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

✍ Scribed by Sandeep Kumar; Brooks Lively; Tian Liu; Lili Sun; Annie Tangpong; Wei-Hong Zhong

Publisher
John Wiley and Sons
Year
2010
Tongue
English
Weight
714 KB
Volume
296
Category
Article
ISSN
1438-7492

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✦ Synopsis

Abstract

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. magnified image

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