Electrically Conductive Composite of Polypyrrole and Liquid Crystalline Aromatic Copolyamide

1992 ◽  
Vol 247 ◽  
Author(s):  
Jing-Sheng Bao ◽  
C. C. Xu ◽  
W. Cai ◽  
Xian-Tong Bi
Keyword(s):  
Mechanical Properties ◽  
Liquid Crystalline ◽  
Diphenyl Ether ◽  
Composite Films ◽  
Electrically Conductive ◽  
Electrochemical Preparation ◽  
Conductive Composite ◽  
Order Of Magnitude ◽  
Conductive Composite Film ◽  
Electrically Conductive Composite

ABSTRACTThe modification of the mechanical properties of polypyrrole(PPy) by electrochemical preparation of conductive composite film from pyrrole(Py) and two kinds of liquid crystalline copolyamide of poly(p-phenylene-terephthal- amide)(PPTA) poly(p-phenyleneterephthalamide/diphenyl ether terephthal- amide) (PPTA[0]) and poly(p-phenyleneterephthalamide/diphenyl methane tere-phthalamide) (PPTA[C]) are presented.The electrical conductivity of the PPTA[0]/PPy and PPTA[C]/PPy composites are the same order of magnitude as PPy or PPTA/PPy. The mechanical properties of the composite films are better than that of pure PPy. and the composite films have good electroactivlty and thermalstability.

scholarly journals Development of Electrically Conductive Nanocrystalline Thin Film for Optoelectronic Applications

2013 ◽  
Vol 15 ◽  
pp. 90-101 ◽  
Author(s):  
Sujan Kumar Das ◽  
Jahid M.M. Islam ◽  
Monirul Hasan ◽  
Humayun Kabir ◽  
Md Abdul Gafur ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Tensile Strength ◽  
Electrical Properties ◽  
Composite Films ◽  
Young Modulus ◽  
Electrically Conductive ◽  
Elongation At Break ◽  
Ohmic Behavior ◽  
Nanocrystalline Thin Film ◽  
Electrically Conductive Composite

Sodium alginate (TiO2) sand composites were prepared by solution casting. Purified sand was added in the composite films to increase electrical conductivity. Electrical properties such as conductivity, capacitance, dielectric constant, and loss tangent of the composites were investigated. The current voltage characteristics for all the composites showed ohmic behavior. All the electrical properties have been found to improve with the incorporation of sand (SiO2) but 6% sand containing composite exhibits the best electrical properties. The mechanical properties tensile strength (TS), elongation at break (Eb) and Young modulus for 6% sand containing composite film are found to be 4.445 MPa, 9.76%, and 72.8 MPa respectively. The experimental results reveal that the blended films exhibit higher stability and improved mechanical properties of both tensile strength and elongation at break in dry state. Water absorption properties of the composites are found to decrease with the increase of sand content. Lowest water uptake properties and highest stability were demonstrated by 6% sand containing sample. Electrically conductive composite films have useful applications for solar cells and optoelectronics. Thus, this study is very much expected to aid in the design and selection of proper composite for the potential application of solar cell and optoelectronics.

scholarly journals Direct grafting-from of PEDOT from a photoreactive Zr-based MOF – a novel route to electrically conductive composite materials

2019 ◽  
Vol 55 (23) ◽  
pp. 3367-3370 ◽  
Author(s):  
Alexander Mohmeyer ◽  
Andreas Schaate ◽  
Bastian Hoppe ◽  
Hendrik A. Schulze ◽  
Thea Heinemeyer ◽  
...  
Keyword(s):  
Composite Materials ◽  
Electrically Conductive ◽  
Conductive Composite ◽  
Conductive Material ◽  
Grafting From ◽  
Photochemical Modification ◽  
Electrically Conductive Composite

Photochemical modification of Zr-bzpdc-MOF with PEDOT through direct polymerization of EDOT at the MOF surface gives an electrically conductive material.

A conductive composite film by permeation method

1999 ◽  
Vol 600 ◽  
Author(s):  
Jin Wei Wang ◽  
M. P. Srinivasan
Keyword(s):  
Electron Microscopy ◽  
Composite Films ◽  
Iodine Vapor ◽  
Polyamic Acid ◽  
Conductive Composite ◽  
Dimethyl Acetamide ◽  
Guest Species ◽  
Conductive Composite Film ◽  
Solvent Systems ◽  
Scanning Electron

AbstractA new method of making conductive composite films by permeation of the conducting guest species into the host is reported. A layer of poly(3-n-dodecyl thiophene) (P3ddt) is embedded at the surface of polyimide by permeation of the monomer or polymer (in solution in tetrahydrofuran or chloroform) into a solution of polyamic acid in n-methyl pyrrolidinone or dimethyl acetamide. The resulting composites were imidised and polymerized (if necessary). Chemical imidisation yielded composite -films that retained the conducting polymer even when the composite was subjected to solvent extraction. The films were conductive upon doping with iodine and recovered conductivity when they were exposed to iodine vapor subsequent to thermal de-doping. Thermogravimetry showed that the amount of thiophene incorporated into the polyimide was higher for permeation of the polymer than that of the monomer; however, the amount of p3ddt incorporated by the latter method was still higher than the amount that could be incorporated by blending polyamic acid with p3ddt. The levels of conductivity and speed of recovery for doped films were also higher for the permeated films. Results of scanning electron microscopy suggested that the higher mobility afforded by contact in the liquid state have contributed greater entanglement between the constituents leading to higher thermal and solvent resistance of the conducting constituent. The permeation method could be adopted to form composite films in solvent systems that are not completely miscible.

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