ESR spectroscopy as a new method to analyze the synergy between two different nanofillers dispersed in an elastomer matrix

descriptionPublicationkeyboard_double_arrow_right Article 01 Feb 2019 Croatia English Publisher:Elsevier BVJournal:Polymer Testing, volume 73, pages 293-299 (issn: 0142-9418,

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Authors: Aleksandra Ivanoska-Dacikj; Gordana Bogoeva-Gaceva; Srećko Valić;

doi: 10.1016/j.polymertesting.2018.11.044

ESR spectroscopy as a new method to analyze the synergy between two different nanofillers dispersed in an elastomer matrix

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Abstract

In this study electron spin resonance (ESR) investigations on hybrid natural rubber based nanocomposites loaded with 2 phr of multi-walled carbon nanotubes (MWCNT) and various concentrations of expanded organically modified montmorillonite (EOMt) (0 ; 8 and 16 phr) were reported. The temperature dependence of the resonance line parameters in the range 160–353 K was analyzed. From the obtained results it was evident that the presence of the EOMt influences the appearance of the ESR spectra. This influence makes it possible to assess the state of dispersion of the hybrid nanofiller in the rubber matrix only by analyzing the line shape of the resonance ESR spectra. The Lorenzian line shape indicates good dispersion of the nanofillers while Dysonin line shape suggests re-agglomeration. The increase of the g-factor, or resonance line position values, when EOMt is present in the matrix suggests that the EOMt and MWCNT interact in such a way that the content of the defects in the multi-walled carbon nanotubes decreases.

Country

Croatia

Related Organizations

Macedonian Academy of Sciences and Arts
Former Yugoslav Republic of Macedonia
Saints Cyril and Methodius University of Skopje
Former Yugoslav Republic of Macedonia
University of Rijeka
Croatia
Ruđer Bošković Institute
Croatia

Keywords

Polymer-matrix composites (PMCs), TEHNIČKE ZNANOSTI. Kemijsko inženjerstvo., Electron spin resonance (ESR) spectroscopy, Carbon nanotubes, Nanoclays, PRIRODNE ZNANOSTI. Kemija., NATURAL SCIENCES. Chemistry., NATURAL SCIENCES. Physics., PRIRODNE ZNANOSTI. Fizika., TECHNICAL SCIENCES. Chemical Engineering., Nano composites, Electron spin resonance (ESR) spectroscopy ; Carbon nanotubes ; Nanoclays ; Nano composites ; Polymer-matrix composites (PMCs)

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