【Composites Part A】Synergistic improvement of thermal conductivities of polyphenylene sulfide composites filled with boron nitride hybrid fillers
作者：Junwei Gu, Yongqiang Guo, Xutong Yang, Chaobo Liang, Wangchang Geng, Lin Tang, Qiuyu Zhang
關(guān)鍵字：Polymer-matrix composites,Thermal properties, Compression moulding
論文來源：期刊
具體來源：http://www.sciencedirect.com/science/article/pii/S1359835X17300416
發(fā)表時(shí)間：2017年
Hybrid fillers of micrometer boron nitride/nanometer boron nitride (mBN/nBN) were employed to fabricate the highly thermally conductive insulating mBN/nBN/polyphenylene sulfide ((mBN/nBN)/PPS) composites via mechanical ball-milling followed by hot-compression method. The thermally conductive coefficient (λ), dielectric constant (ε) & dielectric loss tangent (tan δ) values and thermal stabilities were all enhanced with the increasing addition of mBN/nBN hybrid fillers. The λ value was improved from 0.286 W/mK for pristine PPS matrix to 2.638 W/mK for the (mBN/nBN)/PPS composite with 60 wt%mBN/nBN (mass fraction, 2:1) hybrid fillers. Appropriate addition of the mBN/nBN hybrid fillers played a role of heterogeneous nucleation for PPS matrix. Agari model fitting revealed that the mBN/nBN hybrid fillers could be much easier to form the continuous thermally conductive channels & networks. The corresponding ε and tan δ values still maintained relatively lower level of 3.96 and 0.022, respectively. And the corresponding THeat-resistance index (THRI) value was beyond 277.8 °C.