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Investigating the effects of amine functionalized carbon balls in polybenzoxazine matrix

Abstract

This study contains arithmetical and experimental examination on the effects of adding carbon nano balls (CBs) on the curing behavior and material properties of the benzoxazine system. In this article, CBs were synthesized by a solvent method via the condensation of eugenol, ethylenediamine and formaldehyde based on the benzoxazine chemistry without the use of templates and surfactants. CBs were functionalized via amination. The final materials were characterized by different techniques, such as FTIR, Raman, SEM-EDX, XPS and nitrogen adsorption–desorption studies. Experimental results indicated that the materials showed higher surface area (133.4 m2g-1). Nanocomposites with amine functionalized carbon balls (CBs-NH2) were prepared from benzoxazine synthesized from vanillin, stearylamine and formaldehyde through condensation. We evidenced the formation of a polybenzoxazine structure by FTIR and NMR techniques. The curing behavior and material properties of the nanocomposites were studied widely. DSC thermogram showed exotherm corresponding to ring opening polymerization. Furthermore, by the incorporation of CBs-NH2 in polybenzoxazine system, the properties of the PBz/CBs-NH2 nanocomposites were improved significantly, as analysed through tensile strength, dynamic mechanical analysis, crosslink density, thermal stability and flame retardancy. The enhancement in the material properties is due to the strong interaction between the CBs-NH2 and PBz, resulting in the formation of well crosslinked polymer networks. The morphology and fracture surface of the nanocomposites were studied by scanning electron microscopy. The thermal and mechanical properties of the nanocomposites (PBz/CBs-NH2) are found to be outstanding when compared with the neat PBz. Keywords: Carbon balls, polybenzoxazine, functionalization, nanocomposites

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Supplementary files

Article information


Submitted
11 Feb 2020
Accepted
18 Jun 2020
First published
19 Jun 2020

New J. Chem., 2020, Accepted Manuscript
Article type
Paper

Investigating the effects of amine functionalized carbon balls in polybenzoxazine matrix

T. Periyasamy, S. Kim and S. P. Asraf, New J. Chem., 2020, Accepted Manuscript , DOI: 10.1039/D0NJ00698J

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