Studies on the mechanical, thermal, and morphological properties of poly(ether ether ketone)/poly(ether sulfone)/barium titanate nanocomposites: Correlation of experimental results with theoretical predictive models

Abstract

In this study, mechanical, thermal, and morphological properties of the nanocomposites fabricated with the optimized blend of poly(ether ether ketone) (PEEK) and poly(ether sulfone) (PES) incorporated with nanobarium titanate (BT) were investigated. The optimized blend was based on the mechanical and thermal properties of the PEEK and PES in the ratio of 75 : 25 wt %. Nanoparticles were incorporated into the optimized blend with the help of twin‐screw extruder. The concentration of nano‐BT was varied from 2 to 6 wt % (0.41–1.28 vol %). With the increase in the nanosized BT concentrations, the tensile strength, tensile modulus, and elongation at break increased, whereas the crystallinity of the nanocomposites calculated by using differential scanning calorimetry method was found to decrease marginally. Morphological studies were carried out using scanning electron microscopy. The nanocomposites were evaluated by using theoretical predictive models according to “Pukanszky model” applicable to tensile strength and “Takayanagi's model” and “Guth and Smallwood model” applicable to tensile modulus. Upper and lower boundary of Hashin–Shtrikman model as well as Paul's model, applicable to tensile modulus, were also used to compare the experimental data. © 2012 Wiley Periodicals, Inc. J Appl Polym Sci, 2012

Influence of Electron Beam Irradiation on High‐Temperature Mechanical Properties of Ethylene Vinyl Acetate/Carbon Fibers Composites

“…Correlation of experimental increase in modulus with theoretical predictive models was well illustrated e.g. by Mandal et al [20].…”

“…EVA copolymer with carbon fiber was mixed and homogenized with various concentrations (5,10,15,20,25 wt.%) using two-roll mill at 150 °C for 5 min.…”

Reliability Studies Based on the Tensile Properties of the Polymer Nanocomposites

“…PEK is also semi crystalline polymer with glass transition temperature of 155 ℃ and melting point of 365 ℃ [11]. PES is an amorphous polymer with high glass transition temperature of 216 ℃ and melting point of 335 ℃ [13]. The densities of PEEK, PEK and PES are 1.303g/ cm 3 , 1.317 g/cm 3 and 1.370g/cm 3 respectively.…”

“…The density and melting point of BaTiO 3 was 6.01g/cm 3 and 1650 ℃ respectively. The nanocomposites were prepared following the procedure described elsewhere [11,13]. The fabricated nanocomposites were tested for tensile properties as per the reported method [11,13].…”

“…Among other interesting properties of PES, are good hydrolytic and thermo-oxidative stability, high rigidity and creep resistance. The high T g of PES suggests the polymer as a suitable candidate for developing PEEK based blends [12,13]. Various studies have been carried out by different researchers on PEEK based composites [14][15][16].…”