Organomineral Composite Materials Based on Sodium Liquid Glass, 2,4-Tolylene Diisocyanate, Epoxy Oligomer and Polyisocyanate

The significance of application of the polymer composite materials in current technologies has been proven, since they have been demonstrating high performance parameters, offering improved adhesion failure resistance, enhanced mechanical and thermophysical properties which as a consequence enables their application under both ambient and elevated temperatures. The purpose of the current work is to investigate the influence of the phthalimide modifier on the adhesive and physico-mechanical properties of epoxy composite materials and protective coatings based on them. The ED-20 epoxy diane oligomer has been taken as the main component for the binder in the formation of epoxy materials. Polyethylene polyamine hardener has been used for the crosslinking of epoxy compositions. Phthalimide has been taken as a modifier. The molecular formula of the modifier is: C8H5NO2. The molar mass of phthalimide is 147.13 g/mol. It has been proven that with the introduction of the phthalimide modifier in the amount of 2.0 pts.wt. into 100 pts.wt. of ED-20 epoxy oligomer, the material which offers the following properties is being built up: adhesive failure resistance at breaking off - 47.7 MPa, residual stresses - 1.1 MPa. Compared to the parent epoxy matrix, these properties demonstrate an improvement of the adhesive failure resistance at breaking off by 1.9 times, and in addition to the above, the residual stresses are being reduced by 1.3 times. The composite obtained may be reasonably taken in the form of a matrix when building up an adhesive layer for protective coatings. It has been experimentally proven that in order to build up the materials which would offer improved cohesive properties, it is necessary to use a composition of the following makeup: ED-20 epoxy oligomer (100 pts.wt.), polyethylene polyamine hardener (10 pts.wt.), phthalimide modifier (0.25 pts.wt.). Compared to the parent epoxy matrix, the formation of that kind of a material provides an improvement of the following indicators of physical and mechanical properties of composites: bending critical stresses - from 48.0 MPa to 62.1 MPa; impact value - from 7.4 kJ/m2 to 14.7 kJ/m2. Note that the elasticity coefficient of this material is being reduced compared to the parent epoxy matrix from 2.8 GPa to 2.2 GPa. The composite obtained may be reasonably taken in the form of a matrix when building up the surface layer for protective coatings.

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Study of the effect of synthesized high voltage electric charge of a powder mixture on the physical and mechanical properties of epoxy composites for the transport industry

JOURNAL OF HYDROCARBON POWER ENGINEERING ◽

10.31471/10.31471/2311-1399-2019-2(12)-64-70 ◽

2019 ◽

Vol 6 (2) ◽

pp. 64-70

Author(s):

А.V. Buketov ◽

O.М. Syzonenko ◽

О.М. Bezbakh ◽

A.S. Torpakov ◽

Ye.V. Lypian

Keyword(s):

Mechanical Properties ◽

Composite Materials ◽

High Voltage ◽

Protective Coatings ◽

Experimental Studies ◽

Physical And Mechanical Properties ◽

Epoxy Oligomer ◽

Epoxy Composites ◽

Powder Charge ◽

Transport Industry

For the formation of composite materials and protective coatings for the transport industry, ED-20 epoxy yanoic oligomer, the polyethylene polyamine PEPA and microfine fractions of high-voltage synthesized powder charge were used. The dependence of the content of microdispersed powder on the adhesive, physical and mechanical properties, and residual stresses of epoxy composites has been investigated. It has been proved that for the formation of a composite material or protective coating with improved adhesive and cohesive properties, the optimal particle content is 0.05–0.50 parts by weight per 100 parts by weight of the ED-20 epoxy oligomer. Such materials are characterized by increased mechanical strength and the ability to resist static and dynamic loads, since their properties are significantly increased compared with the matrix. The obtained results of experimental studies of physical and mechanical properties of composite materials are consistent with the test results of samples with adhesive characteristics, indicating their reliability.

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Hybrid Materials Based on Na Liquid Glass, 2,4-Toluene Diisocyanate, Epoxy Oligomer, and Polyisocyanate

Polymer Science Series A ◽

10.1134/s0965545x1806007x ◽

2018 ◽

Vol 60 (6) ◽

pp. 828-844

Author(s):

A. P. Pustovgar ◽

M. G. Bruyako ◽

M. D. Petunova ◽

E. S. Afanasyev ◽

M. G. Ezernitskaya ◽

...

Keyword(s):

Hybrid Materials ◽

Liquid Glass ◽

Epoxy Oligomer ◽

Toluene Diisocyanate

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Investigation of the Influence of the Synthesized Iron-Carbide Mixture on the Adhesive and Mechanical Properties of Epoxy Composites for Parts of Transport Machines

Engineering, Technology & Applied Science Research ◽

10.48084/etasr.3750 ◽

2020 ◽

Vol 10 (5) ◽

pp. 6214-6219

Author(s):

A. Buketov ◽

O. Syzonenko ◽

D. Kruglyj ◽

T. Cherniavska ◽

E. Appazov ◽

...

Keyword(s):

Mechanical Properties ◽

Composite Materials ◽

Protective Coatings ◽

Iron Carbide ◽

Experimental Studies ◽

Physical And Mechanical Properties ◽

Epoxy Oligomer ◽

Epoxy Composites ◽

Dispersed Particles ◽

Polyethylene Polyamine

Epoxy-diane oligomer ED-20, hardener polyethylene polyamine, and micro dispersed particles of iron-carbide mixture synthesized by high-voltage electric discharge have been used for the formation of Composite Materials (CMs) and protective coatings for the transport industry. The dependence of the adhesive, physical, and mechanical properties and residual stresses of epoxy composites on the content of micro dispersed powders has been studied in this paper. It has been proved that for the formation of a composite material or protective coating with improved adhesion and cohesion properties, the optimal content of particles is 0.5 wt.% per 100 wt.% of epoxy oligomer ED-20. Such materials are characterized by increased mechanical strength and the ability to resist static and shock loads, as their properties are significantly increased. The obtained results of the experimental studies of the physical and mechanical properties of composite materials correlate with the studied results of adhesive characteristics, which indicate their veracity.

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Surface modification of dispersed fillers (silicofluoride sodium and ammonium polyphosphate). Their properties and influence on an epoxy matrix

Proceedings of the Voronezh State University of Engineering Technologies ◽

10.20914/2310-1202-2020-1-207-212 ◽

2020 ◽

Vol 82 (1) ◽

pp. 207-212

Author(s):

N. A. Yakovlev ◽

E. V. Plakunova ◽

A. S. Mostovoy ◽

A. S. Shcherbakov

Keyword(s):

Composite Materials ◽

Epoxy Oligomer ◽

Ammonium Polyphosphate ◽

Sieve Analysis ◽

Technological Parameters ◽

Composite Matrix ◽

Particle Parameters ◽

Determining Factor ◽

Physical And Mechanical Characteristics ◽

Modifying Additive

The structure and properties of ammonium polyphosphate and sodium silicofluoride used as dispersed fillers for epoxy compositions were studied. The morphology of the fillers was studied separately and in an epoxy composite matrix using scanning electron microscopy with an X-ray energy dispersive analysis detector. Due to the fact that sodium silicofluoride is a by-product in the production of phosphoric acid, its particle size was determined by sieve analysis and particle parameters were statistically calculated, while a comparative analysis of the studied filler with ammonium polyphosphate widely used in the production of composite materials, which at the same time, was performed time was not modified by the surfactant 3-aminopropyltriethoxysilane. The study of morphology and properties is a determining factor describing the size and type of particles, which entails the possibility of controlling technological parameters, such as the dynamic viscosity of the system, resistance to various loads, therefore, it is possible to obtain highly filled composites having high physical and mechanical characteristics. In this regard, the influence of the studied fillers on the properties of polymer composite materials is determined. The mechanisms of interaction of the modifying additive of 3-aminopropyltriethoxysilane with an epoxy oligomer and the effect of sizing on the properties of sodium silicofluoride and ammonium polyphosphate, processes, and the formation of a monolayer heterofunctional surfactant are studied.

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Comparative Microstructures of Ion Milled and Electrochemically Thinned Composite Materials

Proceedings, annual meeting, Electron Microscopy Society of America ◽

10.1017/s0424820100052742 ◽

1974 ◽

Vol 32 ◽

pp. 546-547

Author(s):

R.R. Russell

Keyword(s):

Electron Microscopy ◽

Transmission Electron Microscopy ◽

Composite Materials ◽

Great Difficulty ◽

Ion Milling ◽

Transmission Electron ◽

Ion Damage ◽

Intermetallic Composite

Transmission electron microscopy of metallic/intermetallic composite materials is most challenging since the microscopist typically has great difficulty preparing specimens with uniform electron thin areas in adjacent phases. The application of ion milling for thinning foils from such materials has been quite effective. Although composite specimens prepared by ion milling have yielded much microstructural information, this technique has some inherent drawbacks such as the possible generation of ion damage near sample surfaces.

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Transmission electron microscopy of composite materials

Proceedings, annual meeting, Electron Microscopy Society of America ◽

10.1017/s0424820100107125 ◽

1988 ◽

Vol 46 ◽

pp. 1012-1015

Author(s):

K.P.D. Lagerlof

Keyword(s):

Composite Materials ◽

Physical Properties ◽

Structural Defects ◽

Structural Composites ◽

Multiphase Materials ◽

Structural Reinforcement ◽

Transmission Electron ◽

Reinforced Fiber ◽

Particulate Reinforced Composites ◽

Definition Of

Although most materials contain more than one phase, and thus are multiphase materials, the definition of composite materials is commonly used to describe those materials containing more than one phase deliberately added to obtain certain desired physical properties. Composite materials are often classified according to their application, i.e. structural composites and electronic composites, but may also be classified according to the type of compounds making up the composite, i.e. metal/ceramic, ceramic/ceramie and metal/semiconductor composites. For structural composites it is also common to refer to the type of structural reinforcement; whisker-reinforced, fiber-reinforced, or particulate reinforced composites [1-4].For all types of composite materials, it is of fundamental importance to understand the relationship between the microstructure and the observed physical properties, and it is therefore vital to properly characterize the microstructure. The interfaces separating the different phases comprising the composite are of particular interest to understand. In structural composites the interface is often the weakest part, where fracture will nucleate, and in electronic composites structural defects at or near the interface will affect the critical electronic properties.

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