SYNTHESIS AND PROPERTIES OF POLYETHYLENE-p-TRIPHENYLBORON ESTER OF BORIC ACID

SYNTHESIS AND PROPERTIES OF POLYETHYLENE-p-TRIPHENYLBORON ESTER OF BORIC ACID Full article

Journal

Известия высших учебных заведений. Серия: Химия и химическая технология
ISSN: 0579-2991 , E-ISSN: 2500-3070

Output data

Year: 2019, Volume: 62, Number: 7, Pages: 31-37 Pages count : 7 DOI: 10.6060/ivkkt20196207.5882

Tags

esters and polymethylene esters of boric acid; vulcanization; curable materials

Authors

Lenskiy M.A. ¹ , Shul'ts E.E. ² , Korabel'nikov D., V ¹ , Ozhogin A., V ¹ , Novitskiy A.N. ¹

Affiliations

1	(Данные Web of science) Altay State Tech Univ, Biysk Technol Inst Branch, Dept Chem Technol Energy Saturated Mat & Prod, Trofimova St 27, Biisk 659305, Altai Region, Russia
2	(Данные Web of science) RAS, Siberian Branch, Novosibirsk Inst Organ Chem, Lab Med Chem, Akad Lavrentieva Ave 9, Novosibirsk 630090, Russia

Triphenyl ester of boric acid was obtained by esterification of boric acid and phenol in o-xylene with water azeotropic distillation, then it was purified by distillation in vacuo. This substance was used as a model compound for the development of a synthesis method for heat-resistant polymers based on polymethylene esters of phenols and boric acid. Reaction of triphenyl ester of boric acid with 1,3,5-trioxane (paraformaldehyde) gave a new boron-containing oligomer - polymethylene-p-triphenyl ester of boric acid. This oligomer was prepared both in the presence of a solvent and without a solvent in the melt of triphenyl ester of boric acid, since at a temperature of 101 degrees C it completely passes into a liquid state. The polycondensation reaction was carried out in both cases in an acidic medium. The advantage of the second method is obvious, since for the beginning of the polycondensation reaction, three times less catalyst was required than in the reaction using a solvent. The structure of the synthesized oligomer was confirmed by elemental analysis, IR and H-1, B-11 NMR spectroscopy. The modification reactions of polymethylene-p-triphenyl ester of boric acid with sulfur curing system, epoxy resin and urotropine were studied. In the IR spectra of modified materials, bands in the aromatic region, in particular those characteristic of disubstituted benzene, are observed to change bands characteristic of tri- and tetrasubstituted benzenes. Thus, the curing of polymethylene-p-triphenyl ester of boric acid occurs in the o-position of the phenyl ring to form three-dimensional structures. The noted curing reactions allow using polymethylene-p-triphenyl boronic acid ester as an independent thermally stable binder and as additives to composite materials.

Lenskiy M.A. , Shul'ts E.E. , Korabel'nikov D.,.V. , Ozhogin A.,.V. , Novitskiy A.N.
SYNTHESIS AND PROPERTIES OF POLYETHYLENE-p-TRIPHENYLBORON ESTER OF BORIC ACID

Известия высших учебных заведений. Серия: Химия и химическая технология. 2019. V.62. N7. P.31-37. DOI: 10.6060/ivkkt20196207.5882 WOS Scopus РИНЦ OpenAlex

Full text from publisher

Published online:

Jul 21, 2019

Web of science:	WOS:000477768400002
Scopus:	2-s2.0-85071086722
Elibrary:	41235349
OpenAlex:	W2978823797

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Web of science	4
Scopus	4
Elibrary	7
OpenAlex	3