Microhardness of PEEK/ceramic micro- and nanocomposites: Correlation with Halpin–Tsai model

UV-nanoimprint lithography and large area roll-to-roll texturization with hyperbranched polymer nanocomposites for light-trapping applications

“…It increased roughly linearly with silica loading, to approximately 200 MPa for 20 vol% of particles, and to 283 MPa for 50 vol% of particles. Such an increase is comparable to that observed in other nanocomposite materials [19,36]. The moderate increase at the highest investigated particle concentration of 50 vol% was attributed to the presence of porosity resulting from the entrapment of air during the mixing process.…”

“…4 was fitted to the experimental data, giving a coefficient Z equal to 0.055. Comparable values were reported for other polymer nanocomposites [36]. A further approach was proposed by Goyal et al [36] using the Halpin-Tsai equation.…”

“…Comparable values were reported for other polymer nanocomposites [36]. A further approach was proposed by Goyal et al [36] using the Halpin-Tsai equation. However, this equation was developed to model the elastic modulus of composites, and may not be relevant for properties such as hardness involving plastic deformations.…”

Review on Mechanical property Modification technique of Polyetheretherketone (PEEK) Composites

“…Mixing of AlN in micro size and nano size ceramic particles leads to the increase in the micro hardness. It was also seen that hardness is greater for nano composites than micro composites due lesser distance between in the nano particles [6]. Higher thermal stability was observed by Thermo P…”

Incorporation of titanate nanosheets to enhance mechanical properties of water-soluble polyamic acid

“…The Halpin-Tsai equation is also able to predict hardness of micro and nanocomposite by simply changing the modulus with hardness [25]. The hardness of the matrix (Hm) is determined by nanoindentation of pure PAAS while the hardness of TiO2 (10.99 GPa) is taken from literature [24].…”