THE RESEARCH OF CONDITIONS FOR THE FORMATION OF PHENOL FORMALDEHYDE RESINS MODIFIED WITH HYDROXYL CONTAING POLYETHER POLYOL-Reference-Cited by-同舟云学术

THE RESEARCH OF CONDITIONS FOR THE FORMATION OF PHENOL FORMALDEHYDE RESINS MODIFIED WITH HYDROXYL CONTAING POLYETHER POLYOL

Published:2020-06-20 Issue: Volume: Page:52-56
ISSN:2181-1121
Container-title:CHEMISTRY AND CHEMICAL ENGINEERING
language:en
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Abstract

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.

Publisher

Uzbekistan Research Online

Subject

General Medicine

Reference20 articles.

1. Kazuhisa Hirano., Masakatsu Asami. Phenolic resins – 100 years of progress and their future. Reactive & Functional Polymers, 2013, vol. 73, no. 4, pp. 256-269. doi: 10.1016/j.reactfunctpolym.2012.07.003.

2. Machulenko L.N., Nechaev A.I., Salazkin L.I. Sintez i svoystva fenolformal'degidnykh sopolimerov rezol'nogo tipa, soderzhashchikh ftalidnyye i ftalimidinovyye gruppy [Synthesis and properties of phenol-formaldehyde resole copolymers containing phthalide and phthalimidine groups]. Plasticheskiye massy, 2007, no. 12, pp. 16-19.

3. Machulenko L.N., Nechaev A.I., Salazkin L.I., Sintez fenolformal'degidnykh sopolimerov na osnove ftalidsoderzhashchego monofenole [Synthesis of phenol-formaldehyde copolymers based on phthalide-containing monophenol]. Plasticheskiye massy, 2009, no.9, pp. 20-24.

4. Machulenko L.N., Nechaev A.I., Salazkin L.I., Sintez fenolformal'degidnykh sopolimerov na osnove ftalidsoderzhashchego monofenola [Synthesis of phenol-formaldehyde copolymers based on phthalide-containing monophenol]. Plasticheskiye massy, 2011, no. 4, pp. 16-20.

5. Machulenko L.N., Nechaev A.I., Salazkin L.I., Sintez fenolformal'degidnykh sopolimerov na osnove ftalidsoderzhashchego difenola [Synthesis of phenol-formaldehyde copolymers based on phthalide-containing diphenol]. Plasticheskiye massy, 2009, no. 12, pp. 37-41.