In this study, the penetration and perforation performance of nanoclay reinforced unsaturated pol... more In this study, the penetration and perforation performance of nanoclay reinforced unsaturated polyester resin/fibreglass nanocomposite laminates have been investigated via quasi-static indentation tests using ahemispherical nose indenter. Unsaturated polyester resin (UP) was mixed with 1.5 and 3 wt.% nanoclay using a homogenizer stirrer to prepare a homogeneous mix. UP reinforced nanocomposite was then utilized to manufacture 150 × 150 mm2 laminated composite panels using 400 g/m2 glass fibre woven roving via a hand lay-up process. X-ray diffractometry, transmission electron microscopy analysis, energy-dispersive X-ray (EDXA) analysis and measurement of viscosity changes in the liquid state resin confirmed the exfoliation and the intercalation of the nanoclay by the unsaturated polyester resin system used. Quasi-static perforation tests were conducted using a surface-hardened steel indenter with a hemispherical tip at 5 and 500 mm/min load rates on nanocomposite laminated plates. Me...
In this research, for the first time, the effects were investigated of nanoclay as a secondary re... more In this research, for the first time, the effects were investigated of nanoclay as a secondary reinforcement, titanium dioxide (TiO2) and hindered amine light stabilizer (HALS) as UV stabilizers on some properties of high density polyethylene (HDPE)/pistachio shell flour (PSF) composite as the new wood plastic composite (WPC). WPCs of HDPE/PSF with different levels of nanoclay (Cloisite 20A), TiO2 and HALS were prepared. Some properties were investigated before exposure to weathering conditions. Design of experiments (DOE) was carried out to find the best formulation and decrease the number of tests. WPC granules were prepared by melt-mixing method using a twin screw extruder, and then moulded using an injection moulding machine to prepare samples. The results of X-ray diffractometry (XRD) indicated partial exfoliation and intercalation of samples containing 3 and 6 per hundred composite (phc) of nanoclay. The tensile strength and modulus of HDPE/PSF samples containing 3 and 6 phc n...
... Correspondence: Saied Nouri Khorasani, Department of Chemical Engineering, Isfahan University... more ... Correspondence: Saied Nouri Khorasani, Department of Chemical Engineering, Isfahan University of Technology, PO Box 84156-83111, Isfahan, IR Iran. ... LDPE-grafted maleic anhydride (PE-g-Man), from Kimia Javid Company Iran was used as a coupling agent. ...
In this study, microcellular foaming of low-density polyethylene (LDPE) using nano-calcium carbon... more In this study, microcellular foaming of low-density polyethylene (LDPE) using nano-calcium carbonate (nano-CaCO3) were carried out. Nanocomposite samples were prepared in different content in range of 0.5–7 phr nano-CaCO3 using a twin screw extruder. X-ray diffraction and scanning electron microscopy (SEM) were used to characterize of LDPE/nano-CaCO3 nanocomposites. The foaming was carried out by a batch process in compression molding with azodicarbonamide (ADCA) as a chemical blowing agent. The cell structure of the foams was examined with SEM, density and gel content of different samples were measured to compare difference between nanocomposite microcellular foam and microcellular foam without nanomaterials. The results showed that the samples containing 5 phr nano-CaCO3 showed microcellular foam with the lowest mean cell diameter 27 μm and largest cell density 8 × 108 cells/cm3 in compared other samples.
This study investigates the effects of nanoclay particles on impact and flexural properties of gl... more This study investigates the effects of nanoclay particles on impact and flexural properties of glass fiber-reinforced unsaturated polyester (UP) composites. UP-reinforced nanocomposite containing 1.5 and 3 wt % nanoclay was used to manufacture laminated composite panels using glass fiber woven roving by hand lay-up method. X-ray diffraction and transmission electron microscopy analysis confirmed intercalation and exfoliation of the nanoclay in the UP resin. Flexural test results indicated better performance for the specimens containing 1.5 wt % nanoclay reinforcements. However, Izod impact test results showed a decrease with increase in nanoclay content. High-velocity impact tests were carried out on a gas gun in velocity range of 90–220 m/s using harden steel hemispherical tip projectile. Highest performance in ballistic limit and energy absorption were obtained for specimens containing 1.5 wt % nanoclay.
The aim of this study is to investigate the performance of nanoclay reinforced unsaturated polyes... more The aim of this study is to investigate the performance of nanoclay reinforced unsaturated polyester (UP) resin under impact loads. Nanocomposite specimens containing nanoclay in 0, 1.5, and 3 (wt%) were prepared by melt mixing method. X-ray diffraction, transmission electron microscopy analysis, scanning electron microscope photographs, and viscosity changes in liquid state resin confirmed exfoliation and intercalation of the nanoclay in the UP resin system used. Tensile modulus showed an increase with increase in nanoclay content. However, the tensile strength and elongation at break exhibited reducing performance with increase in nanoclay content. Izod impact test results indicated better performance for the specimens containing nanoclay reinforcements, with 1.5 (wt%) of nanoclay specimens showing the highest value. High velocity impact tests were carried out using gas gun in velocity range of 20–100 m/sec and harden steel hemispherical tip projectile with diameter of 8.7 mm and weight of 11.54 g. Results for high velocity impact test indicated better performance by the specimens containing nanoclay, with 1.5 (wt%) nanoclay showing the highest attained value. Damage assessments of impact area for all specimens showed spalling type brittle failure with punch out and sever fragmentation pattern
This study compares some analytical models on high velocity impact behaviour of composite materia... more This study compares some analytical models on high velocity impact behaviour of composite materials with that of experimental results from high velocity impact of hemispherical nose projectiles on nanoclay-filled composite plates in particular, assessing current models to account for the presence of nanoclay in polymer composites under such loading. Nanocomposites were prepared in 0, 1.5 and 3 wt%. The nanoclay-filled polyester resin was then utilised to manufacture laminated composite panels in four, eight and 12 layers using 400 g/m2 glass fibre woven roving via hand lay-up method. Transmission electron microscopy and X-ray diffraction confirmed intercalation and exfoliation of the nanoclay in the polyester resin system. Five models were selected for assessment. Comparison of predicted ballistic limit velocity (velocity at which the projectile remains in the composite target) with that of experimental results showed close correlation in all thickness for models that incorporated projectile nose geometry. A simple empirical equation is derived as a function of polymer laminate thickness and flexural modulus of polymer nanocomposite laminates, which varies with nanoclay content in polymer composite laminates for predicting ballistic limit velocity.
This study compares some analytical models on high velocity impact behaviour of composite materia... more This study compares some analytical models on high velocity impact behaviour of composite materials with that of experimental results from high velocity impact of hemispherical nose projectiles on nanoclay-filled composite plates in particular, assessing current models to account for the presence of nanoclay in polymer composites under such loading. Nanocomposites were prepared in 0, 1.5 and 3 wt%. The nanoclay-filled polyester resin was then utilised to manufacture laminated composite panels in four, eight and 12 layers using 400 g/m2 glass fibre woven roving via hand lay-up method. Transmission electron microscopy and X-ray diffraction confirmed intercalation and exfoliation of the nanoclay in the polyester resin system. Five models were selected for assessment. Comparison of predicted ballistic limit velocity (velocity at which the projectile remains in the composite target) with that of experimental results showed close correlation in all thickness for models that incorporated projectile nose geometry. A simple empirical equation is derived as a function of polymer laminate thickness and flexural modulus of polymer nanocomposite laminates, which varies with nanoclay content in polymer composite laminates for predicting ballistic limit velocity.
In this study, the penetration and perforation performance of nanoclay reinforced unsaturated pol... more In this study, the penetration and perforation performance of nanoclay reinforced unsaturated polyester resin/fibreglass nanocomposite laminates have been investigated via quasi-static indentation tests using ahemispherical nose indenter. Unsaturated polyester resin (UP) was mixed with 1.5 and 3 wt.% nanoclay using a homogenizer stirrer to prepare a homogeneous mix. UP reinforced nanocomposite was then utilized to manufacture 150 × 150 mm2 laminated composite panels using 400 g/m2 glass fibre woven roving via a hand lay-up process. X-ray diffractometry, transmission electron microscopy analysis, energy-dispersive X-ray (EDXA) analysis and measurement of viscosity changes in the liquid state resin confirmed the exfoliation and the intercalation of the nanoclay by the unsaturated polyester resin system used. Quasi-static perforation tests were conducted using a surface-hardened steel indenter with a hemispherical tip at 5 and 500 mm/min load rates on nanocomposite laminated plates. Me...
In this research, for the first time, the effects were investigated of nanoclay as a secondary re... more In this research, for the first time, the effects were investigated of nanoclay as a secondary reinforcement, titanium dioxide (TiO2) and hindered amine light stabilizer (HALS) as UV stabilizers on some properties of high density polyethylene (HDPE)/pistachio shell flour (PSF) composite as the new wood plastic composite (WPC). WPCs of HDPE/PSF with different levels of nanoclay (Cloisite 20A), TiO2 and HALS were prepared. Some properties were investigated before exposure to weathering conditions. Design of experiments (DOE) was carried out to find the best formulation and decrease the number of tests. WPC granules were prepared by melt-mixing method using a twin screw extruder, and then moulded using an injection moulding machine to prepare samples. The results of X-ray diffractometry (XRD) indicated partial exfoliation and intercalation of samples containing 3 and 6 per hundred composite (phc) of nanoclay. The tensile strength and modulus of HDPE/PSF samples containing 3 and 6 phc n...
... Correspondence: Saied Nouri Khorasani, Department of Chemical Engineering, Isfahan University... more ... Correspondence: Saied Nouri Khorasani, Department of Chemical Engineering, Isfahan University of Technology, PO Box 84156-83111, Isfahan, IR Iran. ... LDPE-grafted maleic anhydride (PE-g-Man), from Kimia Javid Company Iran was used as a coupling agent. ...
In this study, microcellular foaming of low-density polyethylene (LDPE) using nano-calcium carbon... more In this study, microcellular foaming of low-density polyethylene (LDPE) using nano-calcium carbonate (nano-CaCO3) were carried out. Nanocomposite samples were prepared in different content in range of 0.5–7 phr nano-CaCO3 using a twin screw extruder. X-ray diffraction and scanning electron microscopy (SEM) were used to characterize of LDPE/nano-CaCO3 nanocomposites. The foaming was carried out by a batch process in compression molding with azodicarbonamide (ADCA) as a chemical blowing agent. The cell structure of the foams was examined with SEM, density and gel content of different samples were measured to compare difference between nanocomposite microcellular foam and microcellular foam without nanomaterials. The results showed that the samples containing 5 phr nano-CaCO3 showed microcellular foam with the lowest mean cell diameter 27 μm and largest cell density 8 × 108 cells/cm3 in compared other samples.
This study investigates the effects of nanoclay particles on impact and flexural properties of gl... more This study investigates the effects of nanoclay particles on impact and flexural properties of glass fiber-reinforced unsaturated polyester (UP) composites. UP-reinforced nanocomposite containing 1.5 and 3 wt % nanoclay was used to manufacture laminated composite panels using glass fiber woven roving by hand lay-up method. X-ray diffraction and transmission electron microscopy analysis confirmed intercalation and exfoliation of the nanoclay in the UP resin. Flexural test results indicated better performance for the specimens containing 1.5 wt % nanoclay reinforcements. However, Izod impact test results showed a decrease with increase in nanoclay content. High-velocity impact tests were carried out on a gas gun in velocity range of 90–220 m/s using harden steel hemispherical tip projectile. Highest performance in ballistic limit and energy absorption were obtained for specimens containing 1.5 wt % nanoclay.
The aim of this study is to investigate the performance of nanoclay reinforced unsaturated polyes... more The aim of this study is to investigate the performance of nanoclay reinforced unsaturated polyester (UP) resin under impact loads. Nanocomposite specimens containing nanoclay in 0, 1.5, and 3 (wt%) were prepared by melt mixing method. X-ray diffraction, transmission electron microscopy analysis, scanning electron microscope photographs, and viscosity changes in liquid state resin confirmed exfoliation and intercalation of the nanoclay in the UP resin system used. Tensile modulus showed an increase with increase in nanoclay content. However, the tensile strength and elongation at break exhibited reducing performance with increase in nanoclay content. Izod impact test results indicated better performance for the specimens containing nanoclay reinforcements, with 1.5 (wt%) of nanoclay specimens showing the highest value. High velocity impact tests were carried out using gas gun in velocity range of 20–100 m/sec and harden steel hemispherical tip projectile with diameter of 8.7 mm and weight of 11.54 g. Results for high velocity impact test indicated better performance by the specimens containing nanoclay, with 1.5 (wt%) nanoclay showing the highest attained value. Damage assessments of impact area for all specimens showed spalling type brittle failure with punch out and sever fragmentation pattern
This study compares some analytical models on high velocity impact behaviour of composite materia... more This study compares some analytical models on high velocity impact behaviour of composite materials with that of experimental results from high velocity impact of hemispherical nose projectiles on nanoclay-filled composite plates in particular, assessing current models to account for the presence of nanoclay in polymer composites under such loading. Nanocomposites were prepared in 0, 1.5 and 3 wt%. The nanoclay-filled polyester resin was then utilised to manufacture laminated composite panels in four, eight and 12 layers using 400 g/m2 glass fibre woven roving via hand lay-up method. Transmission electron microscopy and X-ray diffraction confirmed intercalation and exfoliation of the nanoclay in the polyester resin system. Five models were selected for assessment. Comparison of predicted ballistic limit velocity (velocity at which the projectile remains in the composite target) with that of experimental results showed close correlation in all thickness for models that incorporated projectile nose geometry. A simple empirical equation is derived as a function of polymer laminate thickness and flexural modulus of polymer nanocomposite laminates, which varies with nanoclay content in polymer composite laminates for predicting ballistic limit velocity.
This study compares some analytical models on high velocity impact behaviour of composite materia... more This study compares some analytical models on high velocity impact behaviour of composite materials with that of experimental results from high velocity impact of hemispherical nose projectiles on nanoclay-filled composite plates in particular, assessing current models to account for the presence of nanoclay in polymer composites under such loading. Nanocomposites were prepared in 0, 1.5 and 3 wt%. The nanoclay-filled polyester resin was then utilised to manufacture laminated composite panels in four, eight and 12 layers using 400 g/m2 glass fibre woven roving via hand lay-up method. Transmission electron microscopy and X-ray diffraction confirmed intercalation and exfoliation of the nanoclay in the polyester resin system. Five models were selected for assessment. Comparison of predicted ballistic limit velocity (velocity at which the projectile remains in the composite target) with that of experimental results showed close correlation in all thickness for models that incorporated projectile nose geometry. A simple empirical equation is derived as a function of polymer laminate thickness and flexural modulus of polymer nanocomposite laminates, which varies with nanoclay content in polymer composite laminates for predicting ballistic limit velocity.
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Papers by javad moftakharian esfahani
results from high velocity impact of hemispherical nose projectiles on nanoclay-filled composite plates in particular,
assessing current models to account for the presence of nanoclay in polymer composites under such loading. Nanocomposites
were prepared in 0, 1.5 and 3 wt%. The nanoclay-filled polyester resin was then utilised to manufacture laminated composite
panels in four, eight and 12 layers using 400 g/m2 glass fibre woven roving via hand lay-up method. Transmission electron
microscopy and X-ray diffraction confirmed intercalation and exfoliation of the nanoclay in the polyester resin system.
Five models were selected for assessment. Comparison of predicted ballistic limit velocity (velocity at which the projectile
remains in the composite target) with that of experimental results showed close correlation in all thickness for models that
incorporated projectile nose geometry. A simple empirical equation is derived as a function of polymer laminate thickness and
flexural modulus of polymer nanocomposite laminates, which varies with nanoclay content in polymer composite laminates
for predicting ballistic limit velocity.
results from high velocity impact of hemispherical nose projectiles on nanoclay-filled composite plates in particular,
assessing current models to account for the presence of nanoclay in polymer composites under such loading. Nanocomposites
were prepared in 0, 1.5 and 3 wt%. The nanoclay-filled polyester resin was then utilised to manufacture laminated composite
panels in four, eight and 12 layers using 400 g/m2 glass fibre woven roving via hand lay-up method. Transmission electron
microscopy and X-ray diffraction confirmed intercalation and exfoliation of the nanoclay in the polyester resin system.
Five models were selected for assessment. Comparison of predicted ballistic limit velocity (velocity at which the projectile
remains in the composite target) with that of experimental results showed close correlation in all thickness for models that
incorporated projectile nose geometry. A simple empirical equation is derived as a function of polymer laminate thickness and
flexural modulus of polymer nanocomposite laminates, which varies with nanoclay content in polymer composite laminates
for predicting ballistic limit velocity.