Journal ArticleDOI
Electromechanical behavior of polyaniline/poly (vinyl alcohol) blend films under static, dynamic and time-dependent strains
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TLDR
In this paper, a 3D variable range hopping (VRH) process is used to explain the experimentally observed electromechanical behavior of solution blended and HCl doped PANI/PVA blends subjected to uniaxial, static, dynamic and time-dependent tensile loading.Abstract:
We report on the experimentally observed electrical conductivity enhancement in polyaniline/poly (vinyl alcohol) blend films under uniaxial tensile loading. Polyaniline (PANI) is an intrinsically conducting polymer, which does not form stretchable free-standing films easily and hence its electromechanical characterization is a challenge. Blending of PANI with other insulating polymers is a good choice to overcome the processability problem. We report the electromechanical response of solution blended and HCl doped PANI/PVA blends subjected to uniaxial, static, dynamic and time-dependent tensile loading. The demonstrated viscoelastic and morphological contributions of the component polymers to the electrical conductivity behavior in these blends could lead to interesting applications in strain sensors and flexible electronics. The reversibility of the electromechanical response under dynamic strain is found to increase in blends with higher PANI content. Time-dependent conductivity studies during mechanical stress relaxation reveal that variations in the micro-domain ordering and the relative relaxation rate of the individual polymer phases can give rise to interesting electrical conductivity changes in PANI blends. From morphological and electrical conductivity studies, we show that PANI undergoes primary and secondary agglomeration behavior in these blends that contributes to the changes in conductivity behavior during the deformation. A 3D variable range hopping (VRH) process, which uses a deformable core and shell concept based on blend morphology analysis, is used to explain the experimentally observed electromechanical behavior.read more
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Book ChapterDOI
Polyaniline: Structure and Properties Relationship
TL;DR: In this paper, the effects of different parameters and reagents on PANI synthesis, structures, and applications have been discussed concisely, and the effect of PANI properties on synthesis, structure, and application has been discussed.
Journal ArticleDOI
Polyaniline-based multifunctional glass fiber reinforced conductive composite for strain monitoring
Sukanta Das,Tomohiro Yokozeki +1 more
TL;DR: In this article, a PANI-based conductive polymer matrix was employed to develop high conductive glass fiber reinforced conductive composite (GFRCP) for self-sensing capability.
Journal ArticleDOI
Strain induced insulator-to-conductor transition in conducting polymer composites from the auxetic behaviour of hierarchical microstructures.
TL;DR: An increase in conductivity and an associated insulator-to-conductor transition observed in certain conducting polymer composites below their percolation threshold under uniaxial tensile strain is reported, thereby shifting the percolations to lower volume fractions.
Journal Article
Polyvinyl Alcohol Processed Templated Polyaniline Films: Preparation, Characterization and Assessment of Tensile Strength
TL;DR: In this article, the effect of small molecule and polymers as templates on PANI was investigated and the results showed that PANIs have advantages of chemical stability and high conductivity making their commercial applications quite attractive.
References
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Journal ArticleDOI
Conducting polymer blends of polypyrrole with polyvinyl acetate, polystyrene, and polyvinyl chloride based toxic gas sensors
TL;DR: In this article, the response mechanism of the conducting polymer to a selection of gases and vapors was investigated using two techniques, measurement of conductance and mass changes using a four-point probe method, and a X-ray fluorescence (XRF) device, respectively.
Journal ArticleDOI
Stretching-Induced Growth of PEDOT-Rich Cores: A New Mechanism for Strain-Dependent Resistivity Change in PEDOT:PSS Films
Yoo-Yong Lee,Jihoon Lee,Ju-Young Cho,Na-Rae Kim,Dae-Hyun Nam,In-Suk Choi,Ki Tae Nam,Young-Chang Joo +7 more
TL;DR: In this paper, the authors show that the matching Poisson's ratio and elastic modulus between PEDOT:PSS films and their underlying substrates is important in decoupling the factors that affect the material's piezoresistivity, allowing for tunable resistivity.
Journal ArticleDOI
Blends of polypyrrole and poly(vinyl alcohol)
Hsing-Lin Wang,Jack E. Fernandez +1 more
Journal ArticleDOI
Doping dependent transport properties of polyaniline-CSA films
TL;DR: In this paper, the electrical conductivity of polyaniline films prepared via the camphorsulfonic acid (CSA)/m-cresol solution processing route have been synthesised with doping levels in the range 10 to 90 %.
Journal ArticleDOI
Wire-bar coating of semiconducting polythiophene / insulating polyethylene blend thin films for organic transistors.
TL;DR: In this paper, a wire-bar-coated organic blend thin films consisting of semiconducting poly(3-hexylthiophene) (P3HT) and insulating high-density polyethylene (HDPE) have been fabricated by novel application of a large area wirebar coating technique in air.