scholarly journals The effect of hygrothermal fatigue on physical/mechanical properties and morphology of neat epoxy resin and graphite/epoxy composite

1985 ◽  
Vol 30 (6) ◽  
pp. 2527-2549 ◽  
Author(s):  
Jovan Mijović ◽  
King-Fu Lin
Keyword(s):  
Mechanical Properties ◽  
Epoxy Resin ◽  
Epoxy Composite ◽  
Neat Epoxy

scholarly journals Dielectric spectroscopy and structural characterization of nano-filler-loaded epoxy resin

2021 ◽  
pp. 2150011
Author(s):  
S. G. Thakor ◽  
V. A. Rana ◽  
H. P. Vankar ◽  
T. R. Pandit
Keyword(s):  
Mechanical Properties ◽  
Epoxy Resin ◽  
Epoxy Composite ◽  
Structural Information ◽  
Epoxy Composites ◽  
Neat Epoxy ◽  
Frequency Range ◽  
Additional Information ◽  
Lcr Meter

This work outlines the characterization of epoxy resin [Bisphenol A-(epichlorhydrin): epoxy] and hardener [[Formula: see text](3-dimethylaminopropyl)-1,3-propylenediamine] with various inorganic nano-fillers. Dielectric characterizations of epoxy, hardener, neat epoxy (epoxy + hardener) and nano-epoxy (nano-filler + neat epoxy) composites loaded with 1 wt.% of inorganic nano-fillers (SiO2, Al2O3, TiO2 and ZnO) were carried out using precision LCR meter, over the frequency range of 1 kHz–2 MHz at a constant temperature of 300.15 K. The structural information of nano-fillers, neat epoxy and nano-epoxy composites was understood by Fourier transform infrared spectroscopy and by XRD. Moreover, hardness and shear strength (shear punch) were also determined in order to gain additional information about the mechanical properties of epoxy composite. Influence of inorganic nano-fillers on the dielectric properties, structural chemistry and mechanical properties of neat epoxy composite is discussed thoroughly in this study.

MECHANICAL PROPERTIES OF EPOXY RESIN BASED GRAPHENE NANO PARTICLES COMPOSITE

2020 ◽  
Vol 15 (4) ◽  
Author(s):  
Durgaprasad Kollipara ◽  
Prabhakar Gope VNB ◽  
Raja Loya
Keyword(s):  
Mechanical Properties ◽  
Epoxy Resin ◽  
Epoxy Composite ◽  
Hardness Test ◽  
Industrial Applications ◽  
Mechanical Tests ◽  
Nano Particles ◽  
Potential Candidate ◽  
Matrix Composites ◽  
Reinforcing Material

Composites have tremendous applicability due to their excellent capabilities. The performance of composites mainly depends on the reinforcing material applied. A Graphene nanoparticle (GNP) is successful as an efficient reinforcing material due to its versatile as well as superior properties. Even at very low content, graphene can dramatically improve the properties of polymer and metal matrix composites. In this paper the effects of GNP on composites based on epoxy resin were analyzed. Different contents of GNP (0 – 4.5 vol. %) were added to the epoxy resin. The GNP/epoxy composite was fabricated under room temperature. Mechanical tests result such as tensile, flexural and hardness test show enhancements of the mechanical properties of the GNP/epoxy composite. The experimental results clearly show an improvement in Young’s modulus, tensile strength, and hardness as compared to pure epoxy. The results of this research are strong evidence for GNP/epoxy composites being a potential candidate for use in a variety of industrial applications, especially for automobile parts, aircraft components, and electronic parts such as super capacitors, transistors, etc.

Mechanical Properties of Electrospun Carbon Nano Fiber (ECNF)/Epoxy Nanocomposites

2007 ◽  
Author(s):  
Darunee Aussawasathien ◽  
Erol Sancaktar
Keyword(s):  
Mechanical Properties ◽  
Aspect Ratio ◽  
Epoxy Resin ◽  
Carbon Nanofiber ◽  
Mechanical Analysis ◽  
Short Fiber ◽  
Neat Epoxy ◽  
Epoxy Nanocomposites ◽  
Cure Reaction ◽  
Fiber Aspect Ratio

Electrospun polyacrylonitrile (PAN) fiber precursor based Carbon Nanofiber (CNF) mats were produced and impregnated with epoxy resin. The mechanical properties of as-prepared nanofibers in the mat and short fiber filled epoxy nanocomposite forms were determined to demonstrate the effect of fiber aspect ratio and interconnecting network on those properties. Our experimental results reveal that epoxy nanocomposites containing Electrospun Carbon Nano Fibers (ECNF) with high fiber aspect ratio and high interconnecting network in the non-woven mat form yield better mechanical properties than those filled with short ECNFs. The ECNF mat in epoxy nanocomposites provides better homogeneity, more interlocking network, and easier preparation than short ECNFs. Mechanical properties of ECNF mat-epoxy nanocomposites, which we obtained using tensile and flexural tests, such as stiffness and modulus increased, while toughness and flexural strength decreased, compared to the neat epoxy resin. Dynamic Mechanical Analysis (DMA) results showed, higher modulus for ECNF mat-epoxy nanocomposites, compared to those for neat epoxy resin and short ECNF-epoxy nanocomposites. The epoxy nanocomposites had high modulus, even though the glass transition temperature, Tg values dropped at some extents of ECNF mat contents when compared with the neat epoxy resin. The cure reaction was retarded since the amount of epoxy and hardener decreased at high ECNF contents together with the hindering effect of the ECNF mat to the diffusion of epoxy resin and curing agent, leading to low crosslinking efficiency.

SYNTHESIS OF HYBRID SiC/SiO2 NANOPARTICLES AND THEIR POLYMER NANOCOMPOSITES

2013 ◽  
Vol 12 (02) ◽  
pp. 1350008 ◽  
Author(s):  
TARIG A. HASSAN ◽  
VIJAYA K. RANGARI ◽  
FREDRIC BAKER ◽  
SHAIK JEELANI
Keyword(s):  
Mechanical Properties ◽  
Epoxy Resin ◽  
High Intensity ◽  
Thermo Gravimetric Analysis ◽  
Neat Epoxy ◽  
Hybrid Nanoparticles ◽  
Gravimetric Analysis ◽  
Sonochemical Method ◽  
Thermal And Mechanical Properties ◽  
Sic Nanoparticles

In the present investigation, silicon carbide (β-SiC) nanoparticles (~ 30 nm) were coated on silicon dioxide (SiO2) nanoparticles (~ 200 nm) using sonochemical method. The resultant hybrid nanoparticles were then infused into SC-15 epoxy resin to enhance the thermal and mechanical properties of SC-15 epoxy for structural application. To fabricate an epoxy-based nanocomposite containing SiC/SiO2 hybrid nanoparticles, we have opted a two-step process. In the first step, the silica nanoparticles were coated with SiC nanoparticles using high intensity ultrasonic irradiation. In a second step, 1 wt.% of as-prepared SiC/SiO2 particles were dispersed in epoxy part-A (diglycidylether of bisphenol A) using a high intensity ultrasound for 30 min at 5°C. The part-B (cycloaliphatic amine hardener) of the epoxy was then mixed with part-A- SiC/SiO2 mixture using a high-speed mechanical stirrer for 10 min. The SiC/SiO2 /epoxy resin mixture was cured at room temperature for 24 h. The SiC nanoparticles coating on SiO2 was characterized using X-ray diffraction (XRD) and high resolution transmission electron microscope (TEM). The as-prepared nanocomposite samples were characterized using thermo gravimetric analysis (TGA) and differential scanning calorimeter (DSC). Compression tests have been carried out for both nanocomposite and neat epoxy systems. The results indicated that 1 wt.% (SiC) + (SiO2) loading derived improvements in both thermal and mechanical properties when compared to the neat epoxy system.

Mechanical Properties of Oil Palm Empty Fruit Bunch Fibers-Cast Alloy Composite Using Three Point Bending Test

2015 ◽  
Vol 761 ◽  
pp. 374-379
Author(s):  
Mohammad Hafizudin ◽  
Taufik Roni Sahroni ◽  
Mohd Razali Muhamad ◽  
Nurul Farah ◽  
M.R. Kamal
Keyword(s):  
Mechanical Properties ◽  
Epoxy Resin ◽  
Metal Matrix Composite ◽  
Matrix Composite ◽  
Oil Palm ◽  
Metal Matrix ◽  
Epoxy Composite ◽  
Bending Test ◽  
Maximum Force ◽  
Empty Fruit Bunch

This paper presents the mechanical properties of oil palm empty fruit bunch (OPEFB) fiber/epoxy resin reinforced cast LM6 (aluminum based) alloy composites. The metal matrix composite was fabricated by incorporating OPEFB/epoxy resin using mono filaments concept in the as cast LM6 alloys. Three different diameters (10, 12 and 14 mm) of the maximum force of metal matrix composite materials along with controlled sample (cast LM6 alloy + OPEFB/epoxy resin) were determined from three point bend testing. Test results showed that maximum force of mixture between OPEFB fibers composite and cast LM6 alloy for metal matrix composite are higher than that of cast LM6 alloy. Thus the utilization of OPEFB/epoxy composite as mono filaments in metal matrix composite can be significant in improving the strength of the cast LM6 alloy. Beside that increasing the diameter size of OPEFB/epoxy composite will reduce the weight of metal matrix composite (cast LM6 + OPEFB/epoxy composite).

scholarly journals Sensing Performance and Mechanical Properties of Buckypaper Impregnated with Epoxy Resin

Nanomaterials ◽  
2020 ◽  
Vol 10 (11) ◽  
pp. 2258
Author(s):  
Shiuh-Chuan Her ◽  
Wei-Chun Hsu
Keyword(s):  
Mechanical Properties ◽  
Epoxy Resin ◽  
Epoxy Composite ◽  
Strain Sensitivity ◽  
Piezoresistive Effect ◽  
Thermogravimetric Analyzer ◽  
Structural Applications ◽  
Overall Performance ◽  
Sensing Performance ◽  
Better Than

Buckypaper consisting of a carbon nanotube (CNT) sheet has a great potential for sensing and structural applications due to the exceptional piezoresistive and mechanical properties of CNTs. In this work, buckypaper was impregnated with the epoxy resin to improve the fragility and handling capability. The mechanical properties of the buckypaper/epoxy composite were determined by the tensile and nanoindentation tests. A thermogravimetric analyzer (TGA) was used to evaluate the thermal stability. Strain and temperature sensing performances of the buckypaper/epoxy composite based on the piezoresistive effect were investigated using a meter source. Experimental results indicated that the elastic modulus and ultimate strength of the buckypaper/epoxy composite were increased by 82% and 194%, respectively, in comparison with the pristine buckypaper, while the strain and temperature sensitivities were decreased by 33% and 0.2%, respectively. A significant increase of the tensile strength accompanied with a moderate decrease of the strain sensitivity demonstrates that the overall performance of buckypaper/epoxy composite is better than that of pristine buckypaper.

Mechanical Properties of Graphene Nanoplatelets-Reinforced Epoxy Grout in Repairing Damaged Pipelines

2019 ◽  
Vol 962 ◽  
pp. 242-248
Author(s):  
Lim Kar Sing ◽  
Libriati Zardasti ◽  
Norhazilan Md Noor ◽  
Nordin Yahaya
Keyword(s):  
Mechanical Properties ◽  
Epoxy Resin ◽  
Tensile Tests ◽  
Graphene Nanoplatelets ◽  
Neat Epoxy ◽  
Frp Composites ◽  
Reinforced Polymer ◽  
Noticeable Improvement ◽  
Fibre Reinforced Polymer ◽  
Flexural Tests

The use of Fibre Reinforced Polymer (FRP) composites together with infill grout has been proven effective for repairing damaged steel pipelines. This paper study the mechanical properties of epoxy grouts where an amount of 0.2% and 0.8% of graphene nanoplatelets particles were added to commercial epoxy resin to evaluate their behaviour regarding neat epoxy resin. Compressive tests, tensile tests and flexural tests were conducted to study the effect of graphene nanoplatelets towards neat epoxy resin. By comparing graphene-modified grouts and neat epoxy grout, there is no increment of strength under compression and tensile test due to poor dispersion of graphene nanoplatelets. Nevertheless, the addition of graphene has produced a noticeable improvement in flexural properties. This signifies that with the inclusion of graphene nanoplatelets, the properties of epoxy grout can be improved if a better dispersion can be achieved.

Surface Modified Clay Reinforced Silicon Incorporated Epoxy Hybrid Nanocomposites: Thermal, Mechanical, and Morphological Properties

2018 ◽  
Vol 9 (1) ◽  
pp. 1-22
Author(s):  
C. Karikal Chozhan ◽  
A. Chandramohan ◽  
M. Alagar
Keyword(s):  
Mechanical Properties ◽  
Epoxy Resin ◽  
Epoxy Matrix ◽  
Thermo Gravimetric Analysis ◽  
Epoxy Composites ◽  
Neat Epoxy ◽  
Gravimetric Analysis ◽  
Modified Clay ◽  
Mmt Clay ◽  
Surface Modified

The silicon-containing epoxy/clay nanocomposites were developed by incorporating the surface-modified MMT clay upto 7wt% into Si-epoxy resin. The surface of the montmorillonite (MMT) clay was modified with two surface modifiers namely cetyltrimethylammonium bromide (CTAB) and 3-aminopropyltriethoxysilane (γ-APS). The surface modified clay reinforced Si-epoxy composites were developed in the form of castings, and were characterized for their thermal and mechanical properties. Thermal behaviour of the composites was characterized by differential scanning calorimetry (DSC), thermo gravimetric analysis (TGA) and dynamic mechanical analysis (DMA). Mechanical properties were studied as per ASTM standards. Data result from the different studies, it is inferred that the surface modified clay reinforced Si-epoxy composites exhibit lower Tg than that of neat epoxy matrix (127°C <165°C). The decomposition temperature for 60% weight loss of clay reinforced Si-epoxy composites is 674–823°C which is higher when compared to that of neat epoxy matrix. For 5wt% clay reinforced Si-epoxy composites, the values of tensile, flexural and impact strength are increased to 26%, 21% and 29% respectively. The storage modulus (E’) is increased from 5932 to 6308 MPa for clay reinforced Si-epoxy resin. XRD analysis confirmed the well-dispersed exfoliated nanocomposites structure.

Effect of Thermal-Cold Cycling on Properties of Glass Fiber/ Epoxy Resin Composite for Wind Turbin Blade

2012 ◽  
Vol 482-484 ◽  
pp. 1483-1489
Author(s):  
Xian He Tang ◽  
Min Lu ◽  
Xue Bin Feng ◽  
Kui Liu
Keyword(s):  
Mechanical Properties ◽  
Weight Loss ◽  
Flexural Strength ◽  
Glass Fiber ◽  
Epoxy Resin ◽  
Loss Rate ◽  
Neat Epoxy ◽  
Weight Loss Rate ◽  
Static Mechanical ◽  
Static Mechanical Properties

The weight loss rate, FTIR characteristic, static mechanical properties and dynamic mechanical properties of neat epoxy resin and glass fiber/ epoxy resin laminates (GF/EP) after thermal-cold cycling were studied in this paper. The rule of static tensile and flexural strength of neat epoxy resin and GF/EP after ageing was investigated through the static mechanical properties analysis. The ageing mechanism of GF/EP was studied by analyzing the storage modulus (E′), loss modulus (E"), loss factor of GF/EP and FITR of epoxy resin. The results show that the weight loss rate increases with the ageing time，which is up to 9% after 400 times ageing cycle. The strength and flexural strength of GF/EP decreased by 6% and 21% after ageing, while the tensile strength of neat epoxy resin increases by 8% and its flexural strength increases slightly after ageing. The mechanism analysis reveals that internal defects of GF/EP would be induced by thermal-cold cycling stress, which results in the interface bonding strength dropping and the performance reducing.

Effects of Nano-Silica Addition on Water Absorption of Glass Fiber/Epoxy Composite

2013 ◽  
Vol 853 ◽  
pp. 40-45 ◽  
Author(s):  
Huey Ling Chang ◽  
Chih Ming Chen ◽  
Cheng Ho Chen
Keyword(s):  
Mechanical Properties ◽  
Water Absorption ◽  
Glass Fiber ◽  
Epoxy Resin ◽  
Water Resistance ◽  
Epoxy Composite ◽  
Dynamic Mechanical Properties ◽  
Nano Silica ◽  
Dynamic Mechanical ◽  
Water Absorption Test

Nanocomposite samples containing epoxy resin, glass fiber and 0~2 wt.% SiO2 nanopowder are prepared. The effects of SiO2 addition on the water absorption rate, glass transition temperature (Tg) and dynamic mechanical properties of the various samples are then observed. The water absorption of the nanocomposite specimens is then compared with that of pure glass fiber/epoxy composite specimens when tested in water. The results show that the addition of 2 wt.% SiO2 reduces the water absorption from 0.0704% to 0.0573%. The storage modulus with adding 2wt.% silica nanocomposite compared to the neat composite raises up 13.82%. Following the water absorption test, the mechanical properties of the samples are not obvious change. Therefore, the experimental results indicate that 2wt.% SiO2 addition is beneficial to the water resistance and dynamic mechanical properties of epoxy resin / glass fiber nanocomposites.

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