Thermal stability of polyaniline tosylate

Kulkarni, V. G.; Mathew, William R.; Weßling, B.; Merkle, Hans P.; Blaettner, S

doi:10.1016/0379-6779(91)91547-n

Cited by 67 publications

(8 citation statements)

References 2 publications

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“…It has also been reported [33][34][35][36][37] that the irreversible conductivity decay of thermally treated PANi at temperatures below the thermal decomposition has been attributed to changes in morphology, crosslinking, possible structural rearrangements or other chemical reactions such as chemical interactions between dopant or solvent with the polymer, and irreversible conversion of ionic chlorine to covalent chlorine. Crosslinking reactions and morphological changes may be responsible for decrease in the re-protonation after the thermal ageing.…”

Section: T Is the Conductivity Of Polymer After Thermal Treatment At mentioning

confidence: 99%

“…This originates in fewer imine N atoms being available for reprotonation. From TGA, IR spectroscopy and elemental analysis, it has been found that in air, oxidation and possible structural rearrangements lead to loss in conductivity (because of loss in conjugation, not dopant) at temperatures below thermal decomposition 34 . It was also noted that the structural integrity of doped PANi, as probed by infrared spectroscopy, was maintained during thermal ageing at temperatures at or below 200 o C 35 .…”

Section: Thermal Gravimetric Analysis (Tga)mentioning

confidence: 99%

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Polyaniline Conducting Electroactive Polymers Thermal and Environmental Stability Studies

Ansari

Keivani

2006

E-Journal of Chemistry

121

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Abstract:In the current studies, polyaniline (PANi) was prepared both chemical and electrochemically in the presence of different bronsted acids from aqueous solutions. The effect of thermal treatment on electrical conductivity, and thermal stability of the PANi conducting polymers were investigated using 4-point probe and TGA techniques respectively. It was found that polymer prepared by CV method is more thermally stable than those prepared by the other electrochemical techniques. In this paper we have also reviewed some fundamental information about synthesis, general properties, diverse applications, thermal and environmental stability of polyaniline conducting polymers.

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Section: T Is the Conductivity Of Polymer After Thermal Treatment At mentioning

confidence: 99%

Section: Thermal Gravimetric Analysis (Tga)mentioning

confidence: 99%

Polyaniline Conducting Electroactive Polymers Thermal and Environmental Stability Studies

Ansari

Keivani

2006

E-Journal of Chemistry

121

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“…On the basis of degradation at the temperature of 5% weight loss, the following order is observed: PANi‐MDSA > PANi‐BDSA > PANi‐HDSA ≈ PANi‐DDDSA. The 5% weight loss temperatures of PANi doped with H 2 SO 4 , methanesulfonic acid, CSA, DBSA, PTSA and DNNDSA have been reported at 235, 250, 200, 258, 285 and 203 °C, respectively …”

Section: Resultsmentioning

confidence: 99%

“…However, the problem with these dopants is the loss of acids at relatively low temperature and the insolubility of PANi. In order to overcome these problems and to improve the processing of PANi, bulky dopants such as camphorsulfonic acid (CSA), dodecylbenzenesulfonic acid (DBSA),, p‐toluenesulfonic acid (PTSA),, 2,7‐dinonylnaphthalene‐4,5‐disulfonic acid (DNNDSA), etc., have been investigated. The thermal stability of PANi doped with CSA, DBSA, PTSA and DNNDSA is 200, 258, 285 and 203 °C, respectively.…”

Section: Introductionmentioning

confidence: 99%

Polyaniline doped with α, ω‐alkanedisulfonic acids: preparation and characterization

Bharti

Jacob

Ghosh

2012

Polymer International

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The use of α, ω‐alkanedisulfonic acid, HO3S(CH2)nSO3H (n = 1, 4, 6 and 12), as a dopant for polyaniline (PANi) was investigated. This series of disulfonic acids with varying chain lengths were synthesized and used in the doping of PANi. The doped polymers showed conductivity in the range 10−2 to 10−1 S cm−1. Thermal studies showed that the doped polymers, depending on the chain length of α,ω‐alkanedisulfonic acid, were stable up to ca 300 °C and the thermal stability decreased with increasing dopant chain length. The thermal stability of α,ω‐alkanedisulfonic acid‐doped PANi was higher than that of alkanesulfonic acid‐doped PANi which typically degrades around 250 °C, suggesting a moderately broader processing window for α,ω‐alkanedisulfonic acid‐doped PANi for blending with other thermoplastics. Copyright © 2012 Society of Chemical Industry

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“…The longer heating time and higher temperature result in increase charging on the sample surface. The loss in conductivity was attributed to oxidation and deprotonation at N-atom of the pyrrole ring [25][26][27][28]. Some parts of the coating was found to be considerably damaged by heat treatment, which manifested as electrical charging on the fibre surface as seen in the SEM images in Fig.…”

Section: Thermostabilitymentioning

confidence: 93%

Polymerising pyrrole on polyester textiles and controlling the conductivity through coating thickness

Lin

Wang

et al. 2005

Thin Solid Films

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The surface resistance of polypyrrole (PPy)-coated polyester fabrics was investigated and related to coating thickness, which was controlled by adjusting the reactant concentrations. The thickness of the coating initially increased rapidly followed by a steady increase when the concentration of pyrrole (Py) was larger than a concentration of approximately 0.4 mg/ml. The surface resistance decreased from 10 6 to 10 3 V with increase in pyrrole concentration within 0.2 mg/ml until the concentration reached a value of about 0.4 mg/ml, above which the rate of decrease diminished. The effect of initial treatment with monomer or oxidant prior to polymerisation reaction with regards to thickness and surface resistance was minimal. The immersion time of the textile into the monomer solution prior to polymerisation reaction did not have a significant effect on the abrasion resistance. D

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Thermal stability of polyaniline tosylate

Cited by 67 publications

References 2 publications

Polyaniline Conducting Electroactive Polymers Thermal and Environmental Stability Studies

Polyaniline Conducting Electroactive Polymers Thermal and Environmental Stability Studies

Polyaniline doped with α, ω‐alkanedisulfonic acids: preparation and characterization

Polymerising pyrrole on polyester textiles and controlling the conductivity through coating thickness

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