Assessment of physicomechanical properties of composite films based on a styrene-acrylic polymer, glycidyl ether, and a 3-aminopropyltriethoxysilane compatibilizer

Pasichnyk, Mariia; Semeshko, Olga; Kucher, Elena; Asaulyuk, Tatyana; Vasylenko, Viktoria; Hyrlya, Lyudmila

doi:10.15587/1729-4061.2020.216745

Cited by 3 publications

(1 citation statement)

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“…One of the most commonly used methods to avoid or minimize the plasticization process consists of crosslinking the polymer chains, which reduces their mobility and restricts the volume increase in the membrane due to the presence of condensable gases [29][30][31][32][33][34][35]. Furthermore, crosslinking produces improvements in the chemical stability of polymers [36,37], as has been described not only in gas separation processes [29,38,39] but also in other separation processes, such as pervaporation [40,41].…”

Section: Introductionmentioning

confidence: 99%

Aromatic Polyimide Membranes with tert-Butyl and Carboxylic Side Groups for Gas Separation Applications—Covalent Crosslinking Study

et al. 2022

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A set of aromatic copolyimides was obtained by reaction of 4,4′-(hexafluoroisopropylidene) diphthalic anhydride (6FDA), and mixtures of the diamines 1,4-bis(4-amino-2-trifluoromethylphenoxy)-2,5-di-tert-butylbenzene (CF3TBAPB) and 3,5-diamino benzoic acid (DABA). These polymers were characterized and compared with the homopolymer derived from 6FDA and CF3TBAPB. All copolyimides showed high molecular weight values and good mechanical properties. The presence of carboxylic groups in these copolymers allowed their chemical crosslinking by reaction with 1,4-butanediol. Glass transition temperatures (Tg) were higher than 260 °C, showing the non-crosslinked copolyimides had the highest Tg values. Degradation temperature of crosslinked copolyimides was lower than their corresponding non-crosslinked ones. Mechanical properties of all polymers were good, and thus, copolyimide (precursor, and crosslinked ones) films could be tested as gas separation membranes. It was observed that CO2 permeability values were around 100 barrer. Finally, the plasticization resistance of the crosslinked material having a large number of carboxylic groups was excellent.

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Section: Introductionmentioning

confidence: 99%

Aromatic Polyimide Membranes with tert-Butyl and Carboxylic Side Groups for Gas Separation Applications—Covalent Crosslinking Study

et al. 2022

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The linguocultural aspect of language teaching based on the linguistic picture of the world in films

Assanbayeva,

Sarekenova,

Sutzhanov

et al. 2024

Scientific Herald of Uzhhorod University Series Physics

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Relevance. An important role in learning a new language and the development of a language personality is played by acquaintance with the worldview of its native speakers and familiarization with their culture. Any language reflects the way of perception and conceptualization of the surrounding world by its native speakers. Purpose. This study aims to investigate the linguocultural aspect of language teaching based on the linguistic picture of the world presented in films, and to demonstrate the advantages of using film discourse for conveying national cultural values and concepts to students. Methodology. An experiment was conducted with two groups of students (Group A and Group B) studying the Kazakh language. Group A was shown an animated film from the “Funny Adventures of Aldar Kose” series, while Group B was provided with a written text version of the same story. Both groups were then given the same set of test questions to assess their comprehension, interest level, and ability to identify cultural concepts reflected in the material. Results. The results showed that Group A, who watched the animated film, found the material more interesting and had a better understanding of the main idea compared to Group B. Group A also demonstrated slightly better memorization of character descriptions and cultural concepts presented in the film. Both groups were able to identify concepts related to Kazakh culture and worldview, such as “кебенек” (a curse word for goats), “жаназа” (funeral prayer), and the importance of keeping promises. Conclusions. The study concludes that the use of film discourse in language teaching offers significant advantages. The experiment highlights the potential of films in providing linguocultural and regional education to students, facilitating a deeper understanding and assimilation of cultural concepts alongside language learning.

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Methods of professionally-oriented teaching of physics to students of technical universities

Zhanbekova,

Kozybay,

Nurakhmetova

et al. 2024

Scientific Herald of Uzhhorod University Series Physics

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Relevance. The study of technical, and especially physical, education at the secondary and higher education levels in recent years has focused more on the exploration of concepts or understanding than on the development of skills and values. The least attention was paid to the development of values. Teaching physics in lectures often emphasises concepts and their interrelation, while the laboratory class also focuses on the development of laboratory skills. Purpose. The purpose of the study is to investigate the methods of professionally-oriented teaching of physics to students of technical universities. Methodology. Systematic review can be explained as a research method and process for identifying and critically evaluating relevant studies, and for collecting and analysing data from these studies. When promoting physics among the population and encouraging students to pursue a career in physics, emphasis is usually placed on developing the ability to solve problems in physics. In the review of the value of the physics diploma, graduates of the technical university emphasised the importance of skills in their profession. Results. It is assumed that with the help of an interactive way of teaching physics, it would be possible to eliminate students' misconceptions, reduce the dropout rate of first-year students, and also increase the level of students' knowledge in introductory general physics courses, mainly in the field of mechanics. Conclusions. The concept of "knowledge in motion" combined with theories in the workplace can offer a useful conceptual union for studying the nature of professional knowledge, which is taught to students of technical specialities after vocational education and training courses. This suggests that professional knowledge, rather than as a dichotomy, is perhaps more correctly viewed as distributed and networked.

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Assessment of physicomechanical properties of composite films based on a styrene-acrylic polymer, glycidyl ether, and a 3-aminopropyltriethoxysilane compatibilizer

Cited by 3 publications

References 10 publications

Aromatic Polyimide Membranes with tert-Butyl and Carboxylic Side Groups for Gas Separation Applications—Covalent Crosslinking Study

Aromatic Polyimide Membranes with tert-Butyl and Carboxylic Side Groups for Gas Separation Applications—Covalent Crosslinking Study

The linguocultural aspect of language teaching based on the linguistic picture of the world in films

Methods of professionally-oriented teaching of physics to students of technical universities

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