Study on the Synthesis and Properties of EP/PU Composite

2011 ◽  
Vol 221 ◽  
pp. 135-139 ◽  
Author(s):  
Xiao Qian Wang ◽  
Zhi Xiong Huang ◽  
Juan Li Zheng ◽  
Qi Lin Mei
Keyword(s):  
Mechanical Properties ◽  
Polyethylene Glycol ◽  
Epoxy Resin ◽  
Ftir Spectrum ◽  
Damping Properties ◽  
Testing Frequency ◽  
Higher Temperature

Isocyanate-terminated polyurethane was synthesized from polyethylene glycol and toluene disocyantes, which was used to modify the epoxy resin. D-230 was chosen as hardener to produce the PU/EP composite. The structure of composite was characterized by FTIR spectrum. Mechanical properties of the epoxy resin with different PU content were studied. Additionally, damping properties of the PU/EP composite were investigated using DMA, and the results showed that the damping properties of EP evidently improved by blending with PU and with the testing frequency increased, the spectra of tanδ-T shifted to higher temperature.

scholarly journals A Study Regarding the Mechanical Properties of a Hybrid Matrix with Various Volume Proportions of Dammar

2020 ◽  
Vol 57 (1) ◽  
pp. 133-140
Author(s):  
Dumitru Bolcu ◽  
Marius Marinel Stanescu ◽  
Ion Ciuca ◽  
Cosmin Mihai Miritoiu ◽  
Alin Dinita ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Epoxy Resin ◽  
Vibration Mode ◽  
Vibration Damping ◽  
The Other ◽  
Damping Properties ◽  
Elongation At Break ◽  
Hybrid Resin ◽  
Natural Resin ◽  
Volume Proportion

This paper studies the influence of the volume proportion between components on the mechanical behaviour of a hybrid resin obtained by combining the natural resin Dammar and epoxy resin. We analyse three sets of hybrid resin samples, in which we used a Dammar volume proportion of 60%, 70%, and 80% respectively and epoxy resin (employed together with its associated reinforcement in order to generate a quick process of polymerization). Following the tensile test we found the characteristic curves, the tensile strength and the elongation at break for each of the three types of resins. We also looked into the vibration damping properties of bars made of this resin. We experimentally determined the frequency and the damping coefficient of the first particular vibration mode for one bar taken out of each set of resins, with one end fixed and the other free. On the basis of the results, we calculated the loss coefficient for each type of resin.

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.

Design of Shellac-Based Film with Improved Mechanical Properties through Composite Formation with Clay

2012 ◽  
Vol 506 ◽  
pp. 290-293 ◽  
Author(s):  
P. Piyawatakarn ◽  
P. Sriamornsak ◽  
J. Nunthanid ◽  
C. Limmatvapirat ◽  
Sontaya Limmatvapirat
Keyword(s):  
Mechanical Properties ◽  
Polyethylene Glycol ◽  
Composite Film ◽  
Composite Films ◽  
Ammonia Solution ◽  
Physical Mixture ◽  
Ftir Spectrum ◽  
Percent Elongation ◽  
Composite Formation ◽  
Puncture Strength

The objective of this study was to explore the effect of clay on mechanical and related properties of shellac (SHL) films. The SHL was dissolved in ammonia solution, and then casted into the film. For SHL-clay composite film, bentonite (BTN) which is popular clay in pharmaceuticals, was added and well dispersed before casting. The SHL and SHL-BTN composite films were then comparatively characterized. The results showed that SHL-BTN composite films were stiffer than SHL films since the modulus was 3 times higher. However, the percent elongation was lower, suggesting the more fragility of composite film. The drawback of composite film was solved by adding of polyethylene glycol. The percent elongation of composite film, puncture strength and modulus were higher than those of SHL film. However, BTN may be dispersed in the film without any interaction of shellac molecules since the FTIR spectrum of SHL-BTN composite film did not change as compared to physical mixture of SHL and BTN. The knowledge gained should provide an alternative way of modification of shellac properties for coating.

Damping Properties of Epoxy-Embedded Piezoelectric Composites

2012 ◽  
Vol 512-515 ◽  
pp. 1342-1346 ◽  
Author(s):  
Xuan Qing Hong ◽  
Xu Sheng Wang ◽  
Xiang Ming Li ◽  
Rui Chen ◽  
Xi Yao ◽  
...  
Keyword(s):  
Epoxy Resin ◽  
Loss Factor ◽  
Composite System ◽  
Piezoelectric Effect ◽  
Piezoelectric Materials ◽  
Mechanical Analysis ◽  
Damping Properties ◽  
Piezoelectric Composites ◽  
Testing Frequency ◽  
Piezoelectric Devices

The 0-3 and 1-3 composites have been widely used to produce various kinds of piezoelectric devices. This article focuses on the damping properties of the epoxy/piezoelectric composites. Due to the piezoelectric effect, the composites are expected to improve the damping properties and can be used in the field of vibration reduction and noise control. Two piezoelectric materials were embedded into the epoxy resin to make specimens, T-ZnOw/epoxy resin as 0-3 and PZT fibers/epoxy resin as 1-3 composite. With the method of dynamic mechanical analysis, the temperature dependence of the mechanical storage modulus and the loss factor (tanδ) were measured at different frequencies. The experimental results clearly show that the loss factor increases when testing frequency is higher. In this study, the piezoelectric damping and the viscoelastic effect are discussed and both of them contribute to the damping property of the composite system.

scholarly journals A Study of Some Mechanical Properties of a Category of Composites with a Hybrid Matrix and Natural Reinforcements

Polymers ◽  
2019 ◽  
Vol 11 (3) ◽  
pp. 478 ◽  
Author(s):  
Marius Stănescu ◽  
Dumitru Bolcu
Keyword(s):  
Mechanical Properties ◽  
Composite Materials ◽  
Epoxy Resin ◽  
Wheat Straw ◽  
Damping Properties ◽  
Hybrid Resin ◽  
Hybrid Matrix ◽  
Natural Resin

The current composite materials must meet a double challenge, one that involves obtaining mechanical properties suitable to the field of activity in which they are used and another one, equally important, that requires that they be renewable. In this paper, we have obtained a category of composite materials that have natural reinforcements (fabrics of flax, cotton, hemp, cattail leaves, and wheat straw). As a matrix, we have used three types of hybrid resin, in the composition of which we used the natural resin dammar, in different majority volume proportions. The differences, up to 100%, were represented by epoxy resin and its associated reinforcement, to generate a quick process of polymerization. We have measured certain mechanical properties and the damping properties of the three types of hybrid resin and of the composite materials under study. Based on these properties, we point out a few fields of activity where these composite materials can be used.

Effect of Epoxy Resin Concentration on Some Mechanical Properties of Carbon Fabric/ Nitrile Rubber Reinforced Composites

2019 ◽  
Vol 9 (1) ◽  
pp. 1-15
Author(s):  
Sawsan Fakhry Halim ◽  
Said Sayed Gad El Kholy ◽  
HalaFikry Naguib ◽  
Riham Samir Hegazy ◽  
Nermen Mohamed Baheg
Keyword(s):  
Mechanical Properties ◽  
Epoxy Resin ◽  
Nitrile Rubber ◽  
Reinforced Composites ◽  
Carbon Fabric

850.0 and 852.0 ALUMINUM ALLOY BEARING BARS

Alloy Digest ◽  
1988 ◽  
Vol 37 (9) ◽  
Keyword(s):  
Mechanical Properties ◽  
Thermal Conductivity ◽  
Corrosion Resistance ◽  
Aluminum Alloy ◽  
Heat Treating ◽  
Light Metal ◽  
General Purpose ◽  
High Ductility ◽  
Higher Temperature ◽  
Bearing Alloy

Abstract 850.0 ALUMINUM Alloy can be considered the general purpose light metal bearing alloy. Its good thermal conductivity keeps operating temperatures low. It has high ductility. In many applications it has been found to be superior to steel backed bearings. 852.0 ALUMINUM Alloy has higher mechanical properties making it suitable for heavier load and higher temperature applications. This datasheet provides information on composition, physical properties, hardness, elasticity, tensile properties, and shear strength. It also includes information on corrosion resistance as well as heat treating and machining. Filing Code: Al-290. Producer or source: Federated Bronze Products Inc..

The Mechanical Properties of Organic Modified Epoxy Resin

2020 ◽  
Vol 43 (3) ◽  
pp. 10-14
Author(s):  
Georgel MIHU ◽  
Claudia Veronica UNGUREANU ◽  
Vasile BRIA ◽  
Marina BUNEA ◽  
Rodica CHIHAI PEȚU ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Composite Materials ◽  
Epoxy Resin ◽  
Epoxy Matrix ◽  
Epoxy Resins ◽  
Mechanical Tests ◽  
Organic Modification ◽  
Three Point Bending ◽  
Modified Epoxy

Epoxy resins have been presenting a lot of scientific and technical interests and organic modified epoxy resins have recently receiving a great deal of attention. For obtaining the composite materials with good mechanical proprieties, a large variety of organic modification agents were used. For this study gluten and gelatin had been used as modifying agents thinking that their dispersion inside the polymer could increase the polymer biocompatibility. Equal amounts of the proteins were milled together and the obtained compound was used to form 1 to 5% weight ratios organic agents modified epoxy materials. To highlight the effect of these proteins in epoxy matrix mechanical tests as three-point bending and compression were performed.

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