in PMMA polymer film. Room temperature DC conductivity is found 0.1497 × 10-2 S/cm for H2SO4-and 0.309 × 10-3 S/cm for H3PO4-, 0.244 × 10-3S/cm for HCl-doped conductive composite, respectively. Temperature dependent DC Conductivity is measured and it behaves like semiconductor.

Morphology of Polyethylene/Montmorillonite Nanocomposites Prepared by In Situ Polymerization

2013 ◽  
Vol 457-458 ◽  
pp. 244-247
Author(s):  
Min Li ◽  
Li Guang Xiao ◽  
Hong Kai Zhao
Keyword(s):  
Electron Microscopy ◽  
Scanning Electron Microscopy ◽  
In Situ Polymerization ◽  
X Ray Diffraction ◽  
X Ray ◽  
Transmission Electron ◽  
Reflection Peak ◽  
Basal Reflection ◽  
Scanning Electron

Polyethylene/montmorillonite (PE/MMT) nanocomposites were prepared by in situ polymerization. The morphology of MMT/MgCl2/TiCl4 catalyst and PE/MMT nanocomposites was investigated by scanning electron microscopy (SEM). It can be seen that MMT/MgCl2/TiCl4 catalyst remained the original MMT sheet structures and many holes were found in MMT and the morphology of PE/MMT nanocomposites is part of the sheet in the form of existence, as most of the petal structure. X-ray diffraction (XRD) and transmission electron microscopy (TEM) were carried out to characterize all the samples. XRD results reveal that the original basal reflection peak of PEI1 and PEI2 disappears completely and that of PEI3 become very weak. MMT/MgCl2/TiCl4 catalyst was finely dispersed in the PE matrix. Instead of being individually dispersed, most layers were found in thin stacks comprising several swollen layers.

Preparation of Polyaniline @ Polypyrrole Conductive Composite via In Situ Polymerization

2013 ◽  
Vol 562-565 ◽  
pp. 1137-1142
Author(s):  
Hui Xia Feng ◽  
Bing Wang ◽  
Lin Tan ◽  
Na Li Chen
Keyword(s):  
Electron Microscopy ◽  
Electrical Conductivity ◽  
Scanning Electron Microscopy ◽  
Fourier Transform ◽  
In Situ Polymerization ◽  
Conductive Composite ◽  
The Core ◽  
Novel Method ◽  
Scanning Electron

We prepared the polyaniline@polypyrrole (PAn@PPy) conductive composite by a novel method. The struction like Pre-prepared PAn as the core and PPy as the shell for the composite has been prepared by in-situ polymerization. The PAn@PPy conductive composite presents an electrical conductivity of 12.5 S/cm, which is much higher than pure PAn. The synthesized polymer composites are characterized by Fourier Transform Infrared Spectroscopy (FTIR), Scanning Electron Microscopy (SEM) and Thermogravimetric analysis (TG). The results indicated that PPy successfully grafted on PAn and the heat resistance of nanocomposite is remarkably increased.

scholarly journals Polyaniline-deposited cellulose fiber composite prepared via in situ polymerization: enhancing adsorption properties for removal of meloxicam from aqueous media

RSC Advances ◽  
2017 ◽  
Vol 7 (21) ◽  
pp. 12639-12649 ◽  
Author(s):  
Flávia Viana Avelar Dutra ◽  
Bruna Carneiro Pires ◽  
Tienne Aparecida Nascimento ◽  
Valdir Mano ◽  
Keyller Bastos Borges
Keyword(s):  
Electron Microscopy ◽  
Scanning Electron Microscopy ◽  
Infrared Spectroscopy ◽  
In Situ Polymerization ◽  
Fiber Composite ◽  
Aqueous Media ◽  
Cellulose Fiber ◽  
Adsorption Properties ◽  
Scanning Electron

Polyaniline (PAni), cellulose fiber (CF) and a PAni–CF composite, which were characterized by infrared spectroscopy, scanning electron microscopy and thermogravimetry, were investigated in adsorption studies of meloxicam (MLX) from aqueous media.

SYNTHESIS AND DC CONDUCTIVITY OF PALLADIUM POLYACRYLATE

1993 ◽  
Vol 07 (08) ◽  
pp. 1697-1710
Author(s):  
PARVEEN AKHTAR ◽  
M. PASHA ◽  
FARID A. KHWAJA
Keyword(s):  
Electron Microscopy ◽  
Electrical Conductivity ◽  
Room Temperature ◽  
Dc Conductivity ◽  
Heat Treated ◽  
Insulator Metal Transition ◽  
Structural Details ◽  
Exponential Decrease ◽  
Before And After ◽  
Scanning Electron

This papers reports the synthesis and the results of the measurements of dc conductivity of heat treated palladium polyacrylate. Infrared spectra and the scanning electron microscopy of the samples before and after heat treatments are compared in order to reveal their structural details. It is conjectured that at T>38° C molecular aggregates are formed or ion pairing takes place in the material due to the breakdown of the polymer chain in it. The semiconductor-like behavior of the electrical conductivity with the increase of temperature from room temperature to 38°C and thereafter, an exponential decrease in conductivity with further increase in temperature exhibiting a metal-like behaviour show that the material undergoes an insulator-metal transition at this temperature.

scholarly journals Microstructures of Three In-Situ Reinforcements and the Effect on the Tensile Strengths of an Al-Si-Cu-Mg-Ni Alloy

2018 ◽  
Vol 8 (9) ◽  
pp. 1523 ◽  
Author(s):  
Lusha Tian ◽  
Yongchun Guo ◽  
Jianping Li ◽  
Feng Xia ◽  
Minxian Liang ◽  
...  
Keyword(s):  
Electron Microscopy ◽  
Room Temperature ◽  
X Ray Diffraction ◽  
Simultaneous Formation ◽  
X Ray ◽  
Transmission Electron ◽  
Ni Alloy ◽  
Al3ti Phase ◽  
Scanning Electron

In the present paper, the microstructures of three kinds of in-situ reinforcements Al-Ti-C, Al-Ti-B, and Al-Ti-B-C-Ce were deeply investigated using a combination of scanning electron microscopy, X-ray diffraction spectroscopy, and transmission electron microscopy. The effect of in-situ reinforcements on the room temperature and elevated temperature (350 °C) tensile strengths of Al-13Si-4Cu-1Mg-2Ni alloy were analyzed. It is found that doping with trace amounts of B and Ce, the size of the Al3Ti phase in the in-situ reinforced alloy changed from 80 µm (un-reinforced) to about 10 µm, with the simultaneous formation of the AlTiCe phase. The Al-Ti-B-C-Ce reinforcement which is rapid solidified, was more effective and superior to enhance the tensile strengths of the Al-13Si-4Cu-1Mg-2Ni alloy, both at room and high temperatures than those of addition other reinforcements. The room temperature (RT) strength increased by 19.0%, and the 350 °C-strength increased by 18.4%.

scholarly journals Synthesis of Conductive Cocoon Silk Composites

2017 ◽  
Vol 25 (0) ◽  
pp. 17-22 ◽  
Author(s):  
Yuki Kaitsuka ◽  
Hiromasa Goto
Keyword(s):  
Electron Microscopy ◽  
Scanning Electron Microscopy ◽  
Electron Spin Resonance ◽  
Thermogravimetric Analysis ◽  
Esr Spectroscopy ◽  
Reaction Field ◽  
Pani Composite ◽  
Spin Resonance ◽  
Scanning Electron

Herein we report on the preparation of polyaniline (PANI) composite using a cocoon by in situ chemical oxidative polymerisation. The composites thus prepared were characterised by scanning electron microscopy (SEM), thermogravimetric analysis (TGA), infrared (IR), and electron spin resonance (ESR) spectroscopy. We confirmed the PANI/cocoon composite and subsequent carbonisation allowed the formation of micro-sized wafer-shaped carbon. The polymerisation reaction occurs in a chiral reaction field of the silk surface, which can be referred to as bio-interface polymerisation.

Preparation PET Hybrided Materials by In Situ Polymerization for Delustered Fibers

2017 ◽  
Vol 898 ◽  
pp. 2166-2173
Author(s):  
Mahgoub Osman Montaser ◽  
Jia Liang Zhou ◽  
Mohamed Nourrein ◽  
Chong Li ◽  
Heng Xue Xiang ◽  
...  
Keyword(s):  
Electron Microscopy ◽  
Mechanical Properties ◽  
Hybrid Materials ◽  
In Situ Polymerization ◽  
High Load ◽  
Scanning Calorimetry ◽  
Chemical Structures ◽  
Master Batch ◽  
Scanning Electron

A series of polyethylene terephthalate (PET) hybrid materials with high-load TiO2 content were prepared via in situ polymerization by dispersing unmodified titanium dioxide (TiO2) in Ethylene Glycol (EG), and the influence of load TiO2 nanofillers on the physical properties of PET masterbatch was investigated. The intrinsic viscosities of the prepared PET hybrid materials were affected by the addition of the nanoparticles and in both cases a slight decrease was observed. In addition, the thermal behavior of these PET hybrid materials and neat PET was investigated using Differential Scanning Calorimetry (DSC). The chemical structures of PET hybrid materials were characterized by Fourier Transform Infrared (FTIR) and Scanning Electron Microscopy (SEM). The TiO2 nanoparticles show well dispersibility in PET matrix. The PET hybrid material with 40wt.% TiO2 content was used as master batch to prepare full dull PET fiber with 2.5 wt.% TiO2. The melt flow ability of PET hybrid materials shows good winding and drawing performance, and also the resulted fiber has better mechanical properties than neat PET fiber. It suggests that this PET/TiO2 masterbatch by in situ polymerization may find good application for delustered fiber preparation.

Effect of Ti3SiC2 Content on Mechanical Properties of Ti5Si3-TiC-Ti3SiC2 Composites

2007 ◽  
Vol 336-338 ◽  
pp. 1383-1385 ◽  
Author(s):  
Chao Qin ◽  
Lian Jun Wang ◽  
Sheng Qiang Bai ◽  
Wan Jiang ◽  
Li Dong Chen
Keyword(s):  
Electron Microscopy ◽  
Mechanical Properties ◽  
Room Temperature ◽  
Bending Strength ◽  
Molar Ratio ◽  
Plasma Sintering ◽  
Spark Plasma ◽  
Scanning Electron ◽  
Properties Of Composites

Ti5Si3-TiC-Ti3SiC2 composites containing different Ti3SiC2 volume fractions from 0 to 50% were in-situ fabricated by spark plasma sintering using Ti and SiC powders through adjusting the molar ratio of Ti to SiC. The morphologies of the fracture surfaces were analyzed by scanning electron microscopy (SEM). The room temperature mechanical properties of composites including hardness, bending strength and fracture toughness were tested.

Preparation and Characterization of Thermally Expandable Microcapsules by In Situ Polymerization

2012 ◽  
Vol 496 ◽  
pp. 130-133
Author(s):  
Xue Bao Wang
Keyword(s):  
Electron Microscopy ◽  
Scanning Electron Microscopy ◽  
In Situ Polymerization ◽  
Particle Diameter ◽  
Ethyl Acrylate ◽  
Preparative Method ◽  
Scanning Electron ◽  
C Nmr

In the present work, we synthesized microcapsules with copolymer of acrylonitrile and ethyl acrylate as shell and isooctane as core by in situ polymerization, and then optimized the preparative method. Synthesized microcapsules were characterized by Fourier transform infrared spectroscopy (FTIR),13C nuclear magnetic resonance (13C-NMR), scanning electron microscopy (SEM), particle diameter analysis and thermogravimetry (TG).

In Situ Polymerization Approach to Magnesium Hydroxide-Reinforced PA6 Composites

2011 ◽  
Vol 399-401 ◽  
pp. 457-460
Author(s):  
Li Li Xu ◽  
Yu Hao Deng ◽  
Ye Wang ◽  
Chang Hua Liu ◽  
Sheng Peng Liu
Keyword(s):  
Electron Microscopy ◽  
Scanning Electron Microscopy ◽  
Tensile Strength ◽  
Magnesium Hydroxide ◽  
In Situ Polymerization ◽  
Polyamide 6 ◽  
Elongation At Break ◽  
Izod Impact ◽  
Scanning Electron

Polyamide 6 (PA6)/magnesium hydroxide (MH) nanoparticles composites have been prepared by in situ polymerization of ε-caprolactam in the presence of pristine MH and γ-aminopropyl-triethoxysilan ( KH550 ) grafted MHs (MMH). Compared with pure PA6, the tensile strength and elongation at break of PA6/MH and PA6/MMH composites shown obvious increasement and attain maximum at loading of 3 wt% MHs. The tensile strength and elongations at break of PA6/MMH composites exhibited notably enhancement contrast with that of PA6/MH composites. Comparing with PA6/MH composites, the izod impact strength of PA6/MMH composites were also improved. Scanning electron microscopy (SEM) shown that MMH particles were homogeneous dispersed in PA6 matrix due to the surface modification of grafting KH550.

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