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Carbon nanotube-filled polypropylene/polyethylene blends: compatibilization and electrical properties

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Abstract

The effects of carbon nanotubes (CNT) on the morphology, mechanical and electrical properties of immiscible polypropylene/polyethylene (PP/PE) blends were investigated. PP/PE (90/10) blend filled with up to 20 wt% CNT and PP/PE blends with different PP/PE volume ratios and constant CNT volume fraction were prepared by melt mixing. The morphology analysis showed that the nanotubes have higher affinity towards the PE phase. However, for the 90/10 PP/PE blend filled with 20 wt% CNT, some nanotubes were observed within the PP phase due to the saturation of the PE minor phase. The 90/10 PP/PE blend exhibited co-continuous morphology even at very low CNT content because of the low interfacial tension between PE and PP (γ PE-PP  = 0.8−1.2 mN/m). Remarkable enhancement in tensile strength was obtained with the increase in nanotubes concentration. The blend’s electrical percolation threshold concentration was found to be in the range of 1–1.5 wt% CNT, which is lower than that of the CNT/PE nanocomposite.

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Acknowledgments

This work was financially supported by the Scientific Research Support Fund, Ministry of Higher Education, Amman, Jordan (Grant Number Bas/2/05/2010).

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  1. Department of Chemical Engineering, Jordan University of Science and Technology, P.O. Box 3030, Irbid, 22110, Jordan

    Mohammed H. Al-Saleh

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  1. Mohammed H. Al-Saleh
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Correspondence to Mohammed H. Al-Saleh.

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Al-Saleh, M.H. Carbon nanotube-filled polypropylene/polyethylene blends: compatibilization and electrical properties. Polym. Bull. 73, 975–987 (2016). https://doi.org/10.1007/s00289-015-1530-1

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