Preparation and properties of poly(ether ether ketone) composites reinforced by modified wollastonite grafting with different oligomers

Abstract

Different structure silane-terminated polymer oligomers were synthesized and grafted onto the surface of wollastonite particles. The prepared grafted-wollastonite particles (g-W) were then incorporated into poly (ether ether ketone) (PEEK) matrix via melting blend. The properties of the PEEK composites were investigated using differential scanning calorimetry, universal tester and rheometer. The results showed that the mechanical properties of the PEEK/g-W composites were markedly enhanced, the complex viscosity of PEEK/g-W composites was increased, and both the peak crystallization temperature (T _c) and crystalline fraction (χ _c) of the g-W-reinforced PEEK composites were significantly higher in comparison with those of non-treated wollastonite-reinforced PEEK composites. It is concluded that these results were due to the strong interaction between the grafted-wollastonite particles and the PEEK matrix, and the properties of the PEEK/g-W composites were slightly different because of the different structure of the polymer oligomers.

Keywords

Polymer composites grafting differential scanning calorimetry (DSC)mechanical properties rheological properties

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