PSI - Issue 5

L. ALEXANDRESCU et al. / Procedia Structural Integrity 5 (2017) 675–682 Laurentia Alexandrescu / Structural Integrity Procedia 00 (2017) 000 – 000

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- Oxidation of graphite nanoparticle surface in order to activate it is a method of improving wettability and chemical bonding of graphite/polymer matrix. - Polyamide and oxidized graphite were mechanically mixed in a Brabender Plasti-Corder PLE-360 at 10-120 rotations/min, for 2 min. at 230 0 C to melt the plastomer, mixed for 3 min. at 240 0 C and 2 min. at 200 0 C for homogenisation. - The nanocomposites polyamide/oxidized graphite were characterized by scanning electron microscopy (SEM) and Fourier transformation infrared spectrum (FT-IR) and physico-mechanical. - Graphene oxide concentrations higher than 1% lead to decreases in shock resistance values and tensile strength values. This leads to the conclusion that percentages in the 0.1-1% range lead to maximum values of physical mechanical parameters.

Acknowledgements This research was financed through PN-III-P2-2.1-PTE-2016, project: “ New nanostructured polymeric composites for centre pivot liners, centre plate and other components for the railway industry - RONERANANOSTRUCT ” supported by UEFISCDI Romania.

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