Mechanical behaviour assessment of unsaturated polyester polymer mortars filled with nano-sized Al 2 O 3 and ZrO 2 particles

Sousa, Susana P.B.; Ribeiro, M. C. S.; Nóvoa, Paulo; Pereira, Celeste M.C.; Ferreira, A.J.M.

doi:10.1016/j.ctmat.2016.08.002

Cited by 16 publications

(4 citation statements)

References 7 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…This enhancement is because the particles are fragile (brittle) and there is no sliding characteristic between the used nano-particle molecules, so they enhance the brittleness and toughness of the material. Figure (12) shows a reduction in the experimental results of the damping ratio, where they decreased by about (-23.18%) after adding 14% vf of glass fiber mats. This decrease is due to the presence of fibers in the polyester resin, which increases the toughness of the composites and results in less sliding across surfaces.…”

Section: Fracture Toughness Test Resultsmentioning

confidence: 94%

“…Many studies have found that adding fibers and nanoparticles to polymer composites improves their mechanical characteristics. Sousa et al (2017) studied the unsaturated polyester-based PMs modified by the nanoparticles (ZrO2, and Al2O3) and their effects on the mechanical properties. The results showed that the compressive strength, flexural strength, and Shore D hardness tests were improved by adding the nanoparticles.…”

Section: Introductionmentioning

confidence: 99%

“…The results showed that the compressive strength, flexural strength, and Shore D hardness tests were improved by adding the nanoparticles. Also, it was noticed that adding ZrO2 gave higher mechanical properties than Al2O3 [12]. P. Prabhu et al (2018) investigated the addition of various weight fractions of nanoclay particles (0, 1, 2, 3, 4, and 5%) to glass fiberreinforced polyester composite (GFRP) and its effect on the mechanical properties.…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Improving the Mechanical Properties of a Car Bumper by Using Glass Fiber Reinforced Composite Laminates and Nano-ceramic Filler

Hayder

Mahmood

2022

IJOIR

View full text Add to dashboard Cite

In this study, mechanical tests were performed on a Chinese car bumper of the Chery model, which was chosen for examination due to its widespread use in Iraqi streets. It was also compared to the best specimens obtained in these study stages. Glass fiber mats and nanoparticles have been mixed with the unsaturated polyester resin (UPE) in two stages. In the first stage, the fibers have been mixed with a volume fraction of 14% and the mechanical properties have been calculated. In the second stage, different weight fractions of nanoparticles of zirconium oxide (ZrO2) were added to the mixture, and the mechanical tests were recalculated. The experimental test's results illustrated that the tensile strength, fracture toughness, and damping ratio of the composite material were enhanced when mixing 14% vf of glass fiber mats with unsaturated polyester resin by about (285.85%, 207.56%, and 100%) respectively, compared to the car bumper, while the ratio of impact resistance decreased by about (-24.55%). The same tests were repeated after adding different weight fractions (1%, 2%, 2.5%, 3%, 3.5%, 4%) of (ZrO2) and it was observed that adding the nanoparticles had a significant effect on the mechanical properties since at first, it improved them until the nanoparticles ratio reached 2.5 wt.%, but any higher addition than this ratio caused a decrease in the enhancement of the mechanical properties. Thus, it was found that adding 2.5 wt.% nanoparticles gave us the best improvement in the tensile strength, impact resistance, fracture toughness, and damping ratio by about (436.32%, 47.28%, 438.66%, and 52.3%) respectively, compared to the car bumper properties.

show abstract

Section: Fracture Toughness Test Resultsmentioning

confidence: 94%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Improving the Mechanical Properties of a Car Bumper by Using Glass Fiber Reinforced Composite Laminates and Nano-ceramic Filler

Hayder

Mahmood

2022

IJOIR

View full text Add to dashboard Cite

show abstract

“…In the absence of nanomaterials, the mortar matrix has a dispersed structure and the voids (as shown by yellow ovals) and needle-like ettringites (as shown by yellow arrows) are more prominent than in the treated sample (Figure 12). However, the presence of nanomaterials causes the mortar to have a dense structure by reducing the number of voids and ettringites, as they can promote the formation of C-S-H gel through an accelerated hydration process [30,80,147]. However, the addition of nanomaterials accelerates the hydration process and enhances the formation of C-S-H gel (as marked by yellow hexagons), which makes the microstructure denser, thereby increasing the strength and durability of the treated sample.…”

Section: Microstructural Characterizationmentioning

confidence: 99%

Comparative Overview of the Performance of Cementitious and Non-Cementitious Nanomaterials in Mortar at Normal and Elevated Temperatures

et al. 2021

View full text Add to dashboard Cite

Nanotechnology has emerged as a field with promising applications in building materials. Nanotechnology-based mortars are examples of such building materials that have widespread applications in the construction industry. The main nanomaterials used in mortars include nano-silica, nano-magnesium oxide, nano-alumina, nano-titanium oxide, nano-zinc oxide, nano-clay, and nano-carbon. This review paper presents a summary of the properties and effects of these nanomaterials on cement mortar in terms of its fresh-state and hard-state properties. The fresh-state properties include the setting time, consistency, and workability, while the hard-state properties include mechanical properties such as compressive, flexural, tensile strengths, as well as the elasticity modulus, in addition to durability properties such as water absorption, shrinkage strain, strength loss due to freeze–thaw cycles, and chloride penetration, among others. Different nanomaterials cause different physical and chemical alterations within the microstructures of cement mortar. Therefore, the microstructural characterization and densification of mortar are discussed in detail at varying temperatures. In general, the involvement of nanomaterials in cement mortar influences the fresh-state properties, enhances the mechanical properties, and impacts the durability properties, while reducing the porosity present in the mortar matrix. Cementitious nanomaterials can create a pathway for the easy injection of binding materials into the internal microstructures of a hydration gel to impact the hydration process at different rates, whereas their non-cementitious counterparts can act as fillers. Furthermore, the research gaps and future outlook regarding the application of nanomaterials in mortar are discussed.

show abstract

Controlled curing of resole phenol formaldehyde/unsaturated polyester blends and applying for steel–steel adhesive

Badr

Darwish

El‐Rahman

et al. 2022

J of Applied Polymer Sci

View full text Add to dashboard Cite

Polymer blending technique is a promising solution for solving some critical industrial problems by gaining new desired properties for the newly formed materials. Blending various ratios of resole phenol formaldehyde (RPF)/unsaturated polyester (USPE), 10, 20, 30, to 90 wt %, were processed to optimize the mixing conditions by controlling time, temperature, and ratio of blending. In addition, the curing conditions of touch dry, full curing, shelf life, hardness and the steel–steel adhesive were investigated. The blend ratio RPF/USPE (70:30) was selected as an optimized sample at 150°C for 50 min. It was characterized by Fourier transform infrared spectroscopy, dynamic mechanical analysis, scanning electron microscopy, X‐ray diffraction, thermogravimetric analysis, and differential scanning calorimeter. The curing process and the interactions between RPF and USPE were studied. Durability with artificial weather aging was evaluated visually and by measuring hardness which confirmed the prepared material is fit for outdoor uses. This work introduces a strategy to control the curing process, enhance the shelf life and adhesion properties for steel–steel adhesives based on RPF/USPE blends.

show abstract

Mechanical behaviour assessment of unsaturated polyester polymer mortars filled with nano-sized Al 2 O 3 and ZrO 2 particles

Cited by 16 publications

References 7 publications

Improving the Mechanical Properties of a Car Bumper by Using Glass Fiber Reinforced Composite Laminates and Nano-ceramic Filler

Improving the Mechanical Properties of a Car Bumper by Using Glass Fiber Reinforced Composite Laminates and Nano-ceramic Filler

Comparative Overview of the Performance of Cementitious and Non-Cementitious Nanomaterials in Mortar at Normal and Elevated Temperatures

Controlled curing of resole phenol formaldehyde/unsaturated polyester blends and applying for steel–steel adhesive

Contact Info

Product

Resources

About