Electromagnetic, morphological and structural characterization of microwave absorbers based on POMA/magnetic filament composites

Pinto, Simone de Souza; Machado, João Paulo Barros; Gomes, Newton Adriano Santos; Rezende, Mirabel Cerqueira

doi:10.1016/j.jmmm.2017.09.073

Cited by 7 publications

(1 citation statement)

References 28 publications

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“…Poly(o-methoxyaniline) (POMA) is one kind of PANI derivatives and possesses a polar group (methoxy unit) attached to its main chain, which can form much stronger hydrogen bonding interaction among the carbonaceous fillers, ICP, and polymer matrix to promote the uniform dispersion of conductive filler into the polymer matrix. [42][43][44] Moreover, it has been reported that POMA and CNTs played a synergistic effect in conductivity, with incorporation 10 wt% of CNT into POMA, the conductivity of the hybrid conductive fillers POMA/CNT was improved by one order of magnitude. 45 Therefore, with good compatibility and synergistic effect of POMA and CNT, POMA and CNT would be an efficient combination to improve the conductivity of polymer composites.…”

Section: Introductionmentioning

confidence: 99%

Conductivity enhancement of poly(amide-imide) composites based on the synergistic effect of poly(o-methoxyaniline) and functionalized multiwalled carbon nanotube

Fang

Wang

et al. 2020

Polymers and Polymer Composites

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A series of novel ternary conductive composites have been prepared by incorporating functionalized multiwalled carbon nanotubes (FMWCNTs) into the binary composites of poly(amide-imide) (PAI) and poly( o-methoxyaniline) (POMA) to further improve the conductivity of PAI composites. With increasing the weight ratio of FMWCNTs, the conductivity of PAI/POMA/FMWCNTs ternary composites has been significantly enhanced from 10−3 S m−1 to 90 S m−1, much higher than that of the sum of PAI/POMA and PAI/FMWCNTs binary composites. The enhanced conductivity is mainly ascribed from a much more intensive conductive network formed in the PAI/POMA/FMWCNTs ternary composites. It is found that the N–H bending of amide group in the Fourier transform infrared spectrometry spectra is observed at 3298 cm−1 for PAI, 3296 cm−1 for PAI/POMA binary composites, and further blue shifted to 3292 cm−1 for PAI/POMA/FMWCNTs ternary composites. Moreover, the glass transition temperature has been increased from 82.5°C to 117.7°C. These results suggested that the hydrogen bonding interaction has been strengthened among PAI, POMA, and FMWCNTs, which is useful for dispersion of condcutive fillers into the polymer matrix.

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