Title: NANOINDENT CHARACTERIZATION AND DSC EVALUATION OF ELONGATED SHEAR FLOW EXFOLIATED POLY-ETHER-ETHER-KETONE (PEEK) AND POLYSULFONE (PSU) BLENDS

Authors: Mohit Agarwal, Asaad Shaikh, Siddharth S. Ramkumar, Jennifer Lynch-Branzoi, Assimina A. Pelegri

DOI: 10.33599/nasampe/s.23.0200

Abstract: Poly-ether-ether-ketone (PEEK), known for excellent mechanical properties, high-temperature, and corrosion resistance, is blended with Polysulfone (PSU), a transparent and ultra-stable amorphous thermoplastic polymer. PSU has an affinity to PEEK with solid interfacial adhesion. Resultant PEEK-PSU blends are high-performance composites with enhanced dispersion and interfacial adhesive properties. PEEK and PSU were combined using a unique melt-mixing processing method that imparts uniform shear to form immiscible polymer blend composites at concentrations of 0/100, 20/80, 50/50, 80/20, and 100/0 wt. % PEEK in PSU. Mixing was done using a single-screw extrusion machine from Randcastle Extrusion Systems with a Molecular Homogenizer screw design. The effect of adding PEEK to PSU was investigated on the hardness and thermal properties. Nanoindentation tests were conducted to characterize hardness and reduced modulus. Differential scanning calorimetry (DSC) was used to determine glass-transition temperature (Tg), melting temperature (Tm), and crystallization temperature (Tc). The addition of PEEK to PSU enhances reduced modulus and hardness while maintaining similar thermal properties, proving a viable commercial, cost-effective alternative to PEEK in challenging environments

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Conference: SAMPE 2023

Publication Date: 2023/04/17

SKU: TP23-0000000200

Pages: 9

Price: $18.00