Dramatic Effects of Scalable SNN-Assisted Melt Dispersion on Thermal Conductivity and Coefficient of Thermal Expansion of Nanocomposites

作者：Kumar Sandeep; Lively Brooks; Liu Tian; Sun Lili; Tangpong Annie; Zhong Wei Hong^*

来源：Macromolecular Materials and Engineering, 2011, 296(2): 151-158.

DOI：10.1002/mame.201000262

• linear coefficient of thermal expansion
• nanocomposites
• processing
• solid nano nectar
• thermal conductivity

It is demonstrated that SNN-assisted melt dispersion can lead to a significant improvement of the thermal conductivity of PC/MWCNT composites accompanied by a dramatic reduction in their linear CTE. The thermal conductivity of the SNN-containing composites after the 2-step process was about 95% higher than that of neat PC and 25% higher than that from 1-step processing at same loading. The CTE below the glass-transition temperature of composites with a 1.0 wt.-% MWCNT loading is substantially reduced compared to the neat polymer. A reduction in the CTE of up to 60.8% is observed for composites from the 2-step process. Simultaneous achievement of high thermal conductivity and low CTE is required for electronic packaging in microelectronics for device protection.

• 出版日期2011-2-14