kaz44Вестник Университета Шакарима. Серия технические наукиBulletin of Shakarim University. Technical Sciences2788-79953006-0524«Шәкәрім университеті» КеАҚ10.53360/2788-7995-2026-2(22)-70kaz44-2494Research ArticleХИМИЧЕСКАЯ ТЕХНОЛОГИЯИССЛЕДОВАНИЕ ВЛИЯНИЯ УФ-ОБЛУЧЕНИЯ НА НЕНАСЫЩЕННЫЕ ПОЛИЭФИРНЫЕ СМОЛЫ, ПОЛУЧЕННЫЕ В ПРОЦЕССЕ «ХОЛОДНОГО» ОТВЕРЖДЕНИЯ АКРИЛОВОЙ КИСЛОТОЙRESEARCH OF THE EFFECT OF UV-IRRADIATION ON UNSATURATED POLYESTER RESINS OBTAINED IN THE PROCESS OF «COLD» CURING WITH ACRYLIC ACIDhttps://orcid.org/0000-0003-1993-7648БуркееваГ. К.BurkeyevаG. K.

Гульсым Кабаевна Буркеева ‒ PhD, ассоц. профессор, 

100026, Караганда, Университетская, 28

Gulsym Kabayevna Burkeyevа – PhD, Associate Professor of Chemical Sciences,

100026, Karaganda, 28, Universitetskaya Street 

guls_b@mail.ruhttps://orcid.org/0000-0001-9758-648XКовалеваА. К.KovalevaA. K.

Анна Константиновна Ковалева ‒ PhD, ведущий научный сотрудник, 

100026, Караганда, Университетская, 28

Anna Konstantinovna Kovaleva – PhD, Lead researcher, 

100026, Karaganda, 28, Universitetskaya Street 

cherry-girl1899@mail.ruhttps://orcid.org/0009-0004-5318-0110ЖұмабекН. М.ZhumabekN. M.

Нұркен Мейрамұлы Жұмабек – магистрант 2-го курса, 

100026, Караганда, Университетская, 28

Nurken Meiramuly Zhumabek – 2nd year master student, 

100026, Karaganda, 28, Universitetskaya Street 

zhumabek2003@list.ruhttps://orcid.org/0000-0002-1419-1384ИбраеваЖ. М.IbrayevaZ. M.

Жансая Мирханкызы Ибраева – ст. преподаватель, 

100026, Караганда, Университетская, 28

Zhansaya Mirkhankyzy Ibrayeva – Senior Lecturer,

100026, Karaganda, 28, Universitetskaya Street 

zhansaya.ibraieva@mail.ruКарагандинский национальный исследовательский университет им. Е.А. БукетоваКазахстанKaraganda National Research University named after аcademician Ye.A. BuketovKazakhstan20262907202602(22)689696Copyright © Буркеева Г.К., Ковалева А.К., Жұмабек Н.М., Ибраева Ж.М., 20262026Буркеева Г.К., Ковалева А.К., Жұмабек Н.М., Ибраева Ж.М.Burkeyevа G.K., Kovaleva A.K., Zhumabek N.M., Ibrayeva Z.M.Данная работа распространяется под лицензией Creative Commons Attribution 4.0.This work is licensed under a Creative Commons Attribution 4.0 License.https://tech.vestnik.shakarim.kz/jour/article/view/2494

Изучение влияния ультрафиолетового облучения на полимеры является важным и актуальным направлением науки и техники, поскольку позволяет разрабатывать новые подходы к созданию более долговечных и эффективных материалов. В данной работе рассматриваются изменения, происходящие в полимерах на основе ненасыщенных полиэфиров при длительном воздействии ультрафиолетового излучения. Целью исследования являлось изучение влияния продолжительного УФ-облучения на термическую стабильность полимерных материалов на основе полиэтиленгликольмалеината и полипропиленгликольмалеината, отвержденных акриловой кислотой при соотношении компонентов ~70:30 масс.%. Образцы исследовались методом микроскопии для выявления микротрещин, возникающих в результате воздействия УФ-излучения. Дополнительно проводилась визуальная оценка изменения окраски и появления мутности исследуемых материалов. Дополнительно для количественной оценки степени фотоокислительной деградации полимеров определялся карбонильный индекс. Данный показатель характеризует накопление карбонильных групп, образующихся в результате разрушения полимерной цепи под действием ультрафиолетового излучения, и позволяет оценить глубину протекания процессов фотостарения материалов. Термическая стабильность сополимеров определялась методом термогравиметрического анализа путем установления температуры начала термической деформации до и после УФ-облучения образцов в течение 21 суток. Полученные результаты показали, что полимер, синтезированный на основе полиэтиленгликольмалеината, демонстрирует более выраженное снижение температуры начала термической деформации после УФ-облучения в сравнении с сополимером на основе полипропиленгликольмалеината, что свидетельствует о более высокой устойчивости последнего к деградации, обусловленной УФ-облучением.

The investigation of the influence of UV irradiation on polymers represents an important and relevant area of science and technology, as it enables the development of new approaches for designing more durable and efficient materials. This work examines the changes occurring in polymers based on unsaturated polyesters under prolonged exposure to ultraviolet radiation. The objective of the study was to evaluate the effect of long-term UV irradiation on the thermal stability of polymeric materials based on polyethylene glycol maleate and polypropylene glycol maleate copolymerized with acrylic acid at a component ratio of approximately 70:30 wt.%. The samples were examined using microscopy to identify microcracks formed as a result of UV exposure. In addition, visual assessment of color variation and the appearance of turbidity in the studied materials was performed. Additionally, the carbonyl index was determined to quantitatively evaluate the degree of photooxidative degradation of the polymers. This parameter characterizes the accumulation of carbonyl groups formed as a result of polymer chain scission under UV irradiation and allows estimation of the extent of photodegradation processes in the materials. The obtained results demonstrate that the polymer synthesized on the basis of polyethylene glycol maleate exhibited a more pronounced decrease in the onset temperature of thermal deformation after UV exposure compared with the copolymer based on polypropylene glycol maleate, indicating higher resistance of the latter to UV-induced degradation. The thermal stability of the copolymers was evaluated by thermogravimetric analysis through determination of the onset temperature of thermal deformation before and after 21 days of UV irradiation.

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