Title: Crystal Morphology and Bending Modulus Uniformity of Polyetheretherketone in Thick Compression-Molded Parts

Authors: Ruaa Al-Mezrakchi, Terry Creasy , Hung-Jue Sue, and Tim Bremner

DOI: 10.33599/nasampe/c.19.0637

Abstract: Four processing schemes show how processing parameters affect crystalline morphology and bending modulus of a thick-walled polyetheretherketone (PEEK) component. The baseline process mimicked a typical industrial process (i.e. traditional free convection cooling), while the other three schemes considered an additional processing step with an isothermal hold at the crystallization temperature Tc for various durations. Wide angle x-ray scattering (WAXS) showed that an isothermal hold made crystallinity more uniform throughout the entire thick part. Three-point bend flexural tests demonstrated that the bending modulus was consistent at room temperature for all four processing schemes. However, controlled cooling process increases bending modulus at 225 °C. The average elevated temperature bending modulus increased by 45 % and variability fell from 6.5 % to 1.9 % throughout the thick parts. The novel, optimal processing scheme might produce better components for biomedical use, high temperature applications such as aerospace or oil and gas production.

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Conference: CAMX 2019

Publication Date: 2019/09/23

SKU: TP19-0637

Pages: 15

Price: $30.00