Study on the physical and mechanical properties of electron‐beam‐irradiated Vinyl ester/TiO₂ nanocomposites

Abstract

The effect of electron beam irradiation on the physical and mechanical properties of vinyl ester nanocomposites containing various amounts of TiO2 nanoparticles was investigated. The fracture toughness, surface hardness, and water uptake measurements were carried out to investigate alterations in the physical and mechanical properties owing to electron beam exposure. In this regard, it was attempted to infer the impact of TiO2 nanoparticles on the structural changes varying the irradiation dose. The results were then explained based on crosslinking and chain scission phenomena. Moreover, scanning electron microscopy was used to assess the degree of TiO2 dispersion within the polymer matrix. J. VINYL ADDIT. TECHNOL., 22:110–116, 2016. © 2014 Society of Plastics Engineers

Thermal, mechanical, and corrosion resistance properties of vinyl ester/clay nanocomposites for the matrix of carbon fiber‐reinforced composites exposed to electron beam

“…However, at the higher studied radiation dose (1000 kGy), the chain‐scissioning reactions in polymeric matrix dominated the cross‐linking reactions and the mechanical properties deteriorated. The same trend is reported by Shahrajabian et al …”

“…However, at the higher studied radiation dose (1000 kGy), the chain-scissioning reactions in polymeric matrix dominated the cross-linking reactions and the mechanical properties deteriorated. The same trend is reported by Shahrajabian et al 16 The incorporation of carbon fiber intensely ameliorated the mechanical properties of the vinyl ester matrix (Figures 8 and 9). For example, the tensile strength of the pure vinyl ester polymer was increased from 13 to 435 MPa after reinforcement by carbon fiber.…”

Investigating the mechanical properties and morphology of novalac phenolic resin nanocomposite/hybrid short fibers carbon and glass reinforced with silica nanoparticles

“…Also, in Figure 5 of SEM images, it was observed that with the presence of nanoparticles in the matrix, the degree of adhesion between resin and fibers has increased, which has increased the strength and hardness of the samples with 2 wt% silica nanoparticles. 7–9,11,12,26,27,31,34–37

Figure 10.Force-extension diagrams for examples PF/CGF40% and PF/CGF50% (a) Tensile test (b) Bending test (c) Buckling test.

Figure 11.Force-extension curve of composite samples with different amplifiers (a) tensile test (b) bending test (c) buckling test.

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“…Also, in Figure 5 of SEM images, it was observed that with the presence of nanoparticles in the matrix, the degree of adhesion between resin and fibers has increased, which has increased the strength and hardness of the samples with 2 wt% silica nanoparticles. [7][8][9]11,12,26,27,31,[34][35][36][37] In the introduction section, the research conducted by Rostamian et al 19 for the fabrication of phenolic resin nanocomposites with short carbon fibers reinforced with silica and clay nanoparticles was given. that the nanocomposite samples were studied and examined in terms of strength and morphology properties by applying damage in a corrosive environment, and the results showed that with the increase in the weight percentage of short carbon fibers, the strength increases, but the plastic deformation is limited.…”

“…Fracture toughness results showed that the epoxy/silica composite had a 25–30% higher hardness than pure epoxy. Shahrajabian et al 12 introduced various amounts of clay and titanium nanoparticles into vinyl ester resin and discussed their structural and mechanical properties. The results of tensile, bending and fracture tests showed that clay toughness is higher than that of titanium.…”