Epoxy Composites Filled with Natural Calcium Carbonate. 1. Epoxy Composites Obtained in the Presence of Monoperoxy Derivative of Epidian-6 Epoxy Resin

Bratychak, Michael; Astakhova, Olena; Shyshchak, Olena; Zubal, Olha; Sienkiewicz, Maciej; Ivashkiv, Ostap

doi:10.23939/chcht13.03.360

Cited by 11 publications

(18 citation statements)

References 23 publications

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“…The observed appreciable growth in compressive modulus as a result of the addition of small amounts of calcium carbonate reflects what previously found by testing CaCO 3 -epoxy specimens in tensile mode [29,[40][41][42]. This result was attributed to the elastic modulus of the filler, which is much higher than that of the epoxy matrix, according to the "rule of mixture" for composite materials [40,42].…”

Section: Un-aged Epoxy Samples Filled With Different Amounts Of Cacosupporting

confidence: 84%

Aging Effects of Aqueous Environment on Mechanical Properties of Calcium Carbonate-Modified Epoxy Resin

Rudawska

Frigione

2020

Polymers

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The purpose of this study was to assess the effects of different aqueous environments (i.e., demineralised, distilled and spring water) on the mechanical properties of a cold-cured bisphenolic epoxy resin modified with the addition of calcium carbonate filler, typically employed as structural adhesive. The parameters selected for the analysis have been; the kind of curing agent employed to cure the epoxy resin at ambient temperature (i.e., Mannich base and triethylenetetramine); the load of calcium carbonate added to liquid epoxy (i.e., from 1 to 3 g per 100 g of resin) and; the duration of the exposure to the different aging conditions (i.e., from 1 to 10 months). Cylindrical specimens of calcium carbonate-modified epoxy systems were tested in compression mode, before and after each of the aging regimes. The effect of the selected curing agents is very small, and they are both suitable for a cure at ambient temperature, on the unfilled epoxy on compressive maximum strength and strain at break; the choice of the hardener affects instead the compressive modulus. The CaCO3 amount was demonstrated to have a significant effect on the mechanical characteristics of un-aged epoxy systems, leading to growth in compressive modulus and maximum strength with reductions in strain at break. Generally speaking, the aging time noticeably affects the compressive properties of calcium carbonate-modified epoxies while almost negligible is the kind of water employed in each exposure regime. Notwithstanding the adverse effects of an aqueous environment on compressive mechanical properties of CaCO3-filled epoxies, these systems keep compressive modulus and maximum strength greater than, and close to, respectively, the same characteristics measured on unaged unfilled control epoxies, demonstrating the positive effect of the addition of this kind of filler to epoxy-based structural adhesives, especially with the addition of 2 and 3 g of CaCO3 per 100 g resin. The results obtained in this study demonstrated that it is possible to contrast the detrimental effects observed in cold-cured epoxy-based structural adhesives due to their aging in water upon the addition of limited amounts (particularly at 2 and 3 g per 100 g resin) of a cheap CaCO3 filler.

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Section: Un-aged Epoxy Samples Filled With Different Amounts Of Cacosupporting

confidence: 84%

Aging Effects of Aqueous Environment on Mechanical Properties of Calcium Carbonate-Modified Epoxy Resin

Rudawska

Frigione

2020

Polymers

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“…To determine the film hardness and gel-fraction content the samples were poured over the standard glass plates. To determine physico-mechanical properties the samples were poured into special moulds in the form of shovels and bars [19]. The shovels and bars were formed at room temperature for 24 h.…”

Section: Preparation Of Epoxy Oligomeric Mixtures Filled With Cacomentioning

confidence: 99%

“…It is capable of "sweating" during operational process that leads to the deterioration of the product properties. To eliminate this shortcoming it was proposed [19] to introduce a small amount of oligomer with free epoxy and peroxy groups to the mixture of industrial resin Epidian-5, TGM-3 and hardener PEPA. The peroxy group in the oligomer provides the binding of TGM-3 with the basic matrix.…”

Section: Cross-linking Of Unfilled Epoxy-oligomeric Mixturesmentioning

confidence: 99%

“…Previously [19] we proposed to use monoperoxy derivative of Epidian-6 resin to bind TGM-3 with Epidian-5 molecules. This oligomer contains free epoxy and peroxy groups allowing it to be a bonding agent for TGM-3 and Epidian-5 cross-linked by PEPA.…”

Section: Cross-linking Of Filled Epoxy-oligomeric Mixturesmentioning

confidence: 99%

“…Previously [19] we proposed to use CaCO 3 when adding monoperoxide derivative of Epidian-6 (PO) to the epoxy-oligoesteric mixtures based on Epidian-5. PO contains epoxy group and -O-O-bond in its structure allowing PO to be used as a compatibilizer and to bind all components of the mixture.…”

Section: Introductionmentioning

confidence: 99%

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Epoxy Composites Filled with Natural Calcium Carbonate. 2. Epoxy Composites Obtained in the Presence of Monomethacrylic Derivative of Epidian-6 Epoxy Resin

Bratychak¹,

Astakhova²,

Shyshchak³

et al. 2020

ChChT

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On the basis of Epidian-6 epoxy resin and methacrylic acid a monomethacrylic derivative of Epidian-6 with free epoxy and methacrylic groups (MMADER) has been synthesized. The structure of MMADER was confirmed by IR spectroscopy. The thermal stability of MMADER has been established. The cross-linking of unfilled epoxy-oligomeric mixtures and mixtures filled with CaCO 3 has been studied in the presence of MMADER. By means of IR spectroscopy, the chemistry of the formation of mixtures based on Epidian-5, oligoesteracrylate TGM-3, MMADER and polyethylene polyamine has been established. Physico-mechanical characteristics of epoxy-oligomeric mixtures filled with CaCO 3 have been established.

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State of the Art in Industrial Application of Amino-1,2,4-Triazoles

Nazarov

Miroshnichenko

Ivakh

et al. 2023

MROC

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The review summarizes information on the industrial use of 3- and 4-amino-1,2,4-triazoles, the basic raw material for the industry of fine organic synthesis. A description of the existing production methods for the synthesis of 3- and 4-amino-1,2,4-triazoles and some methods of obtaining in laboratory conditions is given. Three main areas of use of these amines and their derivatives have been identified: agriculture, medicine, high-energy substances and gas-generating compositions. It has been shown that one of the earliest areas of widespread use of 3- and 4-amino-1,2,4-triazoles is the production of plant protection products. On their basis, the mass production of various insecticides, fungicides, plant growth regulators, retardants and inhibitors of nitrification of nitrogen fertilizers has been organized. The use of these amines in medicine consists in the production of known drugs on their basis, such as furazonal, thiotriazoline and cardiotril, which have hepatoprotective, antioxidant and anti-ischemic activity. The industrial processing of 3- and 4-amino-1,2,4-triazoles into explosives, solid propellants, propellants, and gas-generating compositions is a third well-known field of application. An explanation is given for the high reactivity of amines and the variety of areas of their use. A significant place in the review is occupied by the analysis of less known directions of use of the indicated aminotriazoles. These are: obtaining new types of salts and electrically conductive ionic liquids, corrosion inhibitors of non-ferrous metals and catalysts for the curing of epoxy resins. The results of recent studies are discussed, and the prospects for the use of 3- and 4-amino-1,2,4-triazoles as raw materials for the production of new reagents in analytical chemistry, proton-exchange membranes, and new condensed nitrogen-containing heterocycles are shown.

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Epoxy Composites Filled with Natural Calcium Carbonate. 1. Epoxy Composites Obtained in the Presence of Monoperoxy Derivative of Epidian-6 Epoxy Resin

Cited by 11 publications

References 23 publications

Aging Effects of Aqueous Environment on Mechanical Properties of Calcium Carbonate-Modified Epoxy Resin

Aging Effects of Aqueous Environment on Mechanical Properties of Calcium Carbonate-Modified Epoxy Resin

Epoxy Composites Filled with Natural Calcium Carbonate. 2. Epoxy Composites Obtained in the Presence of Monomethacrylic Derivative of Epidian-6 Epoxy Resin

State of the Art in Industrial Application of Amino-1,2,4-Triazoles

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