Effect of external factors on the swelling of hydrogels based on poly(ethylene glycol) maleate with some vinyl monomers

Burkeev, M. Zh.; Magzumova, A. K.; Tazhbaev, E. M.; Burkeeva, G. K.; Kovaleva, A. K.; Khamitova, T. O.; Матаев, М. М.

doi:10.1134/s1070427213010114

Cited by 6 publications

(4 citation statements)

References 2 publications

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“…Mainly it relates to the gels with high content of ionized groups. Investigations which have been done before [9] on the copolymers of polyethylene glycol maleate with some vinyl monomers and the results presented above have shown that the latter show polyelectrolytic and polyampholytic properties. This presupposes the susceptibility of the gels studied to the ions of low molecular salts.…”

Section: Resultsmentioning

confidence: 90%

Investigation of copolymers based on unsaturated polyester resins

Burkeyeva¹

2017

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

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The possibility of controlling the properties of network copolymers of polyethylene glycol maleate by changing external factors (pH of medium, temperature, the presence of organic solvents and low molecular weight inorganic salts) has been studied. Swelling capacity of the copolymers investigated was studied using gravimetric method. It has been established that the hydrogels are sensitive to the change of pH of medium and the copolymers' samples undergo reversible swelling-collapse-swelling transfer. Basic factors which determine the swelling of the gels studied are electrostatic repulsion of similarly charged carboxylic groups and appearance of opposite charges on macrochains as a result of the hydrolysis of acrylamide segments. It has been shown that the hydrogels of polyethylene glycol maleate with acrylamide are sensitive to the influence of temperature and the dependence of the swelling degree has extreme character. The sensitivity of the copolymers to the presence of low molecular salts has been established. Combined regimen of their behavior in the presence of salts is due to the hydrolysis of amide bond in the segments of the copolymer of polyethylene glycol maleate. When adding organic solvent to the medium which is the polymer swollen in water continuous contraction of the samples studied is observed and it leads to the shrinkage of the hydrogels' size. Suppressive action of organic solvents on swelling of the copolymers of polyethylene glycol maleate with acrylamide is explained by the polarity of the solvents.

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Section: Resultsmentioning

confidence: 90%

Investigation of copolymers based on unsaturated polyester resins

Burkeyeva¹

2017

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

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“…It is known that the products of copolymerization of unsaturated polyester resins with vinyl monomers are refractory and cross-linked copolymers [7]. In addition, our previous studies showed copolymerization with ionogenic monomers, which also leads to the formation of cross-linked copolymers at any ratios of the initial monomers.…”

Section: Resultsmentioning

confidence: 93%

“…Based on analysis of the literature and patent searches, there are few data on the curing of unsaturated polyesters with ionic comonomers, despite the fact that this process enables the synthesization of "intelligent" polymers. Accordingly, we obtained cross-linked copolymers based on polyethylene glycol maleinate with acrylic and methacrylic acids and acrylamide, which showed satisfactory moisture-absorbing properties [7].…”

Section: Introductionmentioning

confidence: 99%

Influence of RAFT Agent on the Mechanism of Copolymerization of Polypropylene Glycol Maleinate with Acrylic Acid

et al. 2022

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Studies have shown the possibility of synthesizing new polymers based on polypropylene glycol maleate with acrylic acid in the presence of a RAFT agent (2-Cyano-2-propyl dodecyl trithiocarbonate CPDT). The effect of RAFT agent concentration on network density has been shown to be connected with product yield. Herein, the composition of the obtained copolymers was determined using FTIR spectrometry in combination with the chemometric method of partial least squares (or projection to latent structures). To investigate the synthesized hydrogels, the degrees of equilibrium swelling was studied. The resulting objects were characterized by infrared spectroscopy. The surface morphology of the polymers was studied and the pore sizes were estimated using scanning electron microscopy. The structure of the test samples was confirmed by NMR spectroscopy. The thermal stability of crosslinked polymers was determined using thermogravimetry.

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“…It was shown previously [12] that copolymers of poly(ethylene glycol maleate) with acrylic and methacrylic acids exhibit high moisture-absorbing properties. It was interesting to synthesize copolymers of p-EGM with AA and to examine them as a polymeric support for nanocatalytic systems.…”

Section: Resultsmentioning

confidence: 98%

Nanocatalytic systems based on poly(ethylene glycol maleate)-acrylamide copolymers

et al. 2015

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The radical copolymerization of poly(ethylene glycol maleate) with acrylamide was performed for the fi rst time to obtain 3D cross-linked polymers. The infl uence of temperature, pH of the medium, and organic solvents on the behavior of the synthesized copolymers was studied. The possibility of obtaining nickel nanoparticles in the bulk of the polymer gel for pyridine hydrogenation was demonstrated.Active progress of basic research in the fi eld of radical copolymerization, allowing control of the properties, structure, and molecular mass of the copolymers and the reaction rate, makes it topical to search for new monomers for preparing polymers with a wide spectrum of valuable properties.Unsaturated polyester resins are of much interest from this viewpoint. They readily copolymerize with vinyl monomers. Copolymerization of unsaturated polyester resins was considered for the fi rst time by Boenig [1].The capability of polyester resins to copolymerize with vinyl monomers, e.g., with styrene, was discovered in the middle of the XX century [2].Unsaturated polyester resins based on maleates and fumarates, cured with vinyl monomers, exhibit specifi c physicochemical and physicomechanical properties [1][2][3][4]. Therefore, the production of decorative fi nishing materials and structural items from polyester-styrene copolymers is being actively developed today.Copolymerization of unsaturated polyester resins with acrylates has been studied previously [5][6][7], but data on the related reactions with acrylamide are lacking.The latest studies on copolymerization of unsaturated polyester resins were published in the 1980s. They mainly deal with the development of new formulations for preparing structural materials based on styrene and acrylates. On the other hand, 3D cross-linked copolymers based on unsaturated polyester resins can be highly effective polymeric supports for nanocatalysts based on transition metals. Such compounds are stable and prevent metal particles from aggregation and oxidation for a long time [8].Here we report on a first study of the radical copolymerization of poly(ethylene glycol maleate) with acrylamide in solution to obtain 3D cross-linked polymers and consider the possibility of using these polymers as matrices for preparing catalysts based on nickel nanoparticles. EXPERIMENTALPoly(ethylene glycol maleate) (p-EGM) was prepared by polycondensation of maleic anhydride with ethylene glycol according to the standard procedure [9]. The reaction progress was monitored by determining the acid number and the volume of the released water.The molecular mass (MM) of p-EGM (2350 amu on the average) was determined by the methods of light scattering with a 2100 AN nephelometer (NACH) and of gel permeation chromatography with an Agilent 1260 Infi nity device.

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Effect of external factors on the swelling of hydrogels based on poly(ethylene glycol) maleate with some vinyl monomers

Cited by 6 publications

References 2 publications

Investigation of copolymers based on unsaturated polyester resins

Investigation of copolymers based on unsaturated polyester resins

Influence of RAFT Agent on the Mechanism of Copolymerization of Polypropylene Glycol Maleinate with Acrylic Acid

Nanocatalytic systems based on poly(ethylene glycol maleate)-acrylamide copolymers

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