Fig. 4. (a) In-plane thermal conductivity of the hBN/SEBS composite films with various hBN loadings. (b) Thermal conductivity of the 95 wt% hBN/SEBS composite film and that of other hBN-filled composites reported in previous work. (c) Out-of-plane thermal conductivity of hBN/SEBS composite films with various hBN loadings. (d) Temperature dependence of thermal conductivity of the 95 wt% hBN/SEBS composite film. (e) Thermal conductivity as a function of temperature in 95 wt% hBN/SEBS composite film for three heating cycles. (f) TGA curves of hBN, SEBS and hBN/SEBS composite films with various loadings.