Effect of Clay Addition on Mechanical Properties of Unsaturated Polyester/Glass Fiber Composites
TL;DR: In this paper, the effect of clay loading on the morphological and mechanical properties of unsaturated polyester (UP)/glass fiber/clay composites was investigated in a hand layup method.
Abstract: Unsaturated polyester (UP)/glass fiber/clay composites were prepared by hand layup method. The effect of clay loading on the morphological and mechanical properties of UP/glass fiber composites was investigated in this study. X-ray diffraction (XRD) was used to characterize the structure of the composites. The mechanical properties of the composites were determined by tensile, flexural, unnotched Charpy impact and fracture toughness tests. XRD results indicated that the exfoliated structure was found in the composite containing 2 wt% of clay while the intercalated structure was obtained in the composite with 6 wt% of clay. The tensile strength, flexural strength, and flexural modulus of the composites were increased in the presence of clay. The optimum loading of clay in the UP/glass fiber composites was attained at 2 wt%, where the improvement in in tensile strength, flexural strength, and flexural modulus was approximately 13, 21, and 11%, respectively. On the other hand, the highest values in impact toughness and fracture toughness were observed in the composites with 4 wt% of clay.
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TL;DR: It was found that the addition of clay into the chitosan improved significantly the tensile strength and tensile modulus and the thermal stability of the ch itosan was significantly enhanced by the presence of clay and glycerol.
55 citations
TL;DR: In this paper, ZnO nanoparticles were disseminated in epoxy/polyaniline mixture using mechanical stirring and sonication with acetone as a facilitator for mixing, and the effects of ZnOs on mechanical and thermal properties of Epoxy/PANI were studied.
41 citations
TL;DR: In this paper, the use of nanoclay increased the mechanical properties of fabricated composite composites and increased the resistance to wear of epoxy resins by varying the weight percentages (wt%).
Abstract: The work targets to fabricate and characterize “nanoclay–epoxy composites” (NECs) by varying weight percentages (wt%) of nanoclay Mechanical stirrer and sonicator are used to mix nanoclay into epoxy resin The mixture is molded to prepare specimens in accordance with ASTM standards The addition of nanoclay increased the mechanical properties of fabricated composites Scanning Electron Microscopy (SEM) images revealed the causes of specimen failure Four factors viz, nanoclay wt%, speed, load, and time at three levels are considered a wear test on a pin-on-disc machine The design of experiments (Taguchi design) is applied for the experimentation, and analysis of variance is established through Minitab 19 software Results revealed that the nanoclay addition improved the resistance to wear of epoxy
29 citations
TL;DR: In this paper, the effect of nanoclay content on the mechanical and morphological behavior of S-glass fiber, reinforced in polyester with Nanoclay as filler was analyzed.
Abstract: Composite materials play a vital role in many industrial applications. Researchers are working on fabrication of new composite materials worldwide to enhance the applicability of these materials. In view of this, the objective of the present work is to analyze the effect of nanoclay content on the mechanical and morphological behavior of S-glass fiber, reinforced in Polyester with nanoclay as filler. Five different types of composites are fabricated by hand layup technique using 0 wt% nanoclay,1 wt% nanoclay, 3 wt % nanoclay, 5 wt% nanoclay and 7 wt% nanoclay with 40% wt fiber, and polyester. The results of the study show that the incorporation of nanoclay has a significant effect on the mechanical behavior of composites. The optimum loading of clay in the Polyester /glass fiber composites was attained at 3wt%, where the improvement in tensile and bending properties was seen.
29 citations
01 Oct 2017
TL;DR: In this paper, the effect of nano clay filler on the mechanical and morphological properties of Napier/epoxy composites was investigated and the results revealed that flexural strength and flexural modulus increased when added to the epoxy matrix.
Abstract: The effect of nano clay filler on the mechanical and morphological properties of Napier/epoxy composites was investigated. Neat, 2 wt%, 3 wt%, 4 wt% and 5 wt% of Montmorillonite (MMT) nano clay filled Napier/epoxy composites were fabricated by vacuum infusion technique. These specimens were tested in the three points bending according to the ASTM D790. The flexural stress-strain curve, flexural strength, flexural modulus and strain to failure were then discovered based on the flexural test results. The results revealed that flexural strength and flexural modulus increased when a particular amount of nano clay was added to the epoxy matrix. 3 wt% of nano clay filler yielded the highest flexural strength with an improvement of 163% when compared to the neat Napier/epoxy composites. Moreover, a maximum of 180% increases in flexural modulus was registered at 5 wt% of nano clay filler. The enhanced properties of nano clay filled composites were highly achieved due to better dispersion and distribution of nano clay in the epoxy resin as well as an increase on the interfacial bonding. Using Scanning Electron Microscopy (SEM), morphological analysis was conducted to observe the fracture surfaces of the specimens after the flexural test. Overall, the presence of nano clay filler loading with a range of 3 wt% to 5 wt% in the Napier/epoxy composites shows the significant improvement in mechanical and morphological properties.
21 citations
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TL;DR: A review of the academic and industrial aspects of the preparation, characterization, materials properties, crystallization behavior, melt rheology, and processing of polymer/layered silicate nanocomposites is given in this article.
6,343 citations
"Effect of Clay Addition on Mechanic..." refers background in this paper
...This may be attributed to the high modulus clay particles and to the strong interfacial interaction between the polymer matrix and clay as a result of the formation of exfoliated structure [18]....
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TL;DR: In this article, a review of polymer-layered silicate nanocomposites is presented, where the polymer chains are sandwiched in between silicate layers and exfoliated layers are more or less uniformly dispersed in the polymer matrix.
Abstract: This review aims at reporting on very recent developments in syntheses, properties and (future) applications of polymer-layered silicate nanocomposites. This new type of materials, based on smectite clays usually rendered hydrophobic through ionic exchange of the sodium interlayer cation with an onium cation, may be prepared via various synthetic routes comprising exfoliation adsorption, in situ intercalative polymerization and melt intercalation. The whole range of polymer matrices is covered, i.e. thermoplastics, thermosets and elastomers. Two types of structure may be obtained, namely intercalated nanocomposites where the polymer chains are sandwiched in between silicate layers and exfoliated nanocomposites where the separated, individual silicate layers are more or less uniformly dispersed in the polymer matrix. This new family of materials exhibits enhanced properties at very low filler level, usually inferior to 5 wt.%, such as increased Young’s modulus and storage modulus, increase in thermal stability and gas barrier properties and good flame retardancy.
5,901 citations
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01 Jan 1976TL;DR: In this article, the authors present an overview of fracture mechanics of engineering materials and examine the role of the transition temperature approach to fracture control in the engineering failure process, as well as various aspects of fracture toughness.
Abstract: DEFORMATION OF ENGINEERING MATERIALS. Tensile Response of Materials. Elements of Dislocation Theory. Slip and Twinning in Crystalline Solids. Strengthening Mechanisms in Metals. High-Temperature Deformation Response of Crystalline Solids. Deformation Response of Engineering Plastics. FRACTURE MECHANICS OF ENGINEERING MATERIALS. Fracture: An Overview. Elements of Fracture Mechanics. Transition Temperature Approach to Fracture Control. Microstructural Aspects of Fracture Toughness. Environment-Assisted Cracking. Cyclic Stress and Strain Fatigue. Fatigue Crack Propagation. Analyses of Engineering Failures. Appendices. Indexes.
3,611 citations
"Effect of Clay Addition on Mechanic..." refers methods in this paper
...The load-displacement curves were recorded and the maximum loads upon fracture were used to determine the KIC value, which is defined by [8]...
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TL;DR: In this paper, the technology involved with exfoliated clay-based nanocomposites and also include other important areas including barrier properties, flammability resistance, biomedical applications, electrical/electronic/optoelectronic applications and fuel cell interests.
2,917 citations
"Effect of Clay Addition on Mechanic..." refers background in this paper
...Clay and carbon nanotubes are the most common used particles as reinforcement materials for polymer nanocomposites [1]....
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...The small amount addition of montmorillonite clay into polymer matrix exhibits unexpected properties including reducing gas permeability, improved solvent resistance, being superior in mechanical properties and thermal stability, and enhanced flame retardant properties [1]....
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TL;DR: The Journal Mission Progress in Polymer Science as mentioned in this paper is devoted to the publication of definitive critical reviews of progress in the research area addressed, supported by relevant citations to the published literature, including a majority of citations to literature of the preceding decade.
1,067 citations