Polypyrrole doped epoxy resin nanocomposites with enhanced mechanical properties and reduced flammability

2015 ◽  
Vol 3 (1) ◽  
pp. 162-176 ◽  
Author(s):  
Xi Zhang ◽  
Xingru Yan ◽  
Jiang Guo ◽  
Zhen Liu ◽  
Dawei Jiang ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Tensile Strength ◽  
Crack Propagation ◽  
Epoxy Resin ◽  
Shear Bands ◽  
Epoxy Resin Nanocomposites

As well as limiting the crack propagation, polypyrrole nanofibers further initiated shear bands in epoxy to give a higher tensile strength than polypyrrole nanospheres.

Mechanical Properties and Microstructure of Aramid/Al2O3/Epoxy Resin Laminated Composites

2008 ◽  
Vol 55-57 ◽  
pp. 389-392
Author(s):  
Supreyak Kumfu ◽  
Wim Nhuapeng ◽  
Wandee Thamjaree ◽  
Tawee Tunkasiri
Keyword(s):  
Mechanical Properties ◽  
Tensile Strength ◽  
Epoxy Resin ◽  
Laminated Composites ◽  
Scratch Resistance ◽  
Resin Matrix ◽  
Sem Images ◽  
Laminate Composites ◽  
Al2o3 Powder ◽  
Casting Technique

Aramid/Al2O3/epoxy resin laminated composites were fabricated using ultrasonic mixing and casting technique. This novo material could be exhibited to the ideal mechanical properties such as high tensile strength, hardness, flexural strength and lightweight which may be used to replace metal parts in vehicles. Moreover, Al2O3 powder was mixed to epoxy resin to improve the scratch resistance. To improve the bending force and interaction between Al2O3 powder phase and epoxy resin phase, the ultrasonic mixing was used for fabricating these laminate composites. The physicals and mechanical properties such as density, hardness, impact test, wear resistance and tensile strength of the composites samples were investigated. It was found that the amounts of percent by volume of the Al2O3 have affected the properties of the laminated composites. Furthermore, microstructures of specimens were also investigated by scanning electron microscope (SEM). From the results, SEM images showed good distribution and adhesion between reinforced phase and epoxy resin matrix phase.

Effect of reactive and non-reactive diluents on thermal and mechanical properties of epoxy resin

2017 ◽  
Vol 30 (10) ◽  
pp. 1159-1168 ◽  
Author(s):  
Animesh Sinha ◽  
Nazrul Islam Khan ◽  
Subhankar Das ◽  
Jiawei Zhang ◽  
Sudipta Halder
Keyword(s):  
Mechanical Properties ◽  
Thermal Stability ◽  
Fracture Toughness ◽  
Tensile Strength ◽  
Polyethylene Glycol ◽  
Epoxy Resin ◽  
Mechanical Performance ◽  
Thermal And Mechanical Properties ◽  
Minor Variation ◽  
Reactive Diluents

The effect of reactive (polyethylene glycol) and non-reactive (toluene) diluents on thermal and mechanical properties (tensile strength, hardness and fracture toughness) of diglycidyl ether of bisphenol A epoxy resin (cured by triethylenetetramine) was investigated. The thermal stability and mechanical properties of the epoxy resin modified with reactive and non-reactive diluents at different wt% were investigated using thermo-gravimetric analyser, tensile test, hardness test and single-edge-notched bend test. A minor variation in thermal stability was observed for epoxy resin after addition of polyethylene glycol and toluene at 0.5 wt%; however, further addition of reactive and non-reactive diluents diminished the thermal stability. The addition of 10 wt% of polyethylene glycol in epoxy resin significantly enhances the tensile strength (∼12%), hardness (∼14%) and fracture toughness (∼24%) when compared to that of neat epoxy resin. In contrast, major drop in mechanical performance was observed after addition of toluene in epoxy. Furthermore, fracture surfaces were investigated under field emission scanning electron microscope to elucidate the failure mechanism.

FDM Prototype Experimental Research of Processing Parameter Optimization to Achieve Higher Tensile Stress

2015 ◽  
Vol 220-221 ◽  
pp. 767-773 ◽  
Author(s):  
Ilmars Brensons ◽  
Svetlana Polukoshko ◽  
Andris Silins ◽  
Natalija Mozga
Keyword(s):  
Mechanical Properties ◽  
Tensile Strength ◽  
Epoxy Resin ◽  
Fused Deposition Modeling ◽  
Low Cost ◽  
Rapid Prototype ◽  
Layer By Layer ◽  
Processing Parameter ◽  
Practical Applications ◽  
Fused Deposition

Fused Deposition Modeling (FDM) is one of most common ways of rapidly producing a part. Heated material (most commonly – plastic) is used to extrude it through a nozzle and deposit on a surface layer by layer until the part is fully produced. FDM has become one of the most popular in rapid production area due to its low cost, available materials and versatility.Due to fact that part is made layer by layer and each additional layer is deposited on top of a layer that is already a little below material melting point, part maintains different mechanical properties in various directions. These varying mechanical properties affect the part usability in practical applications. Critical point is tensile strength.The objective of this paper is to research optimal processing parameters for FDM prototyping to improve tensile strength. Several rapid prototype models (tensile test samples) with various geometry of longitudinal reinforcement channels were built. As reinforcing material, the epoxy resin was used, because it has higher tensile strength when solid and allows filling channels with various geometry. All made samples were tested for tensile strength. Experiment was carried out to confirm the effectiveness of this approach. From the results, it is found how different amount of epoxy resin affects part tensile strength.

scholarly journals Preparation and properties of (epoxy resin)/(nylon 6,6 oligomer) blends

2009 ◽  
Vol 3 (2) ◽  
pp. 111-115
Author(s):  
Jason Bragg ◽  
◽  
Alberto Alvarez-Castillo ◽  
Monica Trejo-Duran ◽  
Victor Castano ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Tensile Strength ◽  
Epoxy Resin ◽  
Considerable Increase ◽  
Flexural Modulus ◽  
Strength Testing ◽  
Curing Agent ◽  
Maximum Increase ◽  
Maximum Value ◽  
Nylon 6,6

A series of polymer alloys based on different compositions of Nylon 6,6 oligomers (NYL66Oґs) and epoxy resin have been prepared. The oligomer was extracted from the waste residues of the industrial production of nylon 6,6 and was dissolved in the epoxy resin. The mixture was crosslinked at 333 K using dodecenylsuccinic anhydre (DDSA) as a curing agent. The tensile strength and flexural modulus were found to increase with the addition of NYLO66O up to a maximum value of 2 wt % oligomer content. Both, the tensile and impact strength show a maximum increase due to the addition of 35 wt % NYLO66O. The compressive strength testing revealed a considerable increase, up to 87 %, over that of the neat epoxy with the addition of 1 wt % NYLO66O. An interesting relationship between the mechanical properties and the developed morphology of the blends has been found.

scholarly journals Mechanical Properties of Kevlar Fibre Reinforced with Banana Fibre and Aluminium Mesh using Epoxy Resin

2020 ◽  
Vol 8 (5) ◽  
pp. 447-450
Keyword(s):  
Mechanical Properties ◽  
Tensile Strength ◽  
Composite Material ◽  
Epoxy Resin ◽  
Tensile Modulus ◽  
Natural Fibre ◽  
Textile Fibre ◽  
Aramid Fibres ◽  
Banana Fibre ◽  
Conveyor Belts

Kevlar fibres are para aramid fibres rather than Meta-Aramid structure of Nomex. These fibres have high tensile strength, tensile modulus and heat resistance .Kevlar is about five times lighter than steel in terms of the same tensile strength. In fact, it is the strongest textile fibre available today. It is therefore used in Radial tyres, Conveyor belts, Aircraft parts and mainly used in Ballistics and Frictional products. The aim of this investigation is to increase the mechanical properties of composite material of Kevlar fibre. The Kevlar fibre is reinforced with the banana fibre,which is a Natural Fibre and Aluminium Mesh using Epoxy resin. The Mechanical Properties of Newly formed Composite material using Kevlar Fibre is improved and find its application in a higher position while comparing to the Kevlar Fibre

scholarly journals Tailoring the Mechanical Performance of Epoxy Resin by Various Nanoparticles

2008 ◽  
Vol 16 (8) ◽  
pp. 527-533 ◽  
Author(s):  
Sheng Liu ◽  
Hui Zhang ◽  
Zhong Zhang ◽  
Taihua Zhang ◽  
Stephan Sprenger
Keyword(s):  
Mechanical Properties ◽  
Fracture Toughness ◽  
Tensile Strength ◽  
Epoxy Resin ◽  
Silica Nanoparticles ◽  
Mechanical Performance ◽  
Sol Gel ◽  
Nanoparticle Dispersion ◽  
Nanosilica Particles ◽  
The Cost

Flexible organic elastomeric nanoparticles (ENP) and two kinds of rigid inorganic silica nanoparticles were dispersed respectively into a bisphenol-A epoxy resin in order to tailor and compare the performance of mechanical properties. It was found that the well-dispersed flexible ENP greatly enhanced the toughness of the epoxy with the cost of modulus and strength. Comparatively, the rigid silica nanoparticles improved Young's modulus, tensile strength and fracture toughness simultaneously. Both fumed and sol-gel-formed nanosilica particles conducted similar results in reinforcing the epoxy resin, although the latter exhibited almost perfect nanoparticle dispersion in matrix. The toughening mechanisms of nanocomposites were further discussed based on fractographic analysis.

scholarly journals Improving Mechanical Properties of Thermoset Biocomposites by Fiber Coating or Organic Oil Addition

2015 ◽  
Vol 2015 ◽  
pp. 1-7 ◽  
Author(s):  
Truc T. Ngo ◽  
James G. Kohl ◽  
Tawni Paradise ◽  
Autumn Khalily ◽  
Duane L. Simonson
Keyword(s):  
Mechanical Properties ◽  
Tensile Strength ◽  
Epoxy Resin ◽  
Polymer Matrix ◽  
Modulus Of Elasticity ◽  
Epoxy Matrix ◽  
Linseed Oil ◽  
Hemp Fibers ◽  
Fiber Coating ◽  
Strength And Ductility

Two different thermoset biocomposite systems are experimented in this study with the hope to improve their mechanical properties. Fiberglass and hemp, in form of fabrics, are used to reinforce the thermoset polymer matrix, which includes a traditional epoxy resin and a linseed oil-based bioresin (UVL). The fiber/polymer matrix interface is modified using two different approaches: adding a plant-based oil (pine or linseed) to the polymer matrix or coating the fibers with 3-(aminopropyl)triethoxysilane (APTES) prior to integrating them into the polymer matrix. Epoxy resin is cured using an amine-based initiator, whereas UVL resin is cured under ultraviolet light. Results show that hemp fibers with APTES prime coat used in either epoxy or UVL matrix exhibit some potential improvements in the composite’s mechanical properties including tensile strength, modulus of elasticity, and ductility. It is also found that adding oil to the epoxy matrix reinforced with fiberglass mostly improves the material’s modulus of elasticity while maintaining its tensile strength and ductility. However, adding oil to the epoxy matrix reinforced with hemp doubles the material’s ductility while slightly reducing its tensile strength and modulus of elasticity.

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