Evaluation of electric, morphological and thermal properties of thermally conductive polymer composites

Research Center for Technologies in Space Materials Science

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Abstract

Natural graphite powder was introduced into a linear low density polyethylene (LLDPE) to improve the thermal conductivity. The thermal conductivity of LLDPE/graphite composites is increased by more than seventeen times with increase in filler content up to 30 vol.% as compared to that of LLDPE matrix. The percolation threshold for these composites is equal to 10 vol.%. LLDPE/graphite composites can be used as cost effective thermally dissipative materials for electrical engineering and electronic devices due to the high thermal conductivity and thermal diffusivity.

Original language	English
Pages (from-to)	875-882
Number of pages	8
Journal	Applied Thermal Engineering
Volume	91
DOIs	https://doi.org/10.1016/j.applthermaleng.2015.08.046
Publication status	Published - 5 Dec 2015

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Keywords

Heat sink
LED-lamp
Polymer/graphite composites
Thermal conductivity
Thermal diffusivity

ASJC Scopus subject areas

Energy Engineering and Power Technology
Industrial and Manufacturing Engineering

Cite this

Lebedev, S. M., & Gefle, O. S. (2015). Evaluation of electric, morphological and thermal properties of thermally conductive polymer composites. Applied Thermal Engineering, 91, 875-882. https://doi.org/10.1016/j.applthermaleng.2015.08.046

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AB - Natural graphite powder was introduced into a linear low density polyethylene (LLDPE) to improve the thermal conductivity. The thermal conductivity of LLDPE/graphite composites is increased by more than seventeen times with increase in filler content up to 30 vol.% as compared to that of LLDPE matrix. The percolation threshold for these composites is equal to 10 vol.%. LLDPE/graphite composites can be used as cost effective thermally dissipative materials for electrical engineering and electronic devices due to the high thermal conductivity and thermal diffusivity.

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KW - Thermal diffusivity

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Access to Document

10.1016/j.applthermaleng.2015.08.046