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Abstract
This paper deals with the preparation and characterization of nanocomposites of poly(ether ether ketone) (PEEK) containing nano-aluminum oxide ( n-Al 2O 3) filler up to 30 wt% (12 vol%) loading. Nanocomposites showed improved thermal stability, crystallization, and coefficient of thermal expansion (CTE). Thermogravimetric analysis showed enhanced thermal stability and char yield on increasing the n-Al 2O 3 loading in PEEK matrix. The peak crystallization temperature is increased up to 13 °C for the nanocomposites as compared to pure PEEK. The CTE is decreased to a value very close to the CTE of copper at 12 vol% Al 2O 3 loading. The CTE values obtained were compared with the theoretical equations in the literature. The X-ray diffraction showed that PEEK crystalline structure is unchanged with addition of n-Al 2O 3. The distribution of n-Al 2O 3 in the PEEK matrix was studied by transmission electron microscopy and scanning electron microscopy. The results show that the prepared n-Al 2O 3/PEEK nanocomposites may have potential applications in electronics.
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