Shielding and dielectric properties of sulfonic acid‐doped π‐conjugated polymer in 8.2–12.4 GHz frequency range

Ohlan, Anil; Singh, Kuldeep; Dhawan, S. K.

doi:10.1002/app.30806

Cited by 9 publications

(3 citation statements)

References 55 publications

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“…This doping behavior supports the assumption that acid doping occurs in a way similar to oxidative doping, which involves oxidation of the backbone and formation of polarons or bipolarons . The dramatic increase in λ max upon treatment with acid parallels the behavior of polymer 2 and other conjugated polymers. , Figure illustrates the UV–vis spectra of neutral and doped p( t BuS-CO) 2 and 3 .…”

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confidence: 71%

Preparation and Characterization of Conjugated Polymers Made by Postpolymerization Reactions of Alternating Polyketones

et al. 2011

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Conjugated polymers possessing a poly(2,5-dimethylene-2,5-dihydrofuran) backbone were prepared through postpolymerization reaction of styrenic polyketones with bromine in one-pot reactions. The modification is proposed to proceed via condensation of two repeating units to form a fully characterized polymer with a poly(2,5-dimethylenetetrahydrofuran) backbone. Subsequent bromination and elimination of HBr yield a polymer with a fully conjugated carbon backbone. The new conjugated polymers were characterized by NMR, IR, and UV-vis spectroscopies and by CV. These polymers have strong absorption in the visible region, with the absorption peaks shifted to the NIR region upon doping with acids. The ease of the synthesis of the starting polyketone and of the modifications allows large-scale preparation of those conjugated polymers.

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confidence: 71%

Preparation and Characterization of Conjugated Polymers Made by Postpolymerization Reactions of Alternating Polyketones

et al. 2011

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“…Ohlan et al [76] prepared PAni doped with different contents of DBSA as dopant agent by microemulsion polymerization. Samples with a thickness of 2 mm were produced through compression moulding of the as-synthesized PAni.DBSA powder.…”

Section: The Effect Of Dopant On the Emi Se Of Icpmentioning

confidence: 99%

Conducting Polymeric Composites Based on Intrinsically Conducting Polymers as Electromagnetic Interference Shielding/Microwave Absorbing Materials—A Review

2021

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The development of sophisticated telecommunication equipment and other electro-electronic devices resulted in a kind of electromagnetic pollution that affects the performance of other equipment as well as the health of human beings. Intrinsically conducting polymers (ICP), mainly polyaniline and polypyrrole, have been considered as promising candidates for applications in efficient electromagnetic interference shielding (EMI) due to their ease of preparation, light weight, good conductivity and corrosion resistance. One of the important advantages of these materials is the capability to interact with the EM radiation through both absorption and reflection mechanisms thus enlarging the field of application. In this context, this review article describes a recent overview of the existing methods to produce intrinsically conducting polymers and their blends for electromagnetic shielding application. Additionally, it highlights the relationship between preparation methods reported in the literature with the structure and properties, such as electrical conductivity, electromagnetic shielding effectiveness (EMI SE), complex permittivity and permeability of these materials. Furthermore, a brief theory related to the electromagnetic mechanism and techniques for measuring the microwave absorbing properties are also discussed.

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“…EMI, a specific kind of environmental pollution, is drawing more attention recently, because of the explosive growth in the utilization of electrical and electronic devices in industrial, commercial, and military applications ( 133 ). Unfortunately, the EM wave emissions from one device could interfere with other devices, causing potential problems including a chronic disease such as damaging brain cells and DNA.…”

Section: Magnetic Properties and Applications Of Pincsmentioning

confidence: 99%

Nanocomposites of polymer and inorganic nanoparticles for optical and magnetic applications

et al. 2010

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This article provides an up-to-date review on nanocomposites composed of inorganic nanoparticles and the polymer matrix for optical and magnetic applications. Optical or magnetic characteristics can change upon the decrease of particle sizes to very small dimensions, which are, in general, of major interest in the area of nanocomposite materials. The use of inorganic nanoparticles into the polymer matrix can provide high-performance novel materials that find applications in many industrial fields. With this respect, frequently considered features are optical properties such as light absorption (UV and color), and the extent of light scattering or, in the case of metal particles, photoluminescence, dichroism, and so on, and magnetic properties such as superparamagnetism, electromagnetic wave absorption, and electromagnetic interference shielding. A general introduction, definition, and historical development of polymer–inorganic nanocomposites as well as a comprehensive review of synthetic techniques for polymer–inorganic nanocomposites will be given. Future possibilities for the development of nanocomposites for optical and magnetic applications are also introduced. It is expected that the use of new functional inorganic nano-fillers will lead to new polymer–inorganic nanocomposites with unique combinations of material properties. By careful selection of synthetic techniques and understanding/exploiting the unique physics of the polymeric nanocomposites in such materials, novel functional polymer–inorganic nanocomposites can be designed and fabricated for new interesting applications such as optoelectronic and magneto-optic applications.

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Shielding and dielectric properties of sulfonic acid‐doped π‐conjugated polymer in 8.2–12.4 GHz frequency range

Cited by 9 publications

References 55 publications

Preparation and Characterization of Conjugated Polymers Made by Postpolymerization Reactions of Alternating Polyketones

Preparation and Characterization of Conjugated Polymers Made by Postpolymerization Reactions of Alternating Polyketones

Conducting Polymeric Composites Based on Intrinsically Conducting Polymers as Electromagnetic Interference Shielding/Microwave Absorbing Materials—A Review

Nanocomposites of polymer and inorganic nanoparticles for optical and magnetic applications

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