Controllable regulation of the segregated conductive networks targeted enhanced thermal conduction performance of polymer bonded explosives

Abstract

Constructing continuous segregated conductive networks with highly thermally conductive fillers in polymer composites has been proved to be an effective way to increase the filler-filler contact and reduce the interfacial thermal resistance, which is quite helpful for the enhancement of the thermal conductivity. In this study, we have further optimized the thermal conduction performance of the composites through morphological control of the structure of segregated conductive networks. Our results reveal that the network continuity and density are the two main factors which will influence the thermal conductivity of the final polymer composites. Finally, the highest thermal conductivities of 1.221 and 1.421 W M-1 K−1 were achieved for the polymer composites at low filler content of 0.865 and 1.73 vol%, respectively, which are 74.9% and 103.6% higher than that of the corresponding pure polymer composites. Moreover, the mechanical properties of the composites were also preserved to some degree.