resarПриродные ресурсы Арктики и СубарктикиArctic and Subarctic Natural Resources2618-97122686-9683Академия наук Республики Саха (Якутия)10.31242/2618-9712-2020-25-2-12resar-252Research ArticleМеталлургия и материаловедение. МатериаловедениеMetallurgy and materials science. Materials scienceВлияние модифицированного серицита на свойства и структуру политетрафторэтиленаInfluence of modified sericite on the properties and structure of polytetrafluoroethylenehttps://orcid.org/0000-0001-7699-533XВасильевА. П.VasilevA. P.

ВАСИЛЬЕВ Андрей Петрович, ведущий инженер, Институт естественных наук

677000, Якутск, ул. Белинского, 58

VASILEV Andrey Petrovich, leading engineer, Institute of Natural Sciences

677000, Yakutsk, 58 Belinsky str.

gtvap@mail.ruhttps://orcid.org/0000-0003-0691-7066ОхлопковаА. А.OkhlopkovaA. A.

ОХЛОПКОВА Айталина Алексеевна, доктор  технических наук, профессор, главный научный  сотрудник, УНТЛ «Технологии полимерных нанокомпозитов», Институт естественных наук

677000, Якутск, ул. Белинского, 58

OKHLOPKOVA Aitalina Alekseevna, doctor of technical sciences, professor, chief researcher at the Laboratory of Technologies of Polymer Nanocomposites, Institute of Natural Science

677000, Yakutsk, 58 Belinsky str.,

okhlopkova@yandex.ruhttps://orcid.org/0000-0002-6469-1491СтручковаТ. С.StruchkovaT. S.

СТРУЧКОВА Татьяна Семеновна, кандидат технических наук, доцент, Институт естественных наук

677000, Якутск, ул. Белинского, 58

STRUCHKOVA Tatiana Semenovna, candidate of technical sciences, associate professor of the ChemicalDepartment, Institute of Natural Sciences

677000, Yakutsk, 58 Belinsky str.

sts_23@mail.ruАлексеевА. Г.AlekseevA. G.

АЛЕКСЕЕВ Алексей Гаврильевич, старший  преподаватель, Институт естественных наук

677000, Якутск, ул. Белинского, 58

ALEKSEEV Aleksey Gavrilievich, senior lecturer at the Chemical Department, Institute of Natural Sciences

677000, Yakutsk, 58 Belinsky str.

alexalekseev.z@gmail.comФГАОУ ВО «Северо-Восточный федеральный университет имени М.К. Аммосова»РоссияNorth-Eastern Federal University named after M. K. AmmosovRussian Federation202030092023252147156Copyright © Васильев А.П., Охлопкова А.А., Стручкова Т.С., Алексеев А.Г., 20232023Васильев А.П., Охлопкова А.А., Стручкова Т.С., Алексеев А.Г.Vasilev A.P., Okhlopkova A.A., Struchkova T.S., Alekseev A.G.Данная работа распространяется под лицензией Creative Commons Attribution 4.0.This work is licensed under a Creative Commons Attribution 4.0 License.https://resar.elpub.ru/jour/article/view/252

Приведены результаты исследования модифицирования политетрафторэтилена (ПТФЭ) минеральным силикатом (серицитом) и его влияние на физико-механические, триботехнические свойства и структурные параметры. При создании полимерного композиционного материала (ПКМ) использовали два способа: механическую и термическую активацию природного силиката перед смешением с полимером. ПТФЭ, наполненный термически активированным серицитом, характеризуется более высокими значениями физико-механических и триботехнических показателей по сравнению с композитами, содержащими механоактивированный наполнитель. Методом рентгеноструктурного анализа установлено, что модифицирование ПТФЭ механоактивированным серицитом приводит к увеличению степени кристалличности ПКМ, а использование термически активированного наполнителя сопровождается снижением кристалличности. Выявлена корреляционная зависимость между степенью кристалличности и средними размерами кристаллитов композитов в зависимости от содержания наполнителя. Методом ИК-спектроскопии установлено протекание трибохимических реакций при фрикционном контакте композитов с контртелом, способствующих формированию поверхностного слоя, локализующего сдвиговые деформации и защищающего материал от изнашивания.

This paper presents the results of the investigation of polytetrafluoroethylene (PTFE) modification with mineral silicate (sericite) and its effect on the physicomechanical, tribotechnical properties and structural parameters. Two methods were used to develop a polymer composite material (PCM): mechanical and thermal activation of natural silicate before mixing with the polymer. It was shown that PTFE filled with thermally activated sericite is characterized by higher physicomechanical and tribotechnical parameters in comparison with the composites containing mechanically activated filler. By means of X-ray diffraction analysis, it was found that the modification of PTFE with mechanically activated sericite leads to an increase in the degree of crystallinity of PCM, and the use of thermally activated filler is accompanied by a decrease in crystallinity. A correlation between the degree of crystallinity and the average crystallite size of the composites was revealed, depending on the filler content. IR spectroscopy established the occurrence of tribochemical reactions during the frictional contact of the composites with the counterbody, contributing to the formation of a surface layer localizing shear deformations and protecting the material from wear.

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The authors declare that there are no conflicts of interest present.