The Effect of the Dynamic Viscosity of an Epoxide Compound on the Properties of Foam Materials Obtained on Its Basis

Alikin, M. B.; Панфилов, Д. С.; Лавров, Н. А.; Dvorko, I. M.; Polyakova, Yu. V.; Litosov, G. E.

doi:10.1134/s1995421221010032

Cited by 4 publications

(6 citation statements)

References 2 publications

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“…Based on the data analyzed by the Image Pro software, it was observed that the average length of beads increased proportionally with the addition of diluter, as depicted in Figure 7. This finding aligns with the previous research by Alikin et al, 30 which suggests that a decrease in viscosity results in larger bubble pore sizes. Figure 2 shows that the viscosity of the foaming system gradually decreases with the increase in diluent, which will reduce the resistance of gas expansion so that the gas generated during the reaction of the foaming agent is more accessible to form a giant bubble before the resin curing.…”

Section: Resultssupporting

confidence: 93%

Effects of reactive diluent on processing, structure, and properties of epoxy foams and their sandwich composites

Wang,

Han

et al. 2024

Polymer Engineering & Sci

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Foam sandwich composite (FSC) has recently been widely used in transportation, aerospace, shipping, and construction because of its lightweight, high specific strength, stiffness, and fatigue resistance characteristics. This study aimed to prepare, characterize, and test FSC with different diluent addition amounts. Benzyl glycidyl ester was added to the epoxy foam (EF) as a reactive diluent. Then, the EF was introduced into the three‐dimensional hollow composite (3DHC) by vacuum introduction process to prepare the FSC. Fourier transform infrared spectroscopy and thermogravimetric analysis demonstrated that increased diluent content enhanced SiN bond formation, augmenting thermal stability in resin molecules. The effects of different diluents on the mechanical properties of FSC showed that the mechanical properties of FSC were the best when the diluent content was 5 wt%. Compared with 3DHC, the flat compressive strength, flat tensile strength, and shear strength were increased by 7.2, 6.4, and 2.9 times, respectively.Highlights Diluent improves foaming agent dispersion by lowering resin viscosity. Diluent makes the EP easier to be introduced into 3DHC. FSC demonstrates a 723% increase in flat compression strength.

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Section: Resultssupporting

confidence: 93%

Effects of reactive diluent on processing, structure, and properties of epoxy foams and their sandwich composites

Wang,

Han

et al. 2024

Polymer Engineering & Sci

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“…Thermogravimetric analysis (TGA) of the products was carried out on a TGA TA Instruments Q50 equipment from 25 to 700°C at a heating rate of 20°C min −1 under a nitrogen atmosphere 17 . Dynamic viscosity was measured using an TA Instruments ARES GII Rheometer operating at 25°C, with a 25 mm plate‐plate geometry and at shear rates varying from 1 to 300 s −1 19 …”

Section: Methodsmentioning

confidence: 99%

“…17 Dynamic viscosity was measured using an TA Instruments ARES GII Rheometer operating at 25 C, with a 25 mm plate-plate geometry and at shear rates varying from 1 to 300 s À1 . 19…”

Section: Depolymerization Of Poly(ethylene Terephthalate)mentioning

confidence: 99%

Synthesis of new sustainable polyester‐type hydrogels from chemical recycled poly(ethylene terephthalate) products applied on the removal of indigo carmine dye

Schneider,

Simioni,

Petzhold

et al. 2024

J of Applied Polymer Sci

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Large amounts of plastic waste are daily generated, becoming a global issue that needs to be addressed. Thus, new recycling alternatives have been explored, such as the depolymerization of poly(ethylene terephthalate) waste (wPET). These reactions can lead to the formation of oligomers and monomers, which can then be employed in new synthetic processes. The aim of this work is to use the products of the chemical recycling of wPET on the synthesis of hydrogels and evaluate the capacity of these materials to adsorb dyes aiming a wastewater treatment. The depolymerizations were done through glycerolysis reactions catalyzed by zinc (II) acetate under microwave radiation. Afterwards, the obtained oil was crosslinked with citric acid (CA) under tin (II) chloride catalysis to obtain the hydrogels. The water uptake capacity of the hydrogels ranged from 310% to 1442%, depending on the CA content. When placed in an indigo carmine solution, the hydrogels showed high adsorption capacity, removing up to 97% of the dye. The kinetic study revealed a physicochemical mechanism for the removal process, corroborated by Temkin isotherms. These results indicate that the chemical recycling of PET via glycerolysis is a viable alternative for producing hydrogels, reducing plastic waste while creating new tools for wastewater treatment.

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“…Пеноэпоксиды были получены в соответствии с разработанной рецептурой [4]. Результаты эксперимента по определению содержания гел ь-фракции в пеноматериалах представлены в таблице 1.…”

Section: результаты и их обсуждениеunclassified

“…Эпоксидные пены можно легко получить с помощью химических газообразователей. Во время экзотермического процесса отверждения пенообразователь вступает в реакцию с отвердителем и выделяется газ, поэтому вспенивание происходит одновременно с образованием трехмерной полимерной структуры через аминогруппы [4]. Регулируя содержание компонентов композиции, можно получать пены с различной плотностью и свойствами.…”

Section: Introductionunclassified

Dependence of the properties of epoxy foams on the composition

et al. 2021

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The features of the technological process of obtaining foams based on epoxy resin are considered. The influence of the concentration of the components of the composition on the physical and mechanical properties and morphology of the resulting materials is studied. The results of the study of the physical and mechanical properties of the developed epoxy foams are presented. The possibility of obtaining foams with a wide range of adjustable performance properties is shown.

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The Effect of the Dynamic Viscosity of an Epoxide Compound on the Properties of Foam Materials Obtained on Its Basis

Cited by 4 publications

References 2 publications

Effects of reactive diluent on processing, structure, and properties of epoxy foams and their sandwich composites

Effects of reactive diluent on processing, structure, and properties of epoxy foams and their sandwich composites

Synthesis of new sustainable polyester‐type hydrogels from chemical recycled poly(ethylene terephthalate) products applied on the removal of indigo carmine dye

Dependence of the properties of epoxy foams on the composition

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