Physical and mechanical properties of dental nanocomposites composed of aliphatic epoxy resin and epoxidized aromatic hyperbranched polymers

2009 ◽  
Vol 30 (2) ◽  
pp. 176-181 ◽  
Author(s):  
Yujie Zhang ◽  
Daohong Zhang ◽  
Chuangye Qin ◽  
Jingwei Xu
Keyword(s):  
Mechanical Properties ◽  
Epoxy Resin ◽  
Physical And Mechanical Properties ◽  
Hyperbranched Polymers

Physical and mechanical properties of triacetate fibre modified with ED-5 epoxy resin

1972 ◽  
Vol 3 (3) ◽  
pp. 303-305
Author(s):  
Z. Yu. Sakalauskas ◽  
Ya. K. Matskevichene ◽  
Yu. I. Baltakite ◽  
I. I. Zdanavichyus
Keyword(s):  
Mechanical Properties ◽  
Epoxy Resin ◽  
Physical And Mechanical Properties ◽  
Triacetate Fibre

Thermo Mechanical behaviour of Phenol Novolac Resin and Unsaturated Polyester Toughened Epoxy using nano Bentonite and Silica Nanoparticles

2020 ◽  
Vol 1 (3) ◽  
pp. 77-83
Keyword(s):  
Mechanical Properties ◽  
Epoxy Resin ◽  
Silica Nanoparticles ◽  
Moisture Absorption ◽  
Unsaturated Polyester ◽  
Physical And Mechanical Properties ◽  
Bending Test ◽  
Mechanical And Thermal Properties ◽  
Novolac Epoxy ◽  
Industrial Needs

Phenol novolac epoxy resin is a polymer matter which its properties can be modified for industrial needs. In this research, nanocomposites of phenol novolac epoxy resin and unsaturated polyester are made nano Bentonite and silica nanoparticles as filler. For this purpose, effect of nanoparticles percent on nanocomposite formation is studied and their physical, mechanical and thermal properties are obtained. The presence of unsaturated polyester in this process forms a cross-link capable of improving the physical and mechanical properties of epoxy resin. Fracture behavior was determined by a SEM device. Moreover, TGA, DSC, impact tests and bending test were applied for data analysis. When process ability is growing, moisture absorption decreases. Fracture toughness was also evaluated in a stoichiometric network. Physical and mechanical properties improve significantly with increasing nanoparticles. The most important reason for using this nanocomposite is its high resistance to corrosion.

Influence of Portland Cement Addition in the Physical and Mechanical Properties of Epoxy Resin

2015 ◽  
Vol 1088 ◽  
pp. 411-414 ◽  
Author(s):  
Francisco Augusto Zago Marques ◽  
Carlos Eduardo G. da Silva ◽  
André Luis Christoforo ◽  
Francisco Antonio Rocco Lahr ◽  
Túlio Hallak Panzera ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Compressive Strength ◽  
Composite Material ◽  
Portland Cement ◽  
Physical Properties ◽  
Epoxy Resin ◽  
Modulus Of Elasticity ◽  
Epoxy Matrix ◽  
Physical And Mechanical Properties ◽  
Response Variable

This research evaluated, with the of the analyses of variance (ANOVA), a composite material based on epoxy matrix phase reinforced with Portland cement (CP-II) particles (0%wt [100%wt of resin], 20%wt, 40%wt, 60%wt). The response-variable investigated were modulus of elasticity (E) and compressive strength (S), bulk density (ρB), apparent density (ρA) and porosity (P). The highest values of the modulus of elasticity were provided from the composites manufactured with 40wt% of cement addition. The inclusion of 60% of cement implies in a reduction in the mechanical properties when compared with the results of the composite manufactured with 40% of cement. For the physical properties, the gradually inclusion of cement provides increasing in the density of the composites, and reduce the porosity of the materials manufactured.

Resin-Wood Particulate Composite Reinforced with Piassava Fibre

2015 ◽  
Vol 1088 ◽  
pp. 415-418
Author(s):  
André Luis Christoforo ◽  
Francisco Antonio Rocco Lahr ◽  
Cristiane Inácio de Campos ◽  
Elen Aparecida Martines Morales ◽  
Juliana Cortez Barbosa ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Epoxy Resin ◽  
Hybrid Composite ◽  
Mass Fraction ◽  
Physical And Mechanical Properties ◽  
Particulate Composite ◽  
Modulus Of Rupture ◽  
Casting Method ◽  
Wood Sawdust ◽  
The One

These research objectives the development and evaluation of physical and mechanical properties of a hybrid composite manufactured epoxy resin reinforced by Eucalipto sp. wood sawdust and treated piassava fibers. The evaluated properties were modulus of elasticity (MOE) and modulus of rupture (MOR) in static bending, water absorption after 24 hours, porosity and apparent density. Three factors with two levels was evaluated: thickness (3 mm and 4 mm), volumetric resin fraction (45% and 50%) and the use or not of laminate piassava fibers reinforcement, leading to a factorial design of 23 type. Were manufactured four panels, two with 50% and two with 55% of resin, using casting method. For the physical and mechanical properties obtained, the better conditions were the one that uses 50% of epoxy resin, 55% sawdust mass fraction and with the use of laminated piassava fibers reinforcement. The thickness was not statistically significant in obtaining the properties evaluated.

Properties of Epoxy-Diane Composites Modified by Techno-Genic Fillers

2020 ◽  
Vol 299 ◽  
pp. 84-88
Author(s):  
N.Yu. Kiryushina ◽  
A.Yu. Semeykin
Keyword(s):  
Mechanical Properties ◽  
Composite Materials ◽  
Epoxy Resin ◽  
Physical And Mechanical Properties ◽  
Epoxy Polymers

The article proposes a method for producing epoxy polymers, based on epoxy resin ED-20, modified with slag from the JSC “Oskol Electrometallurgical Plant”. It has been established that it is possible to regulate physical and mechanical properties of composite materials by introducing filler, which will allow expanding its areas of application.

Effects of Caeser Weed (Urena lobata L ) Fibre, Afara (Terminalia superba) and Mahogany (Khaya senegalensis) Dusts on some Physical and Mechanical Properties of Epoxy Resin

2012 ◽  
Vol 7 ◽  
pp. 21-33
Author(s):  
Ishaya Musa Dagwa ◽  
O. Ojo
Keyword(s):  
Mechanical Properties ◽  
Water Absorption ◽  
Epoxy Resin ◽  
Tensile Modulus ◽  
Physical And Mechanical Properties ◽  
Shore Hardness ◽  
Fibre Filler ◽  
Standard Procedures ◽  
The Impact ◽  
Positive Effect

In Recent Times, Environmental Concerns Arising from Pollution, Global Warming and Waste Management Have Led to the Generation of Interest in the Use of Environmentally Friendly Materials, Especially, Biological Materials such as Natural Fibres and Particulates in Composite Materials Manufacture. in this Work, Natural Fillers (Afara-Mahogany Particulates of 150µm) and Fibre (Caesar Weed Fibre of 5mm Length) Were Mixed with Epoxy Resin at the Various Fibre/filler Weight Percentages as Follows: 2%, 4%, 6%, 8% and 10% with Random Fibre Orientations. some Physical and Mechanical Properties of the Composite Were Determined Using Standard Procedures. Ninety (90) Wt% of Epoxy Resin Mixed with 10 Wt% for each of the Following: Caeser Weed Fibre, Afara and Mahogany, Improved the Tensile Modulus by 2652.6%, 321.37%, and 129.73% and the Impact Strength by 162.7%, 133.9% and 15.25%, Respectively. Also, Composites Density Reduced by 26.26%, 3.03%, and 3.03%, and its Hardness too Reduced by 5.41%, 1.35%, and 4.05%, Respectively. Meanwhile, the Water Absorption Were 4.9%, 2.79%, and 4.12% for 10wt% of Caeser Weed Fibre, Afara and Mahogany, Respectively and 90wt% Epoxy Resin. Therefore, Caeser Weed Fibre Had the Greatest Positive Effect on the Tensile Strength, Impact Energy Absorbed and Density. however, Afara-Epoxy Composite Had the Least Water Absorption and Higher Shore Hardness Value than Mahogany-Epoxy and Caeser Weed Fibre-Epoxy Composites.

scholarly journals Manufacture and Characterization Physical and Mechanical Properties of Bioveneer Based Ark Clam Shells Composite

2019 ◽  
pp. 132-140
Author(s):  
Evi Mariani M ◽  
Kerista Tarigan ◽  
Timbangen Sembiring
Keyword(s):  
Mechanical Properties ◽  
Epoxy Resin ◽  
Epoxy Resins ◽  
Raw Materials ◽  
Brinell Hardness ◽  
Physical And Mechanical Properties ◽  
Second Step ◽  
Compression Method ◽  
Hydroxyapatite Powder ◽  
Dry Mixing

Composite materials have been created for the applications of dental veneer from a mixture of raw materials : hydroxyapatite (HAp) powder from ark clam shells and epoxy resins by cold compression method with variations of composition hydroxyapatite (HAp) powder : epoxy resin (75 : 25)%wt, (80 : 20)%wt, (85 : 15)%wt, (90 : 10)%wt, dan (95 : 5)%wt. Sampling is created in three steps. The first step of ark clam shells powder is treated by smoothing it with a particle size of 200 mesh and heated at 900oC for 2 hours after it had been synthesized into hydroxyapatite (HAp) powder. The second step of the filler (hydroxyapatite powder) is mixed with dry mixing and then mixed with epoxy resin as a matrix. The third step of the homogeneous mixture is then inserted into the mold and compacted by heat to be more dense with pressure of 300 MPa or 3 ton held for 5 minutes at 27°C. The characterization results showed that the optimum composition of hydroxyapatite powder: epoxy resin (75 : 25)%wt with density value 0,1185 x 103 kg/m3, water absorption 1,163%, composed of -PO4 (phosphate), -CO3 (carbonate) and HOH groups. Mechanical properties with fracture strength 116 MPa, tensile strength 66,12 MPa, modulus of elasticity 3297,99 MPa and brinell hardness 75,87 HBR whose characterization results have met the conventional dental veneer standards.

Cutting forces during drilling and selected physical and mechanical properties of the finish coating based on epoxy resin

2020 ◽  
Vol 111 ◽  
pp. 106-115
Author(s):  
Barbara Białowąs ◽  
Karol Szymanowski
Keyword(s):  
Mechanical Properties ◽  
Epoxy Resin ◽  
Cutting Forces ◽  
Uv Light ◽  
Physical And Mechanical Properties ◽  
Cutting Resistance ◽  
Wood Processing ◽  
Axial Forces ◽  
Epoxy Resin Coating ◽  
Torque Values

Abstract: Cutting forces during drilling and selected physical and mechanical properties of the finish coating based on epoxy resin. Paper presents selected tests of epoxy resin coating applied to American walnut wood (Juglans nigra L.). The aim of the study was to assess the machinability of wood flooded with resin during drilling. The axial forces and torque values were adopted for the machinability criteria. The idea of the research was the thesis questioning the possibility of processing epoxy resin coatings with the application of tools and parameters used during wood processing. In addition, the influence of UV light on the obtained coating was examined and abrasion tests were carried out. It was found the resin changes its colour under the influence of UV radiation, but the change is imperceptible to an average observer. Epoxy resin is characterized by low abrasion resistance compared to commonly used paint and varnish coatings. Although solid resin is characterized by high cutting resistance while drilling, the force values do not exceed the commonly cut wood-based materials.

scholarly journals Manufacture and Characterization of Composite Based on Sugar Palm Stem Powder Reinforced by Matrix Polyester Resin, Epoxy Resin and Polyurethane Resin

2019 ◽  
pp. 571-577
Author(s):  
Muhammadin Hamid ◽  
Timbangen Sembiring ◽  
Kurnia Sembiring
Keyword(s):  
Mechanical Properties ◽  
Flexural Strength ◽  
Epoxy Resin ◽  
Mass Fraction ◽  
Polyester Resin ◽  
Physical And Mechanical Properties ◽  
Conventional Technique ◽  
Optimum Number ◽  
Polyurethane Resin

Composite based on sugar palm stem powder has been made through conventional technique of mold and press from the sugar palm stem powder reinforced by matrix polyester resin, epoxy resin, and polyurethane resins. The composition of sugar palm stem powder were varied with 2;4;6;8 and 10% wt mass fraction also the 90;92;94;96 and 98 % wt mass fraction are enhanced by the polyester resin, epoxy resin and polyurethane resins in 300 MPa pressure treated with temperature of 120?C for polyurethane resin and temperature of 70?C for polyester resin and epoxy resin for 20 minutes. The test result of physical and mechanical properties generates 1.19 gr/cm³ of the density optimum number, 1.83% porosity, 2.83% water absorption, 80.47 kJ/m² impact strength, 80.42 MPa flexural strength, 5.95 MPa tensile strength and the result of SEM to see the surface structure of the sample which is homogenous. The study shows the mechanical properties and physical properties which meet the Standard JIS A 5905 : 2003, that is flexural strength >32 MPa and 0.3 – 1.3 gr/cm3 density.

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