New plasticizers for cellulose esters

Искендерова, С. А.; Sadieva, N.F.; Эфендиева, Л. М.; Асадова, Ш. Н.; Черепнова, Ю. П.; Musaeva, A.P.

doi:10.35164/0554-2901-2020-1-2-15-16

Cited by 3 publications

(3 citation statements)

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“…Для эфиров целлюлозы в качестве пластификаторов, повышающих физико-механические показатели этролов, получены алкиловые диэфиры и эпоксидиэфиры 3,6-эндометилентетрагидрофталевой кислоты [8]. В целях повышения оптических, физико-механических и адгезионных характеристик поливинилбутиральных пленок нашли свое применение в качестве пластифицирующих агентов дибутилсебацинат и диоктиладипинат [9].…”

Section: Introductionunclassified

Study of the Viscosity of a Bromine -Containing Plasticizer From Production Waste

2022

Izv. Vyssh. Uchebn. Zaved. Khim. Khim. Tekhnol.

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The importance of studying the viscosity parameters of liquid ingredients of plastics and elastomers for solving a number of technological issues related to taking into account the energy costs required to perform basic and auxiliary production operations in the processing of polymer materials is noted. The influence of the degree of halogenation of unsaturated mixed plasticizer obtained from industrial waste on its viscosity in the temperature range corresponding to the technological parameters of processing polymer materials 273-393 K. It is shown, that with an increase in the degree of bromination at a constant temperature the viscosity of the bromine-containing plasticizer increases by 63.3%, 52.0% and 46.8%, respectively. With an increase in temperature to 353-393 K, a decrease in the maximum viscosity values for samples with a mass fraction of bromine of 14.4% by 26% was found. It is shown that in the studied range of the degree of bromination, the viscosity drop with an increase in temperature to 393 K is 96%. An equation is proposed to evaluate the effect of the degree of bromination and temperature on the viscosity of a mixed bromine-containing plasticizer of the phthalate type, obtained from production waste. The values of its coefficients in a given temperature range are established, which characterize the change in the intensity of intermolecular interaction with an increase in the bromine content in the plasticizer. It is shown that the activation energy of the viscous flow decreases by 12% with an increase in temperature and an increase in bromine content. The heat of evaporation of the plasticizer components within 100 kJ/mol was determined. The value of a complex indicator is obtained, taking into account the combined effect of bromine content and temperature on viscosity in the range of 25-26 kJ/mol, which confirms the provisions of the activation theory for linear low-molecular hydrocarbons. It was found that the degree of influence of the bromine content in the plasticizer on its viscosity in the established temperature range is 3.3 – 4.1%. It is shown that an increase in the degree of bromination of a phthalate-type plasticizer contributes to an additional intermolecular interaction that contributes to an increase in kinematic viscosity.

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Section: Introductionunclassified

Study of the Viscosity of a Bromine -Containing Plasticizer From Production Waste

2022

Izv. Vyssh. Uchebn. Zaved. Khim. Khim. Tekhnol.

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“…Основные изменения по логике исследования должны состоять в образовании изомерных эфиров о-фталевой кислоты вследствие присоединения брома по двойным углеродуглеродным связям [2]. Методы Установление структуры органических соединений, в том числе идентификация отдельных компонентов многокомпонентной смеси является длительной и трудоемкой работой [3][4][5][6], требующей специального приборного обеспечения.…”

Section: Introductionunclassified

Investigation of the properties of the brominated phthalate-containing system and determination of its application areas

Плотникова

2021

Vestn. Voronež. gos. univ. inž. tehnol.

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The structure of a multicomponent system including phthalic acid esters has been studied using the methods of infrared spectroscopy and proton magnetic resonance. The obtained spectrograms are analyzed, indicating the presence of peaks corresponding to certain radicals present in the assumed structure of the main organic compounds of the multicomponent system. The presence of bromine atoms in the radicals of the molecules that make up the phthalate-containing system is established. The structure of the molecules of the basic component of the brominated system is shown. Spectral studies have confirmed the classical model of bromine addition at the site of double carbon-carbon bonds in the phthalate radical. It is established that the brominated multicomponent physico-chemical system is represented to a greater extent by esters of o-phthalic acid. The solubility parameter of the system under study is determined by the calculation method. The solubility parameter 35.3 (kJ/m3)0.5 was experimentally confirmed for a brominated phthalate-containing system. It is shown that the Small formula used to calculate the parameters of individual substances can be used to estimate the parameters of complex multicomponent systems. Polymer materials with the minimum values of deviations in the solubility parameter with the system under study, for which ~±1.5, are determined. It is established that the system under study can be used as an effective plasticizer of polybutyl acrylate, polyisoprene, polyvinyl chloride, and polyvinyl acetate.

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“…Наличие в исследуемом объекте, полученном из отходов производства, непредельных углерод-углеродных связей в алифатическом радикале предоставляет широкий спектр возможностей по его модификации с целью придания желаемых технических характеристик [4][5]. Так введение атомов брома по месту двойных углерод-углеродных связей [6] позволит придать новому продукту свойства замедлителя горения или пластификатора-антипирена [7][8][9][10].…”

Section: Introductionunclassified

Disadvantageous phthalates from production waste as the basis for the synthesis of plasticizer-antipyrin

Plotnikova

2021

Vestn. Voronež. gos. univ. inž. tehnol.

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The possibility of using unsaturated phthalates obtained by the esterification of phthalic anhydride with distillation residues of butyl alcohols as a basis for the synthesis of a bromine-containing plasticizer-fire retardant was evaluated. prene, polyvinyl chloride, and polyvinyl acetate. Instability of the content of unsaturated esters of phthalic acid in the test object was noted with the most probable range of fluctuations in iodine number, ranging from 24.4 to 44.4. A direct dependence of the indicated variation limits on the content of 2-ethylhexene-3-ol-1 in the distillation residue of butanol in the amount of 9.0-17.5% and 2-ethylhexen-2-ol in the amount of 35-43% was established. The ratio of unsaturated esters of 2-ethylhexyl-2-ethylhexene-3-phthalate and 2-ethylhexyl-2-ethylhexene-2-phthalate in an unsaturated plasticizer is 1: 2 ÷ 5. It has been shown that with a shortage in production of a brominated plasticizer with a low bromine content, its required amount can be obtained by diluting a brominated plasticizer with a high bromine content. Dioctyl phthalate and the investigated unsaturated plasticizer were proposed as diluents. It is noted that with incomplete bromination of an unsaturated base, unsaturated esters do not adversely affect the quality of the compositions, make the bromine-containing system more reactive, which leads to additional crosslinking of polymer molecules and an increase in the strength of the composition. It is shown that the modification of an unsaturated plasticizer by bromination will make it possible to obtain a triple effect of inhibition of the combustion process due to the elimination of hydrogen bromide from brominated ethers, an increase in the duration of its elimination and the ability of unsaturated ethers to react with active radicals released during thermal decomposition and combustion of polymer compositions.

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New plasticizers for cellulose esters

Cited by 3 publications

References 1 publication

Study of the Viscosity of a Bromine -Containing Plasticizer From Production Waste

Study of the Viscosity of a Bromine -Containing Plasticizer From Production Waste

Investigation of the properties of the brominated phthalate-containing system and determination of its application areas

Disadvantageous phthalates from production waste as the basis for the synthesis of plasticizer-antipyrin

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