New Epoxy Composites Based on Potassium Polytitanates

Mostovoi, A. S.; Plakunova, E.V.; Панова, Л. Г.

doi:10.1177/0307174x1304000711

Cited by 15 publications

(23 citation statements)

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“…TCEP served as both a plasticizer and a flame retardant; this led to an increase in the value of the breaking tension at bending from 40 to 50 MPa, an increase in the resistance to impact loads from 3 to 8 kJ/m 2 and an increase in the flammability index (the oxygen index) from 19 to 27 vol %; this ensured the transition of the material to the class of noncombustible . In addition, it was proven that TCEP reacted with the epoxy oligomer during the curing process …”

Section: Resultsmentioning

confidence: 97%

“…A previously developed composition containing 100 parts (by weight) of the epoxy resin ED‐20, 42 parts of TCEP, and 15 parts of the hardener PEPA was used as the polymeric matrix.…”

Section: Resultsmentioning

confidence: 99%

“…To compare the performance properties of the epoxy composites containing WPPTs with those containing layered PPTs,, 0.1 parts (by weight) of WPPTs were introduced into the epoxy composition upon ultrasonic dispersion over 60 min.…”

Section: Resultsmentioning

confidence: 99%

“…Trichloroethyl phosphate (TCEP) was chosen to plasticize the epoxy composites because of the presence of flame retardants (phosphorus and chlorine) in its structure; the structure of the epoxy polymer at elevated temperatures increased the yield of carbonized structures. Chlorine, formed in the pyrolysis of compositions containing TCEP and entering the gas phase, dilutes combustible gases; this reduces, the concentration limit of ignition and the flammability of epoxy composites in general …”

Section: Methodsmentioning

confidence: 99%

“…The influence of PPTs with amorphous layered structures on the performance characteristics of epoxy composites has been studied earlier …”

Section: Introductionmentioning

confidence: 99%

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Epoxy composites modified with microfibers of potassium polytitanates

Mostovoy

Kadykova

Bekeshev

et al. 2018

J of Applied Polymer Sci

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The research we conducted shows the possibility of the directed adjustment of epoxy composite performance characteristics through the application of small additives of potassium polytitanate whiskers, the introduction of polyfunctional plasticizers with chemical and mechanical methods of activation of the whole composition and its components; this ensured the creation of a new generation of epoxy composites with high‐performance properties (breaking tension = 116 MPa and modulus of elasticity at bending = 3150 MPa, destructive tension under compression = 95 MPa, impact strength = 18 kJ/m2 that meets the requirements of most industries. © 2018 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2018, 135, 46651.

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Section: Resultsmentioning

confidence: 97%

“…A previously developed composition containing 100 parts (by weight) of the epoxy resin ED‐20, 42 parts of TCEP, and 15 parts of the hardener PEPA was used as the polymeric matrix.…”

Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%

“…The influence of PPTs with amorphous layered structures on the performance characteristics of epoxy composites has been studied earlier …”

Section: Introductionmentioning

confidence: 99%

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Epoxy composites modified with microfibers of potassium polytitanates

Mostovoy

Kadykova

Bekeshev

et al. 2018

J of Applied Polymer Sci

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Reinforcing effects of aminosilane-functionalized h-BN on the physicochemical and mechanical behaviors of epoxy nanocomposites

Mostovoy

Vikulova

Lopukhova

2020

Sci Rep

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The results of this study confirm the possibility of the directional regulation of operational properties of epoxy composites by the use of small additives of hexagonal boron nitride (h-BN), providing the creation of epoxy composites with high performance properties. The effectiveness of h-BN surface modification by γ-aminopropyltriethoxysilane and the formation of strong chemical bonds at the polymer matrix/filler interface has been proved, which ensures an increase in physico-mechanical characteristics of epoxy composites: bending stress increases by 142% and bending modulus increases by 52%, strength increases by 53% and tensile elastic modulus increases by 37%, toughness increases by 400% and Brinell hardness increases by 96%, compared with an unfilled plasticized epoxy composite. Research in the field of polymer modification with functional additives is widely used to create polymer materials with a given set of consumer characteristics. So, to give polymer composite materials and products made from them enhanced functional characteristics, various modifying additives are used, for example, graphite, CNTs, TEG, graphene or metal oxides 1-14. The use of nanocomposites is determined by their unique properties, which are due to the huge specific surface and high surface energy of nanoparticles. Nanometer particles, unlike microand larger inclusions, are not stress concentrators, which contributes to a significant increase in the mechanical properties of nanocomposites 1-3,7. However, the addition of nanomaterials into epoxy compositions only slightly increases the strength of composites and in some cases even decreases it. This is due to small adhesion between nanomaterials and the polymer matrix and to the fact that it is often energetically more profitable for nanomaterials to agglomerate with each other. As a result, to improve adhesion interaction with the polymer matrix and to improve dispersion (reduce agglomeration) hardening nanomaterials are modified in various ways: by plasma treatment, by acid treatment, amines, etc. 6-9. A promising method of surface modification of nanomaterials is direct fluorination, i.e. the effect of fluorine gas mixtures at temperatures from room temperature to 400-500 °C. Fluorination also leads to improved solubility of nanomaterials in various solvents. The effect of CNTs modified by direct fluorination on the properties of epoxy composites was shown in 7. The addition of 0.1 mass % fluorinated CNTs improves physical and mechanical properties: 50% increase in strength and 74% increase in modulus of elasticity during tension, 60% increase in strength and 66% increase in modulus of elasticity during bending, and besides, abrasive wear decreases by 33%. In this research 6 , aminopropyltrimethoxysilane was incorporated as an interfacial modifier on the surface of graphene (Gr) nanoplatelets. The addition of functionalized Gr enhanced the tensile strength and strain to failure only at low contents (i.e., 0.05 wt%). Besides, this decreased the coefficient of friction and wear rat...

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