New Polyampholyte Polymers Based on Polypropylene Glycol Fumarate with Acrylic Acid and Dimethylaminoethyl Methacrylate

Burkeev, M. Zh.; Kudaibergen, G.K.; Burkeeva, G. K.; Сейлханов, Т. М.; Tazhbaev, E. M.; Hraníček, Jakub; Omasheva, Aiman; Davrenbekov, S. Zh.

doi:10.1134/s1070427218070121

Cited by 7 publications

(3 citation statements)

References 23 publications

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“…An explanation for such dependence is the comparison of the activity constants (r 1 ,r 2 ) of the initial co-reagents of p -PGF and AA. The activity constants of the initial co-reagents calculated using the integral method of Maiyo-Luis, is r 1 = 0.82 for p -PGF and r 2 = 1.21 for AA [ 19 ]. As a consequence, it can be concluded that p -PGF is less reactive comparing to AA, and correspondingly, the curing time and the rate of copolymerization reaction drop with the rise of the concentration of p -PGF.…”

Section: Resultsmentioning

confidence: 99%

Investigation of Curing Process and Thermal Behavior of Copolymers Based on Polypropylene Glycol Fumarate and Acrylic Acid Using the Methods of DSC and TGA

Burkeyeva,

Kovaleva,

Tazhbayev

et al. 2023

Polymers

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In this work, the possibility of preparation of copolymers of three-dimensional crosslinked structure based on polypropylene glycol fumarate and acrylic acid is shown. The initial reagent polypropylene glycol fumarate has been synthesized by polycondensation reaction of fumaric acid and propylene glycol. The curing process of polypropylene glycol fumarate and acrylic acid at various mole concentrations was studied using DSC method at isothermal and dynamic regimens. Curing in isothermal condition was carried out at temperatures of 60 °C, 70 °C, and 80 °C. Residual reactivity was evaluated at a dynamic regimen within the temperature range from 30 °C to 200 °C at a constant heating rate. On the basis of calorimetric studies, the thermal effects and kinetic parameters of the reaction (conversion, reaction rate, activation energy) have been determined. Thermal behavior of cured samples of p-PGF-AA was estimated using dynamic thermogravimetry (TGA). According to TGA data, the process of decomposition of the studied copolymers proceeds in several stages. Based on the results obtained, the activation energies of thermal decomposition were calculated using the iso-conversional methods of Kissinger–Akakhira–Sunose and Friedman.

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Section: Resultsmentioning

confidence: 99%

Investigation of Curing Process and Thermal Behavior of Copolymers Based on Polypropylene Glycol Fumarate and Acrylic Acid Using the Methods of DSC and TGA

Burkeyeva,

Kovaleva,

Tazhbayev

et al. 2023

Polymers

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“…Previously synthesized copolymers of polyethylene glycol fumarate (p-EGF) with the acrylic acid (AA) (7.95:92.05 and 89.05:10.95 molar ratio) have been used as the objects of study [6][7]. The study of the copolymers thermal properties was performed using a synchronous TGA/DSC thermal analyzer LabSYS evo DTA/DSC (Setaram, France) in the dynamic mode within the30-1000 ºС temperature range.…”

Section: Methodsmentioning

confidence: 99%

The use of differential calculation methods for the destruction of copolymers of polyethylene glycol fumarate with the acrylic acid

Burkeev¹,

Sarsenbekova²,

Bolatbay³

et al. 2020

Bull. of the Kar. Univ. "Chem". Ser.

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In this work, the thermal decomposition of copolymers based on polyethylene glycol fumarate with the acrylic acid using various ratios of initial monomers has been studied for the first time. The samples were studied in air and nitrogen. According to the thermograms analysis, it was found that the copolymer sample decomposition begins at higher temperatures for a copolymer with high content of polyester resin. The copolymer is vigorously oxidized by the oxygen when heated in air, and one can observe almost complete sample decomposition, whereas it decomposes with a residue of ~ 15% in an inert medium. The activation energies for copolymers with different compositions were estimated using the differential methods of Freeman-Carroll, Achar and Sharpe-Wentworth. The activation energy values found by the three methods demonstrated a good convergence. It was shown that, the activation energy values are higher (~ 200 kJ/mol in the inert medium, and ~ 95 kJ/mol in the oxygen atmosphere) for a copolymer with a lower composition of polyester resin, and the activation energy is ~180 and ~85 kJ/mol for a copolymer with a greater composition of p-EGF-AA. The copolymer is more thermostable in the nitrogen atmosphere according to the kinetic parameters. Additionally, there were determined the thermodynamic characteristics, such as the Gibbs energy (∆G) and the entropy (∆S). They also confirm the destruction process dependence on the components ratio in the synthesized copolymer.

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“…For the first time, the interaction reactions of unsaturated polyester resins with vinyl monomers were called copolymerization reactions by Boenig [7]. At the same time, prior to our studies [8][9][10], there was no information on the copolymerization of unsaturated polyester resins with hydrophilic monomers, which were tested as moisture sorbents and matrix-bases for creating metal-polymer complexes.…”

Section: Introductionmentioning

confidence: 99%

Study of Thermal Decomposition of the Copolymer Based on Polyethylene Glycol Fumarate with Acrylic Acid

Burkeyev

Tazhbayev

Bolatbay

et al. 2022

Journal of Chemistry

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Thermal decomposition of the copolymer based on polyethylene glycol fumarate with acrylic acid (p-EGF:AA) at four different heating rates in a nitrogen atmosphere has been investigated by the dynamic thermogravimetry (TGA) method. The TGA curves show that the decomposition process occurs in several stages. The experimental data processed by the Kissinger–Akahira–Sunose and Friedman isoconversion methods made it possible to calculate the activation energy of the main decomposition stage. According to the calculations results, one can see that the values found by these methods do not strongly depend on the conversion. The Achar–Brindley–Sharp method has been applied to determine the compensation parameters. Then, using the compensation effect, the invariant kinetic parameters of the decomposition processes have been found. An experimental curve has been plotted to find the reaction model in comparison with theoretical ones.

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New Polyampholyte Polymers Based on Polypropylene Glycol Fumarate with Acrylic Acid and Dimethylaminoethyl Methacrylate

Cited by 7 publications

References 23 publications

Investigation of Curing Process and Thermal Behavior of Copolymers Based on Polypropylene Glycol Fumarate and Acrylic Acid Using the Methods of DSC and TGA

Investigation of Curing Process and Thermal Behavior of Copolymers Based on Polypropylene Glycol Fumarate and Acrylic Acid Using the Methods of DSC and TGA

The use of differential calculation methods for the destruction of copolymers of polyethylene glycol fumarate with the acrylic acid

Study of Thermal Decomposition of the Copolymer Based on Polyethylene Glycol Fumarate with Acrylic Acid

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