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The effects of multi-walled carbon nanotube additives with different functionalities on the properties of polycarbonate/poly (lactic acid) blend

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Abstract

The effects of multi-walled carbon nanotubes (MWCNTs) with different functional groups on the properties of the polycarbonate (PC)/poly (lactic acid) (PLA) was investigated. Non-functionalized (MWCNT), hydroxyl-functionalized (MWCNT-OH), carboxyl-functionalized (MWCNT-COOH), and polycarbonate-grafted multi-walled carbon nanotube (PC-g-MWCNT) were selected as nano-additives for PC/PLA. PC-g-MWCNT were prepared by reacting between the hydroxyl groups on MWCNT-OH and the carbonyl groups in PC by the reactive extrusion. Fourier transformed infrared spectroscopy (FTIR) analysis was performed to support the functionalization process and determined the chemical structure of the modified nanotube. MWCNTs were compounded with PC/PLA in a twin-screw micro compounder and moulded with the laboratory-scale injection moulding machine. Nano-additives was added to the polymer matrix at 3–5 wt.% loading levels. Characterization of the prepared samples was realized by the thermal, mechanical, electrical conductivity, and morphological analysis. As a result of FTIR analysis, nanotubes were seen to bind successfully to the PC. The best effect at onset decomposition temperatures was achieved by increasing about 39.8 °C with the addition of 5 wt.% MWCNT-OH to the PC/PLA. The highest elongation at break, tensile strength, and modulus was obtained for nanocomposites containing MWCNT-COOH. The selective localization of PC-g-MWCNT in the matrix provided the highest electrical conductivity in 5 wt.% PC-g-MWCNT added nanocomposite.

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Acknowledgement

This study was supported by the Scientific Research Center of Kocaeli University. (KOU-BAP) (Project No: 2018/090 and 2019/038).

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  1. Chemical Engineering Department, Kocaeli University, Izmit, Kocaeli, Turkey

    Gizem Urtekin & Ayse Aytac

  2. Polymer Science and Technology Department, Kocaeli University, Izmit, Kocaeli, Turkey

    Ayse Aytac

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  1. Gizem Urtekin
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  2. Ayse Aytac
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Correspondence to Ayse Aytac.

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Urtekin, G., Aytac, A. The effects of multi-walled carbon nanotube additives with different functionalities on the properties of polycarbonate/poly (lactic acid) blend. J Polym Res 28, 180 (2021). https://doi.org/10.1007/s10965-021-02539-5

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