Preparation and dynamic mechanical properties of polyurethane-modified epoxy composites filled with functionalized fly ash particulates

2007 ◽  
Vol 105 (3) ◽  
pp. 1118-1126 ◽  
Author(s):  
Gaohui Wu ◽  
Jian Gu ◽  
Xiao Zhao
Keyword(s):  
Mechanical Properties ◽  
Fly Ash ◽  
Dynamic Mechanical Properties ◽  
Epoxy Composites ◽  
Dynamic Mechanical ◽  
Modified Epoxy

Fabrication and Dynamic Mechanical Properties Offly Ash/Epoxy Composites

2007 ◽  
Vol 353-358 ◽  
pp. 1467-1470 ◽  
Author(s):  
Gao Hui Wu ◽  
Jian Gu ◽  
Qiang Zhang ◽  
Xiao Zhao
Keyword(s):  
Mechanical Properties ◽  
Fly Ash ◽  
Dynamic Mechanical Properties ◽  
Epoxy Composites ◽  
Dynamic Mechanical ◽  
Waste Production ◽  
The Matrix ◽  
Dynamic Elastic Moduli ◽  
Test Specification ◽  
Modified Epoxy

An inexpensive fly ash (FA), which is from a waste production, has been employed to fabricate fly ash/epoxy composites in our work. Three kinds of fly ash with the most probable diameters of 74"m, 119"m and 146"m were filled in the modified epoxy resin (EP). The purpose of this study is to characterize the dynamic mechanical properties of such composites, and the dynamic mechanical behaviors of the composites are investigated in the temperature range from -40 to 150oC using a tension-compression mode. The results indicate that the dynamic elastic moduli for the fly ash/epoxy composites are (1.4~2.0) GPa, and the peak values of loss factor (tanδ) for these composites can reach (0.79~0.90) in the test specification. In addition, a scanning electron microscope (SEM) has been used to observe the distribution of fly ash particles in the matrix, as well as the photographs of fracture surface of composites.

scholarly journals Evaluation of Dynamic Mechanical Properties of Fique Fabric/Epoxy Composites

2019 ◽  
Vol 22 (suppl 1) ◽  
Author(s):  
Michelle Souza Oliveira ◽  
Fabio da Costa Garcia Filho ◽  
Fernanda Santos da Luz ◽  
Luana Cristyne da Cruz Demosthenes ◽  
Artur Camposo Pereira ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Dynamic Mechanical Properties ◽  
Epoxy Composites ◽  
Dynamic Mechanical

scholarly journals Dynamic Mechanical Properties of Hybrid Layered Silicates/Kaolin Geopolymer Filler in Epoxy Composites

2017 ◽  
Vol 54 (3) ◽  
pp. 543-545 ◽  
Author(s):  
Yusrina Mat Daud ◽  
Kamarudin Hussin ◽  
Azlin Fazlina Osman ◽  
Che Mohd Ruzaidi Ghazali ◽  
Mohd Mustafa Al Bakri Abdullah ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
High Speed ◽  
Hybrid Composites ◽  
Loss Modulus ◽  
Dynamic Mechanical Properties ◽  
Mechanical Analysis ◽  
Layered Silicates ◽  
Epoxy Composites ◽  
Damping Factor ◽  
Dynamic Mechanical

Preparation epoxy based hybrid composites were involved kaolin geopolymer filler, organo-montmorillonite at 3phr by using high speed mechanical stirrer. A mechanical behaviour of neat epoxy, epoxy/organo-montmorillonite and its hybrid composites containing 1-8phr kaolin geopolymer filler was studied upon cyclic deformation (three-point flexion mode) as the temperature is varies. The analysis was determined by dynamic mechanical analysis (DMA) at frequency of 1.0Hz. The results then expressed in storage modulus (E�), loss modulus (E�) and damping factor (tan d) as function of temperature from 40 oC to 130oC. Overall results indicated that E�, E�� and Tg increased considerably by incorporating optimum 1phr kaolin geopolymer in epoxy organo-montmorillonite hybrid composites.

scholarly journals Research on the Dynamic Mechanical Properties and Energy Dissipation of Expansive Soil Stabilized by Fly Ash and Lime

2019 ◽  
Vol 2019 ◽  
pp. 1-13 ◽  
Author(s):  
Sheng-quan Zhou ◽  
Da-wei Zhou ◽  
Yong-fei Zhang ◽  
Wei-jian Wang ◽  
Dongwei Li
Keyword(s):  
Mechanical Properties ◽  
Compressive Strength ◽  
Fly Ash ◽  
Expansive Soil ◽  
Dynamic Mechanical Properties ◽  
Test Results ◽  
Absorbed Energy ◽  
Dynamic Mechanical ◽  
Stabilized Soil ◽  
Dynamic Compressive Strength

To probe into the dynamic mechanical properties of expansive soil stabilized by fly ash and lime under impact load, the split-Hopkinson pressure bar (SHPB) test was carried out in this study. An analysis was made on the dynamic mechanical property and final fracture morphology of stabilized soil, and the failure mechanism was also explored from the perspective of energy dissipation. According to the test results, under the impact pressure of 0.2 MPa, plain soil and pure fly ash-stabilized soil exhibit strong plasticity. After the addition of lime, the stabilized soil shows obvious brittle failure. The dynamic compressive strength and absorbed energy of stabilized soil first increase and then decrease with the change of mix proportions. Both the dynamic compressive strength and the absorbed energy reach the peak value at the content of 20% fly ash and 5% lime (20% F + 5% L). In the process of the test, most of the incident energy is reflected back to the incident bar. The absorbed energy of stabilized soil increases linearly with the rise of dynamic compressive strength, while the absorbed energy is negatively correlated with the fractal dimension. The fractal dimension of pore morphology of the plain soil is lower than that of the fly ash-lime combined stabilized soil when it comes to the two different magnification ratios. The test results indicate that the modifier content of 20% F + 5% L can significantly improve the dynamic mechanical properties of the expansive soil.

Thermal stability and dynamic mechanical behavior of functional multiphase boride ceramics/epoxy composites

2019 ◽  
Vol 39 (6) ◽  
pp. 508-514
Author(s):  
Yannan He ◽  
Zhiqiang Yu
Keyword(s):  
Mechanical Properties ◽  
Thermal Stability ◽  
Loss Modulus ◽  
Dynamic Mechanical Properties ◽  
Mechanical Analysis ◽  
Epoxy Composites ◽  
Scanning Calorimetry ◽  
Element Analysis ◽  
Reaction Heat ◽  
Dynamic Mechanical

Abstract The thermal and dynamic mechanical properties of epoxy composites filled with zirconium diboride/nano-alumina (ZrB2/Al2O3) multiphase particles were investigated by means of differential scanning calorimetry, dynamic thermo-mechanical analysis, and numerical simulation. ZrB2/Al2O3 particles were surface organic functional modified by γ-glycidoxypropyltrimethoxysilane for the improvement of their dispersity in epoxy matrix. The results indicated that the curing exotherm of epoxy resin decreased significantly due to the addition of ZrB2/Al2O3 multiphase particles. In comparison to the composites filled with unmodified particles, the modified multiphase particles made the corresponding filling composites exhibit lower curing reaction heat, lower loss modulus, and higher storage modulus. Generally speaking, the composites filled with 5 wt% modified multiphase particles presented the best thermal stability and thermo-mechanical properties due to the better filler-matrix interfacial compatibility and the uniform dispersity of modified particles. Finite element analysis also suggested that the introduction of modified ZrB2/Al2O3 multiphase particles increased the stiffness of the corresponding composites.

Static and dynamic mechanical properties of novel treated jute/green epoxy composites

2015 ◽  
Vol 86 (9) ◽  
pp. 960-974 ◽  
Author(s):  
Abdul Jabbar ◽  
Jiří Militký ◽  
Jakub Wiener ◽  
Mehmet Karahan
Keyword(s):  
Mechanical Properties ◽  
Dynamic Mechanical Properties ◽  
Epoxy Composites ◽  
Dynamic Mechanical
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