“…34 Another study by Triaki et al confirmed the same observation of coarse surface appearance at the fracture surface, and they attributed it to the pull out of the nanoclay aggregates from the matrix. 35 Figure 9.The neat specimen (unreinforced blend).Figure 10.The specimen reinforced with 7% wt. nanoclay.…”
Section: Resultsmentioning
confidence: 99%
“…34 Another study by Triaki et al confirmed the same observation of coarse surface appearance at the fracture surface, and they attributed it to the pull out of the nanoclay aggregates from the matrix. 35 The influence of nanofillers as potential compatibilizers to polymer blends has been studied extensively, and one of its facets is how they affect microscopic morphology. The nature of filler itself can be decisive on how it can perform as a compatibilizer, i.e., the shape, chemistry, or size.…”
Section: Scanning Electron Microscope Imagingmentioning
Polymer composite materials were prepared using kaolinite nanoclay as reinforcement in different weight fractions (3, 5 and 7) %, and blends of epoxy and polymethyl methacrylate (PMMA) as matrices. The current work aims to prepare a composite material with good thermal and acoustic insulation, besides improved mechanical properties, and the investigation of the effect of this nano additive on the compatibility between the two constituents of the blend, and how this compatibility might be beneficial to the performance of the prepared composite. The blend with an optimum mixing ratio (OMR) was chosen via impact test results; thus, the (80:20) percentage of epoxy and PMMA was chosen. The reinforced specimens showed an improvement in mechanical (impact and flexural) properties besides sound insulation and thermal conductivity, with the specimen reinforced with 7% nanoclay having the highest impact strength (97*10−3) KJ/m2 and the highest thermal conductivity value of (0.34) W/m.°C, with a sound intensity value 95.6 decibels at frequency 10,000 Hz. The scanning electron microscope images showed two separate phases in the unreinforced blend. In comparison, the 7% reinforced specimen showed a rough interface between the two polymer phases, suggesting a positive effect of nanoclay addition on compatibility. The differential scanning calorimeter showed two distinct glass transition temperatures for both reinforced and neat specimens, which belong to the glass transitions of both constituents (epoxy and PMMA). The main difference is the lower temperature gradient accompanied with the (nanoclay/blend) composite than the neat one. Although the blend remained immiscible, nanoclay had contributed to the compatibility and improved mechanical properties.
“…34 Another study by Triaki et al confirmed the same observation of coarse surface appearance at the fracture surface, and they attributed it to the pull out of the nanoclay aggregates from the matrix. 35 Figure 9.The neat specimen (unreinforced blend).Figure 10.The specimen reinforced with 7% wt. nanoclay.…”
Section: Resultsmentioning
confidence: 99%
“…34 Another study by Triaki et al confirmed the same observation of coarse surface appearance at the fracture surface, and they attributed it to the pull out of the nanoclay aggregates from the matrix. 35 The influence of nanofillers as potential compatibilizers to polymer blends has been studied extensively, and one of its facets is how they affect microscopic morphology. The nature of filler itself can be decisive on how it can perform as a compatibilizer, i.e., the shape, chemistry, or size.…”
Section: Scanning Electron Microscope Imagingmentioning
Polymer composite materials were prepared using kaolinite nanoclay as reinforcement in different weight fractions (3, 5 and 7) %, and blends of epoxy and polymethyl methacrylate (PMMA) as matrices. The current work aims to prepare a composite material with good thermal and acoustic insulation, besides improved mechanical properties, and the investigation of the effect of this nano additive on the compatibility between the two constituents of the blend, and how this compatibility might be beneficial to the performance of the prepared composite. The blend with an optimum mixing ratio (OMR) was chosen via impact test results; thus, the (80:20) percentage of epoxy and PMMA was chosen. The reinforced specimens showed an improvement in mechanical (impact and flexural) properties besides sound insulation and thermal conductivity, with the specimen reinforced with 7% nanoclay having the highest impact strength (97*10−3) KJ/m2 and the highest thermal conductivity value of (0.34) W/m.°C, with a sound intensity value 95.6 decibels at frequency 10,000 Hz. The scanning electron microscope images showed two separate phases in the unreinforced blend. In comparison, the 7% reinforced specimen showed a rough interface between the two polymer phases, suggesting a positive effect of nanoclay addition on compatibility. The differential scanning calorimeter showed two distinct glass transition temperatures for both reinforced and neat specimens, which belong to the glass transitions of both constituents (epoxy and PMMA). The main difference is the lower temperature gradient accompanied with the (nanoclay/blend) composite than the neat one. Although the blend remained immiscible, nanoclay had contributed to the compatibility and improved mechanical properties.
“…Generally, polymer nanocomposites are composites consisting of a polymer matrix containing a dispersion of nanoscale particles. Nanocomposites can be prepared in solution or by in situ polymerization, but today nanocomposites are preferentially prepared by melt-mixing using conventional compounding processes such as twin-screw extrusion [ 1 , 2 , 3 , 4 , 5 ].…”
Section: Introductionmentioning
confidence: 99%
“…Due to the large surface area of nanosize particles, only small amounts are needed to cause significant changes in the mechanical (Young’s modulus and strength), physical, thermal, and electrical properties of polymer nanocomposites. In this way, preferably better properties of nanocomposites (compared with conventional microcomposites) can be achieved [ 4 , 6 ].…”
Polymer nanocomposites consist of a polymer matrix and reinforcing particles that have at least one dimension under 100 nm. The processing of nanocomposite polymers is the most important stage, determining the final properties of nanocomposites. Nanocomposites are now preferentially prepared by melt-mixing using conventional compounding processes such as twin-screw extrusion. Many processing parameters (polymer matrix type, content and type of nanofiller, barrel temperature, screw speed, number and shape of extruder screws, etc.) affect the properties of nanocomposites. This research work represents an investigation of the influence of processing parameters (amount of nanoclay filler, the screw rotation speed, and extruder barrel temperature) on the flexural properties of polyamide 12/nanoclay-reinforced nanocomposite. From the test results, it is apparent that an increase in nanoclay content from 1 to 8% significantly increases flexural strength. The obtained nanocomposite has a 19% higher flexural strength and a 56% higher flexural modulus than pure PA12. Mathematical models that show the dependence of flexural strength and flexural modulus on the processing parameters used were obtained as a result of this analysis.
The aim of the work described in this paper is to improve the thermal stability and mechanical properties of polypropylene (PP)/styrene‐ethylene‐butylene‐styrene (SEBS)/clay nanocomposites fabricated by fused filament fabrication (FFF). The response surface method is used to investigate the effect of print speed, nozzle temperature, and nano‐clay content on the thermal stability, tensile strength, and impact resistance of the PP/SEBS/clay nanocomposite. In addition, the microstructure of the printed samples was analyzed by SEM and TEM images. Increasing the nano‐clay amount significantly enhanced the melting temperature of the nanocomposite, while increasing nozzle temperature and print speed had a slight influence on the melting temperature. Moreover, the highest tensile strength of the nanocomposite was attained at a clay content of 3 wt%, due to the good distribution of the nanoparticles in the PP matrix. The impact resistance of the nanocomposite was also enhanced with an increase in print speed, while an increase in nozzle temperature and clay content reduced the impact resistance. The optimization results indicated that the melting temperature, tensile strength, and impact resistance of the PP/SEBS/clay nanocomposite can be enhanced simultaneously by a print speed of 80 mm/s, nozzle temperature of 242°C and nano‐clay content of 3.2 wt%.Highlight
Fabrication of PP/SEBS/clay nanocomposite using the FFF process.
Studying the effect of FFF parameters on the thermal and mechanical properties.
Predicting the optimum values of the FFF parameters.
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