Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
7221301 | Materials & Design (1980-2015) | 2013 | 9 Pages |
Abstract
A facile strategy with the advantages of low cost and ease of mass production was presented to prepare low-density polyethylene (LDPE)/low-temperature expandable graphite (LTEG) composites with relatively high thermal conductivity by an in situ expansion melt blending process. LTEGs were expanded and delaminated into graphite multi-layers and graphite nanoplatelets during processing which synergistically created more thermo-conducting paths in the composites and hence led to great improvements in thermal conductivity. Thermal conductivity of the composite with 60Â wt% of LTEG loading was increased by 23 times as compared to the pure LDPE, increasing from 0.47 to 11.28Â W/mK. The incorporation of LTEG decreased the melting temperature and the degree of crystallinity of LDPE. Percolation threshold of both the electrical conductivity and rheological measurements was observed at about 8Â vol% of LTEG loading. Moreover, the LDPE/LTEG composites showed better thermal stability compared to the pure LDPE.
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Authors
Hejun Wu, Canhui Lu, Wei Zhang, Xinxing Zhang,