Thermomechanical Properties of Nanosilica Reinforced PEEK Composites

Research output: Journal Publications and Reviews (RGC: 21, 22, 62)21_Publication in refereed journalpeer-review

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Original languageEnglish
Pages (from-to)15-20
Journal / PublicationKey Engineering Materials
Online published15 Oct 2007
Publication statusPublished - 2007
Externally publishedYes


TitleThe 5th China Cross-strait Conference on Composite Materials
LocationShanghai Jiao Tong University
Period22 - 26 October 2006


The nano-sized silica particulates reinforced poly(ether ether ketone) (PEEK) composites were fabricated by means of simple compression molding technique. The nano-sized silica, measuring 30 nm in size, was firstly modified by surface-pretreatment with stearic acid. The thermomechanical properties of the resulting PEEK/SiO2 nanocomposites were measured using dynamic mechanical analysis (DMA) and thermal mechanical analysis (TMA). The TMA results show that the coefficient of thermal expansion (CTE) becomes lowered when the content of the nanosilica increases. Furthermore, the CTE of the modified-silica filled PEEK nanocomposites shows higher CTE values, as compared with those of the unmodified counterparts. The dynamic modulus of the PEEK nanocomposites shows over 40% increment at elevated temperatures from 100-250°C, indicating the apparent improvement of elevated temperature mechanical properties.

Research Area(s)

  • Nanocomposites, PEEK, Silica, Surface modification, Thermal properties