Mechanical properties of biomass-derived silica nanoparticles reinforced PMMA composite material

Abstract

Rice husk was used to produce silica particles, which were then used to reinforce the polymer matrix. The synthesized SiO2 particles were characterized using X-ray diffraction, Fourier transforms infrared spectroscopy (FTIR) and scanning electron microscopy with EDS. In a PMMA matrix, prepared SiO2 particles in amounts of 1, 3, and 5 wt.% were used as reinforcing agents. The goal of this research was to see if SiO2 particles had any effect on the mechanical properties of polymer composite materials. The morphology of the composites was examined using a field emission scanning electron microscope (FE-SEM). Vickers microindentation hardness and impact testing were used to determine the mechanical properties of the obtained composites. The indentation creep?s behavior of a polymethylmetacrylate (PMMA) composite material with varying amounts of nanoparticles (SiO2) was investigated and analyzed.

Mechanical properties of acrylate matrix composite reinforced with manganese‐aluminum layered double hydroxide

“…The significantly higher stress exponent observed in the neat PMMA sample compares to the MnAl‐LDH PMMA samples. The value of stress exponent obtained for neat PMMA matrix was 8.72 obtained for applied load of 50 gf 29 and 7.08 for 100 gf. All of that suggested that the incorporation of particles has effectively reinforced the material.…”

“…28 Polymers are known for their viscoelastic behavior and this can be accessed using the creep parameter, namedstress exponent μ, that is a part of the Sargent-Ashby (S-A) model. 29,30 Three samples having different amounts of MnAl-LDH particles, were tested. Equation ( 2) gives the relation between the time-dependent composite hardness H c and stress exponent μ as:…”

“…where ε 0 is the strain rate at reference stress σ 0 , c is constant, t is dwell time, and μ is the stress exponent. 29,31,32 The straight and parallel lines were obtained after plots of ln t À ln H c functions, whose slopes (k) represent equivalent with the negative and inverse values of stress exponent (À1/μ). Energy absorption of PMMA matrix and composite materials were tested at controlled speed impact tester.…”

“…Polymers are known for their viscoelastic behavior and this can be accessed using the creep parameter, named—stress exponent μ , that is a part of the Sargent–Ashby (S–A) model 29,30 . Three samples having different amounts of MnAl‐LDH particles, were tested.…”

“…Three samples having different amounts of MnAl‐LDH particles, were tested. Equation () gives the relation between the time‐dependent composite hardness H c and stress exponent μ as: where ε 0 is the strain rate at reference stress σ 0 , c is constant, t is dwell time, and μ is the stress exponent 29,31,32 . The straight and parallel lines were obtained after plots of ln t − ln H c functions, whose slopes ( k ) represent equivalent with the negative and inverse values of stress exponent (−1/ μ ).…”