In the paper, extruded filaments of polyetheretherketone (PEEK) filled (1%v, 3%v, 5%v) with sub-micrometric titanium dioxide (TiO2) particles have been manufactured with the aim to increase the UV radiation resistance of PEEK matrix. The TiO2 particles affect crystallinity of PEEK matrix as it increases increasing filler content. The filler presence slightly increases the stiffness and the elastic modulus of resulting composites and does not influence largely the tensile strength but show an influence on the elongation at break enhancing a finger like failure mechanism ascribed to microcracks propagation and interspherulitc fracture. UV aging test showed the effectiveness of TiO2 particles in reducing the photo-degradation effect especially in 5%v filled sample resulting the most effective formulation. For this formulation, after UV aging the mechanical properties and the failure mechanism remains unchanged while the neat PEEK sample shows embrittlement and loss of ductility.

Bragaglia, M., Cherubini, V., Nanni, F. (2020). PEEK -TiO2 composites with enhanced UV resistance. COMPOSITES SCIENCE AND TECHNOLOGY, 199 [10.1016/j.compscitech.2020.108365].

PEEK -TiO2 composites with enhanced UV resistance

Bragaglia, M.;Cherubini, V.;Nanni, F.
2020-01-01

Abstract

In the paper, extruded filaments of polyetheretherketone (PEEK) filled (1%v, 3%v, 5%v) with sub-micrometric titanium dioxide (TiO2) particles have been manufactured with the aim to increase the UV radiation resistance of PEEK matrix. The TiO2 particles affect crystallinity of PEEK matrix as it increases increasing filler content. The filler presence slightly increases the stiffness and the elastic modulus of resulting composites and does not influence largely the tensile strength but show an influence on the elongation at break enhancing a finger like failure mechanism ascribed to microcracks propagation and interspherulitc fracture. UV aging test showed the effectiveness of TiO2 particles in reducing the photo-degradation effect especially in 5%v filled sample resulting the most effective formulation. For this formulation, after UV aging the mechanical properties and the failure mechanism remains unchanged while the neat PEEK sample shows embrittlement and loss of ductility.
2020
Pubblicato
Rilevanza internazionale
Articolo
Esperti anonimi
Settore ING-IND/22
Settore IMAT-01/A - Scienza e tecnologia dei materiali
English
Polymer-matrix composites (PMCs)
Particle-reinforced composites
Environmental degradation
Extrusion
Bragaglia, M., Cherubini, V., Nanni, F. (2020). PEEK -TiO2 composites with enhanced UV resistance. COMPOSITES SCIENCE AND TECHNOLOGY, 199 [10.1016/j.compscitech.2020.108365].
Bragaglia, M; Cherubini, V; Nanni, F
Articolo su rivista
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/2108/389342
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