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Lazareva, Nadezhda, Vasilev, Andrey, Kapitonova, Iuliia, Tarasova, Praskovia, Ushkanov, Alexander, Sivtseva-Gladkina, Natalia, Okhlopkova, Aitalina, Stolin, Alexander, Averichev, Oleg. (1405). Climatic Testing of Polytetrafluoroethylene Based Composites. هنرهای کاربردی, (), -. doi: 10.22075/macs.2026.37466.1837
Nadezhda Lazareva; Andrey Vasilev; Iuliia Kapitonova; Praskovia Tarasova; Alexander Ushkanov; Natalia Sivtseva-Gladkina; Aitalina Okhlopkova; Alexander Stolin; Oleg Averichev. "Climatic Testing of Polytetrafluoroethylene Based Composites". هنرهای کاربردی, , , 1405, -. doi: 10.22075/macs.2026.37466.1837
Lazareva, Nadezhda, Vasilev, Andrey, Kapitonova, Iuliia, Tarasova, Praskovia, Ushkanov, Alexander, Sivtseva-Gladkina, Natalia, Okhlopkova, Aitalina, Stolin, Alexander, Averichev, Oleg. (1405). 'Climatic Testing of Polytetrafluoroethylene Based Composites', هنرهای کاربردی, (), pp. -. doi: 10.22075/macs.2026.37466.1837
Lazareva, Nadezhda, Vasilev, Andrey, Kapitonova, Iuliia, Tarasova, Praskovia, Ushkanov, Alexander, Sivtseva-Gladkina, Natalia, Okhlopkova, Aitalina, Stolin, Alexander, Averichev, Oleg. Climatic Testing of Polytetrafluoroethylene Based Composites. هنرهای کاربردی, 1405; (): -. doi: 10.22075/macs.2026.37466.1837

Climatic Testing of Polytetrafluoroethylene Based Composites

Mechanics of Advanced Composite Structures
مقالات آماده انتشار، پذیرفته شده، انتشار آنلاین از تاریخ 28 خرداد 1405    اصل مقاله (1.01 M)
نوع مقاله: Research Article
شناسه دیجیتال (DOI): 10.22075/macs.2026.37466.1837
نویسندگان
Nadezhda Lazareva* 1؛ Andrey Vasilev1؛ Iuliia Kapitonova1؛ Praskovia Tarasova1؛ Alexander Ushkanov1؛ Natalia Sivtseva-Gladkina1؛ Aitalina Okhlopkova1؛ Alexander Stolin2؛ Oleg Averichev2
1Department of Chemistry, Institute of Natural Sciences, North-Eastern Federal University, Yakutsk, Russia
2Merzhanov Institute of Structural Macrokinetics and Materials Science Russian Academy of Sciences, Chernogolovka, Russia
تاریخ دریافت: 01 اردیبهشت 1404،  تاریخ بازنگری: 03 اردیبهشت 1405،  تاریخ پذیرش: 28 خرداد 1405 
چکیده
This study investigates the effects of accelerated climatic cycling (–50 °C to +100 °C, 10 cycles) on polytetrafluoroethylene (PTFE) composites filled with carbon fibers, carbon nanotubes (CNT), kaolinite (K), silicon dioxide SiO2, titanium carbide (TiC), and titanium diboride (TiB2). Mechanical tests revealed that unfilled PTFE lost ~20% of its tensile strength after testing, while composites with micrometer-sized fillers (CF, TiC, TiB2) degraded by ~30%. In contrast, the PTFE+CNT+K composite retained its tensile strength and modulus of elasticity without significant change, demonstrating superior stability. Structural analysis showed that nanofillers (CNT, K, SiO2) promote the formation of dense spherulite-like structures, which reduce the coefficient of linear thermal expansion (CLTE) by up to 45% compared to neat PTFE. Sealing performance tests at –40 °C confirmed that PTFE+CNT+K and PTFE+SiO2 composites maintained effective sealing, whereas neat PTFE and PTFE+K composites exhibited significant leakage. The results highlight the PTFE+CNT+K composite as the most promising material for sealing applications in arctic conditions due to its balanced mechanical integrity, low CLTE, and reliable performance under extreme thermal cycling.
کلیدواژه‌ها
polytetrafluoroethylene؛ polymer composite materials؛ mechanical properties؛ climatic testing
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