Conjugated polymer nanocomposites: Synthesis, dielectric, and microwave absorption studies | Zendy

Anil Ohlan | Zendy; Kuldeep Singh | Zendy; Amita Chandra | Zendy; Vidya Nand Singh | Zendy; S. Dhawan | Zendy

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Conjugated polymer nanocomposites: Synthesis, dielectric, and microwave absorption studies

Author(s) -

Anil Ohlan,

Kuldeep Singh,

Amita Chandra,

Vidya Nand Singh,

S. Dhawan

Publication year - 2009

Publication title -

journal of applied physics

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 0.699

H-Index - 319

eISSN - 1089-7550

pISSN - 0021-8979

DOI - 10.1063/1.3200958

Subject(s) - materials science , nanocomposite , barium ferrite , polyaniline , microwave , polymer , dielectric , ferrite (magnet) , nanoparticle , chemical engineering , dielectric loss , absorption (acoustics) , permittivity , emulsion polymerization , high resolution transmission electron microscopy , transmission electron microscopy , polymerization , composite material , nanotechnology , optoelectronics , physics , quantum mechanics , engineering

Nanocomposites of polyaniline with barium ferrite and titanium dioxide (TiO2) are synthesized via in situ emulsion polymerization. The transmission electron microscopy (TEM) and high resolution TEM result shows the formation of array of nanoparticles encapsulated within the polymer chains during the synthesis process. The high value of microwave absorption, 58 dB (>99.999% attenuation) results from the combined effect of the nanoparticles and the polymer matrix. The amount of barium ferrite has the profound effect on permittivity (ε), permeability (μ), and microwave absorption of the nanocomposite. The contribution to the absorption value comes mainly due the magnetic losses (μ″) in barium ferrite and dielectric losses (ε″) in TiO2 and polyaniline

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