Journal
ADVANCED COMPOSITES AND HYBRID MATERIALS
Volume 5, Issue 2, Pages 1090-1099Publisher
SPRINGERNATURE
DOI: 10.1007/s42114-022-00438-x
Keywords
Hexagonal boron nitride; Thermal conductivity; Co-continuous phase; Phase interface
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In this study, a co-continuous composite structure was formed by controlling the percentage of polyethylene and polypropylene blend and incorporating hexagonal boron nitride. The thermal conductivity of the composites was significantly improved by wrapping h-BN with thermoplastic elastomer and achieving localized distribution at the interface.
In this work, the percentage of polyethylene (PE) and polypropylene (PP) blend is controlled at 50:50 to make the composite by forming a co-continuous structure with hexagonal boron nitride (h-BN). The h-BN is wrapped by thermoplastic elastomer styrene-ethylene-propylene-styrene (SEPS). This approach enables the localized distribution of h-BN at the interface of the co-continuous structure of PE/PP blend and SEPS phases, allowing the construction of a heat conduction path in the SEPS phase, thereby improving the thermal conductivity of PE/PP. Theoretical calculation predicted the localized distribution of SEPS at the interface of the PE/PP blend to form a co-continuous composite structure. The thermal conductivity of the composites can be improved by 57.7% by adding 10 wt% h-BN, presenting a commercial potential of such composites in certain heat dissipation applications.
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