SYNTHESIS AND PROPERTIES OF POLYETHYLENE-p-TRIPHENYLBORON ESTER

Lenskiy, Maxim A.; Корабельников, Д. В.; Ozhogin, Andrei V.; Novitskiy, Alexei N.; Шульц, Э. Э.

doi:10.6060/ivkkt20196207.5882

Cited by 3 publications

(9 citation statements)

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“…Взаимодействие гидрохинона с борной кислотой проводили при кипячении смеси в о-ксилоле c азеотропной отгонкой воды, аналогично работам [15,16]. В зависимости от соотношения гидрохинона и борной кислоты были получены полидиэфир 1 и политриэфир 2 гидрохинона и борной кислоты.…”

Section: результаты и их обсужденияunclassified

“…Исследовано взаимодействие полученных олигомеров 1-3 с формальдегидом в присутствии эфирата трехфтористого бора, в условиях описанных в работах [15,16], в результате которого были получены полиметиленэфиры гидрохинона и борной кислоты 4-6. H 2',4',6' .…”

Section: результаты и их обсужденияunclassified

“…1polydiester of hydroquinone and boric acid; 2polytriester of hydroquinone and boric acid; 3 polytriester of hydroquinone, phenol and boric acid; 4polymethylene diester of hydroquinone and boric acid; 5polymethylene triester hydroquinone and boric acid; 6polymethylene triester of hydroquinone, phenol and boric acid На рис. 3 представлены результаты отверждения олигомеров с серной системой отверждения при 220 °C и 8 ч экспозиции [16][17][18][19]. Максимальное содержание нерастворимой гель-фракции после отверждения составляет для 4 образца 94%, 5 -88%, 6 -80%, процесс отверждения заканчивается за 1,5 -2 ч. Отверждение образцов 1, 2 и 3 протекает сложнее соответствующих полиметиленэфиров, а максимальное содержание гель-фракции для них составляет 72, 68 и 78%, соответственно, процесс отверждения заканчивается за 1,5 ч.…”

Section: некоторые свойства синтезированных олигомеровunclassified

“…Отверждение олигомеров с эпоксидной смолой проводили по методике описанной в работах [16,20] при 150 °С. Соотношение олигомер:смола использовали 40:60.…”

Section: некоторые свойства синтезированных олигомеровunclassified

“…Отверждение происходит по аналогичной схеме, описанной в работе [16], что позволяет ис- пользовать их в качестве модифицирующих добавок к композиционным материалам на основе эпоксидной смолы.…”

Section: некоторые свойства синтезированных олигомеровunclassified

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Synthesis and Properties of Boron-Containing Oligomers Based on Hydroquinone and Boric Acid

Lenskiy¹,

Novitskiy²,

Корабельников³

et al. 2020

IVKKT

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By polyesterification of boric acid with hydroquinone in o-xylene with azeotropic distillation of water, polyesters of hydroquinone and boric acid are obtained. By adding equimolar amounts of phenol to the reaction between boric acid and hydroquinone, a mixed polyester of hydroquinone, phenol and boric acid is obtained. From the ratio of the integral intensity of phenol protons to hydroquinone protons, it was found that the addition of phenol to the hydroquinone polydiester and boric acid occurs by 80%. The synthesized polyesters reacted with formaldehyde using o-xylene as a solvent and a boron trifluoride etherate catalyst. By the method of end groups it was determined that all the compounds obtained have a small molecular weight and belong to the class of oligomers. The structure of the synthesized oligomers was confirmed by elemental analysis, IR and NMR (1H, 13C) spectroscopy. All compounds obtained have a good adhesion to glass, wood and metal. The thermal destruction of samples in a flow of nitrogen at 900 °C was studied, the residual mass for polyesters is from 49 to 53%, for polymethylene ester - from 18.5 to 31%. The residual mass during thermo-oxidative degradation in an air flow at 600 ° C for polyesters is from 62 to 65%, for polymethylene ester from 37 to 44%. The reaction of the modification of synthesized oligomers with a sulfur curing system and epoxy resin was studied. The maximum content of insoluble gel fraction when cured by sulfuric system at a temperature of 220 °C reaches 94% for polymethylene diester hydroquinone and boric acid, the minimum is 68% for the polytriester of hydroquinone and boric acid. The maximum content of insoluble gel fraction when cured with epoxy resin at a temperature of 150 °C for polyesters is in the range 52 - 66 %, for polymethylene ester 50 - 61%.

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Section: результаты и их обсужденияunclassified

Section: некоторые свойства синтезированных олигомеровunclassified

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Synthesis and Properties of Boron-Containing Oligomers Based on Hydroquinone and Boric Acid

Lenskiy¹,

Novitskiy²,

Корабельников³

et al. 2020

IVKKT

Self Cite

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Pyrocatechol borates: Synthesis, reaction with formaldehyde, and solvent effect on polycondensation process

Lenskiy

Шульц

Корабельников

et al. 2020

Polymer

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Reinforced Epoxy Binder Modified with Borpolymer

et al. 2023

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Polymer binders based on epoxy resins have unique properties that contribute to their use in many composite industries. The potential of using epoxy binders is due to their high elasticity and strength characteristics, thermal and chemical resistance, and resistance to climatic aging. This is the reason for the existing practical interest in modifying the composition of epoxy binders and understanding the strengthening mechanisms in order to form reinforced composite materials with a required set of properties based on them. This article presents the results of a study of the process of dissolving the modifying additive of polymethylene-p-triphenyl ether of boric acid in the components of an epoxyanhydride binder applicable to the production of fibrous composite materials. The temperature and time conditions for the dissolution of polymethylene-p-triphenyl ether of boric acid in anhydride-type isomethyltetrahydrophthalic anhydride hardeners are presented. It has been established that the complete dissolution of the borpolymer-modifying additive in iso-MTHPA occurs at a temperature of 55 ± 2 °C for 20 h. The effect of the modifying additive of polymethylene-p-triphenyl ether of boric acid on the strength properties and structure of the epoxyanhydride binder has been studied. Increases in transverse bending strength up to 190 MPa, elastic modulus up to 3200 MPa, tensile strength up to 0.8 MPa, and impact strength (Charpy) up to 5.1 5.1 kJ/m2 are observed when the content of the borpolymer-modifying additive in the composition of the epoxy binder is 0.50 mass. %.

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SYNTHESIS AND PROPERTIES OF POLYETHYLENE-p-TRIPHENYLBORON ESTER

Cited by 3 publications

References 0 publications

Synthesis and Properties of Boron-Containing Oligomers Based on Hydroquinone and Boric Acid

Synthesis and Properties of Boron-Containing Oligomers Based on Hydroquinone and Boric Acid

Pyrocatechol borates: Synthesis, reaction with formaldehyde, and solvent effect on polycondensation process

Reinforced Epoxy Binder Modified with Borpolymer

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