writer：Junwei Gu, Shuang Xu, Qiang Zhuang, Yusheng Tang and Jie Kong*.
keywords：Polymeric composites, Hyperbranched polyborosilazane, Boron nitride, Dielectric property, Thermal conductivity
source：期刊
specific source：IEEE Transactions on Dielectrics and Electrical Insulation
Issue time：2017年

In this paper, we presented a new strategy for fabrication of polymeric composites combined with low dielectric loss and desirable thermal conductivity. With the incorporation of hyperbranched polyborosilazane (hb-PBSZ) into bisphenol A cyanate ester (BADCy) matrix, the modified hb-PBSZ/BADCy resin with 4 wt% hb-PBSZ possessed a low dielectric constant (ε) value of 2.37 and relatively low dielectric loss tangent value of 0.008 at 1MHz. Furthermore, by integrating micrometer boron nitride particles (mBN) into hb-PBSZ/BADCy matrix, the mBN/hb-PBSZ/BADCy composites presented relatively low ε of 3.09, desirable thermally conductive coefficient (λ of 0.63 W/(m?K)) and thermal diffusivity (α of 0.42 mm2/s) values. It provides an important perspective for designing dielectric and thermally conductive polymeric composites for electrical packaging and energy storage fields.