scholarly journals Manufacturing and characterization of epoxy resin with Fe3O4 and SiO2 particles

2020 ◽  
Author(s):  
José Molina ◽  
Bożena Szczucka-Lasota ◽  
Tomasz Węgrzyn ◽  
Abílio P. Silva ◽  
Alberto Maceiras
Keyword(s):  
Mechanical Properties ◽  
Epoxy Resin ◽  
Structural Response ◽  
Reinforced Composites ◽  
Flexural Stress ◽  
Scanning Calorimetry ◽  
Thermosetting Polymers ◽  
Small Fibre ◽  
Glass Fibre Reinforced ◽  
Glass Fibre Reinforced Composites

Thermosetting polymers are very popular in the automotive and aeronautic industry, in particular epoxy resin is widely used as matrix thermoset in carbon and glass  fibre reinforced composites. The properties of these epoxy-based polymers can be improved with the addition of particulate or small fibre materials in order to construct a lightweight material with enhanced mechanical and structural response. This work aimed to manufacture and characterize epoxy resin reinforced composites with iron (II, III) oxide (magnetite, Fe3O4) in amounts of 0.25, 0.5 and 1 wt%, and 2 and 4 wt% of fumed silicon dioxide (silica, SiO2). Mechanical properties were investigated by three-point bending flexural test, fracture toughness, flexural stress relaxation. In addition, apparent porosity, apparent density and Differential Scanning Calorimetry tests were performed. The results showed that the addition of Fe3O4 does not contribute significantly to the improvement of mechanical properties. However, fumed SiO2 promotes a considerable improvement in the mechanical properties.   Keywords: Composite, epoxy resin, Fe3O4, SiO2, mechanical properties

Novel Terpolymers: Poly(keto–amine–urea)S

1996 ◽  
Vol 8 (2) ◽  
pp. 225-231 ◽  
Author(s):  
Hasmukh S Patel ◽  
Manhar J Lad
Keyword(s):  
Epoxy Resin ◽  
Conductometric Titration ◽  
Reinforced Composites ◽  
Resin System ◽  
Amino Groups ◽  
Thermally Stable Polymers ◽  
Epoxy Resin System ◽  
Glass Fibre Reinforced ◽  
Glass Fibre Reinforced Composites ◽  
Fibre Reinforced Composites

Thermally stable polymers containing keto–amine–urea groups have been prepared by condensation of keto–amino groups containing diamine and various diisocyanates. The resulting polymer samples have been characterized by elemental analysis and IR spectra, and Mn estimated by non-aqueous conductometric titration and thermogravimetry. Curing of commercial epoxy resin-DGEBA by employing these polymers was scanned on a differential scanning colorimeter (DSC). Glass fibre reinforced composites (i.e. laminates) based on such terpolymer–epoxy resin system have also been prepared and characterized.

scholarly journals Modified Castor Oil as an Epoxy Resin Curing Agent

2004 ◽  
Vol 1 (1) ◽  
pp. 11-16 ◽  
Author(s):  
B. P. Patel ◽  
H. S. Patel ◽  
S. R. Patel
Keyword(s):  
Epoxy Resin ◽  
Glass Fibre ◽  
Castor Oil ◽  
Thermo Gravimetric Analysis ◽  
Agricultural Product ◽  
Gravimetric Analysis ◽  
Reinforced Composites ◽  
Glass Fibre Reinforced ◽  
Glass Fibre Reinforced Composites ◽  
Fibre Reinforced Composites

A castor oil, an agricultural product, is an unsaturated material. Hence the castor oil is brominated by bromine liquid. The brominated castor oil (BCO) was then reacted with excess of aliphatic diaminesviz; ethylene diamine, 1,3-propane diamine and 1,6-hexane diamine. The resultant amino functionalized castor oil (ACO) samples were then characterized by elemental analysis, IR spectral study and number of amino groups. All the three ACO samples were then employed for the curing of commercial Brominated epoxy resin. The curing of epoxy resin by ACO was monitored on differential scanning calorimeter (DSC) and based on the DSC study their glass fibre reinforced composites (GRC) were fabricated. The cured samples (i.e. unreinforced) were also subjected to thermo gravimetric analysis (TGA). The chemical, mechanical and electrical properties of the glass fibre reinforced composites (GRC) were also evaluated.

Influence of Shelf Life on Mechanical Properties of Glass Fibre Reinforced Composites

2021 ◽  
Vol 58 (1) ◽  
pp. 131-141
Author(s):  
Mihaela Raluca Condruz ◽  
Ionut Sebastian Vintila ◽  
Tiberius Florian Frigioescu ◽  
Alexandru Paraschiv ◽  
Andrei Mandoc ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Shelf Life ◽  
Glass Fibre ◽  
Tensile Tests ◽  
Reinforced Composites ◽  
Plane Shear ◽  
Open Hole ◽  
Glass Fibre Reinforced ◽  
Glass Fibre Reinforced Composites ◽  
Fibre Reinforced Composites

The present paper was focused on studying the influence of shelf life of an epoxy matrix on the mechanical properties of glass fibre reinforced composites. For the study, two types of the same epoxy system were used, one during its shelf life and one out of its shelf life. The reinforcement used consisted in E-glass fibre fabric. Mechanical investigations were realized in order to compare the materials in terms of loss of mechanical strength and elastic properties. Therefore, three mechanical tests were performed: tensile tests, in-plane shear and open-hole tensile tests. The results showed that the shelf life affects the mechanical properties of the polymeric composite. A decrease of 24% in tensile strength was recorded along with a 28% decrease of the in-plane shear strength and 55% of open-hole tensile strength for the composite manufactured with the out of shelf life epoxy system compared with the other composite. An overall reduction of mechanical strength and elastic properties of the composite material was observed, primarily due to polymeric matrix degradation, which after long periods it could be prone to brittleness and susceptible to delamination and fracture. The thermogravimetric analysis showed that thermal induced changes are happening at a higher speed in the out of shelf life composite, a lower mass loss being registered for new epoxy composite.

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

The Influence of Processing Additives on the Properties of Glass-fibre-reinforced Composites Based on Biobased Polyamide 1010

2017 ◽  
Vol 44 (7) ◽  
pp. 43-48 ◽  
Author(s):  
A.A. Nikiforov ◽  
S.I. Vol'fson ◽  
N.A. Okhotina ◽  
R. Rinberg ◽  
L. Kroll
Keyword(s):  
Glass Fibre ◽  
Reinforced Composites ◽  
Glass Fibres ◽  
Glass Fibre Reinforced ◽  
Glass Fibre Reinforced Composites ◽  
Polyamide 1010 ◽  
Fibre Reinforced Composites ◽  
Properties Of Composites

The results of investigating the influence of processing additives from a group of lubricants on the degree of comminution of glass fibres during extrusion and the properties of composites based on biobased polyamide 1010 with different degrees of filling with chopped glass fibre are presented.

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