The Synthesis and Properties of Novolacs Based on Ternary Mixtures Containing Phenol, Phenolphthalein, and Phthalimidine-containing Bisphenols and of Crosslinked Copolymers Based on them

Machulenko, L. N.; Nechaev, A. I.; Donetskaya, S.A.; Potopaeva, A.A.; Салазкин, С. Н.; Klemenkova, Zinaida S.; Бузин, М. И.

doi:10.1177/0307174x1704400406

Cited by 2 publications

(1 citation statement)

References 3 publications

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“…In recent years, new phenol-formaldehyde novalacs have been worked out that are used for the synthesis of cross-linked copolymers by the interaction of formaldehyde with mixtures of phenol, phenolphthalein (or phthal-containing monophenol) and m-cresol [9] or formaldehyde with mixtures of phenol, phenolphthalene and phthalimide-containing bis-phenols in the presence of an acid catalyst [10].…”

Section: Introductionmentioning

confidence: 99%

Purification of Water Systems From Uranium Salts Using Acrylonitrile-Structured Triple Co-Oligomers of 4-Isopropenil-Phenol, Formaldehyde and 4-(1-Methyl)-1-Dimetoxsi-Phosphorylethyl)phenol

Bairamov¹,

Guliyeva²,

Mehdiyeva³

et al. 2023

AChJ

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The article presents the results of three-component condensation of 4-isopropenylphenol, formaldehyde and 4-(1-methyl)-1-dimethoxsiphosphorylethyl)phenol cooligomers, their structuring with acrylonitrile. In order to include the carboxyl group in the structure of the cross-linked copolymer, hydrolysis was carried out in the presence of an aqueous solution of potassium hydroxide. The process of sorption of uranyl ions from model aqueous systems by structured (crosslinked) with acrylonitrile and their product of hydrolyze. The structure of the cross-linked copolymer was confirmed by IR spectroscopy data. It has been established that the process of sorption of uranyl ions is significantly affected by the pH of the medium. The best results in the extraction of uranyl ions by the sorbent are achieved at pH 7–8 (at room temperature, the degree of their sorption is ~89–93%, and SCS is ~229–239 mg/g). It has been established that the process is completed within 24 hours, cross-linked co-oligomers can be reused after desorption of uranyl ions by mineral acids

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Section: Introductionmentioning

confidence: 99%

Purification of Water Systems From Uranium Salts Using Acrylonitrile-Structured Triple Co-Oligomers of 4-Isopropenil-Phenol, Formaldehyde and 4-(1-Methyl)-1-Dimetoxsi-Phosphorylethyl)phenol

Bairamov¹,

Guliyeva²,

Mehdiyeva³

et al. 2023

AChJ

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The Research of Conditions for the Formation of Phenol Formaldehyde Resins Modified With Hydroxyl Containg Polyether Polyol

2020

Chemistry and Chemical Engineering

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The aim of the study was to study the conditions of copolycondensation of phenol alcohol with hydroxyl-containing polyether polyol in the presence of maleic anhydride chain extender in order to obtain modified thermoset phenolic-formaldehyde oligomers. Investigation of the dependence of the content of free phenol, formaldehyde and methylol groups on time during the synthesis of the modified phenol-formaldehyde resin with the ratios hydroxyl-containing polyether polyol:phenol alcohol 1:60 mol/mol and 1:100 mol/mol. It was revealed that maleic anhydride, present in the reaction medium as a copolycondensation catalyst, also participates in copolycondensation reactions as a chain extender. Moreover, as the molar fraction of phenol alcohol increases in the synthesis, an increase in the amount of maleic anhydride involved as a chain extender and an increase in the molecular weight of the resulting modified phenol-formaldehyde oligomer are observed.

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The Synthesis and Properties of Novolacs Based on Ternary Mixtures Containing Phenol, Phenolphthalein, and Phthalimidine-containing Bisphenols and of Crosslinked Copolymers Based on them

Abstract: By the interaction of formaldehyde with mixtures of phenol, phenolphthalein, and phthalimidine-containing bisphenols in the presence of an acidic catalyst, new co-oligophenol formaldehyde novolacs and crosslinked copolymers based on them are produced. Their properties are studied.

Cited by 2 publications

References 3 publications

Purification of Water Systems From Uranium Salts Using Acrylonitrile-Structured Triple Co-Oligomers of 4-Isopropenil-Phenol, Formaldehyde and 4-(1-Methyl)-1-Dimetoxsi-Phosphorylethyl)phenol

Purification of Water Systems From Uranium Salts Using Acrylonitrile-Structured Triple Co-Oligomers of 4-Isopropenil-Phenol, Formaldehyde and 4-(1-Methyl)-1-Dimetoxsi-Phosphorylethyl)phenol

The Research of Conditions for the Formation of Phenol Formaldehyde Resins Modified With Hydroxyl Containg Polyether Polyol

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