Modification of epoxy resins with liquid polysulfide and carboxylated butadiene rubbers

Pyrikov, A. V.; Loiko, D. P.; Kochergin, Yu. S.

doi:10.1134/s1995421210030068

Cited by 7 publications

(3 citation statements)

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“…Table 3 represents the content of gel-fraction of epoxy composite materials exposed in the environmental chamber after three subsequent cycles. The growth of the cross-linking degree for epoxy compositions in moist environment could be explained by the authors [15] in the following manner. Water sorbent by polymers weakens intermolecular bonds resulting in the growth of molecular motion.…”

Section: Resultsmentioning

confidence: 99%

Study of resistance to climatic factors of epoxy coatings modified by plant oils and their functionalized derivatives

et al. 2019

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Epoxy coatings while in-service are regularly exposed to various atmospheric factors including elevated temperature, moisture, solar irradiation, precipitation, fog and others. Those factors accelerate the processes of oxidative and photochemical degradation of epoxy materials which could significantly affect their service life. In the present paper the study of resistance of epoxy materials to climatic factors was carried out in the Artificial weather apparatus simulating external environmental activities by cycles of accelerated tests. It was proven that various types of modifiers exercise influence upon the mass growth of epoxy materials and consequently their sorptive processes. The analysis of investigated results has shown that in epoxy polymer exposed to moisture one could observe competing processes of the growth of cross-linking degree and its plasticization. It was stated that no exact correlation is observed between the degree of cross-linking of epoxy materials and their water fastness and resistance to climatic factors. The authors have proven that outside resistance of epoxy coatings is higher for epoxy compositions modified by soy oil and its functionalized derivatives. Epoxy compositions modified by rubber seed oil exhibited the maximum structural change caused by the impact of climatic factors.

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Section: Resultsmentioning

confidence: 99%

Study of resistance to climatic factors of epoxy coatings modified by plant oils and their functionalized derivatives

et al. 2019

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“…The analysis of publications and patents related to hydroxyethers shows that the challenge that scientists are still facing is to find a new method to modify these materials, not only chemically cured but also thermoplastic. Especially the latter, due to their undeniable advantages (no need for using hardeners and the possibility of multiple processing), seem to be promising materials [ 3 , 4 , 5 , 6 , 7 , 8 , 9 , 13 , 14 , 15 , 16 , 17 , 18 , 19 , 20 , 21 , 22 , 23 , 24 , 25 , 26 , 27 , 28 ]. Analyzing the kinetic models of processes with the use and vulcanization of rubbers, a number of the most stable and tested polymer rubbers can be selected, such as polysulphide (PWK) and styrene-butadiene (SBR) rubbers.…”

Section: Introductionmentioning

confidence: 99%

Analysis of the Impact on the Mechanical Properties of Modification of Oligohydroxyethers in Organic Solvent Solution with Rubbers

2021

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This paper proposes and presents the chemical modification of linear hydroxyethers (LHE) with different molecular weights (380, 640, and 1830 g/mol) with the addition of three types of rubbers (polysulfide rubber (PSR), polychloroprene rubber (PCR), and styrene-butadiene rubber (SBR)). The main purpose of choosing this type of modification and the materials used was the possibility to use it in industrial settings. The modification process was conducted for a very wide range of modifier additions (rubber) per 100 g LHE. The materials obtained in the study were subjected to strength tests in order to determine the effect of the modification on functional properties. Mechanical properties of the modified materials were improved after the application of the modifier (rubber) to polyhydroxyether (up to certain modifier content). The most favorable changes in the tested materials were registered in the modification of LHE-1830 with PSR. In the case of LHE-380 and LHE-640 modified in cyclohexanol (CH) and chloroform (CF) solutions, an increase in the values of the tested properties was also obtained, but to a lesser extent than for LHE-1830. The largest changes were registered for LHE-1830 with PSR in CH solution: from 12.1 to 15.3 MPa for compressive strength tests, from 0.8 to 1.5 MPa for tensile testing, from 0.8 to 14.7 MPa for shear strength, and from 1% to 6.5% for the maximum elongation. The analysis of the available literature showed that the modification proposed by the authors has not yet been presented in any previous scientific paper.

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“…Blending some rubber phase with ER is a commonly used toughening strategy. The majority of used rubbers are polar, as nitrile rubber, − polysulfide rubber, , and silicone rubber, which limit the choice of rubber used as toughened material.…”

Section: Introductionmentioning

confidence: 99%

Study on the Compatibilizing Effect of Janus Particles on Liquid Isoprene Rubber/Epoxy Resin Composite Materials

Chen

et al. 2017

Ind. Eng. Chem. Res.

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Janus hybrid particles (MPS-SiO2@PDVB-DM, JPs) were successively fabricated by grafting dodecyl mercaptan (DM) onto polydivinylbenzene (PDVB) lobe and 3-(trimethoxysilyl)propyl methacrylate (MPS) chains onto SiO2 lobe in the case of SiO2@PDVB Janus particles as the template. Moreover, MPS-SiO2@PDVB-DM Janus particles were used as the compatibilizer of immiscible polymer blends of liquid isoprene rubber (LIR) and epoxy resin (ER). The modified Janus particles were embedded in the interface of LIR and ER, which could improve the compatibility of LIR and ER, mitigating the macrophase separation in the blends. Besides, the compatibilizing effect of MPS-SiO2@PDVB-DM depends not only on the Janus molecular structure but also on the blending process and the curing agent of ER.

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Modification of epoxy resins with liquid polysulfide and carboxylated butadiene rubbers

Cited by 7 publications

References 0 publications

Study of resistance to climatic factors of epoxy coatings modified by plant oils and their functionalized derivatives

Study of resistance to climatic factors of epoxy coatings modified by plant oils and their functionalized derivatives

Analysis of the Impact on the Mechanical Properties of Modification of Oligohydroxyethers in Organic Solvent Solution with Rubbers

Study on the Compatibilizing Effect of Janus Particles on Liquid Isoprene Rubber/Epoxy Resin Composite Materials

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