The study of the influence of carbon nanoparticles of various types on the processes of thermal aging of composite films based on heat-resistant polyimides
| Jazyk: | ruština |
|---|---|
| Rok vydání: | 2022 |
| Předmět: |
полиимидÑ
ÑеÑмоÑÑабилÑноÑÑÑ Ð½Ð°Ð½Ð¾ÐºÐ¾Ð¼Ð¿Ð¾Ð·Ð¸ÑÑ ÑеÑмиÑеÑкие ÑвойÑÑва nanocomposites thermal properties polyimides thermal aging ÑеÑмиÑеÑкое ÑÑаÑение mechanical properties Ð¼ÐµÑ Ð°Ð½Ð¸ÑеÑкие ÑвойÑÑва thermal stability |
| DOI: | 10.18720/spbpu/3/2023/vr/vr23-332 |
| Popis: | Тема вÑпÑÑкной квалиÑикаÑионной ÑабоÑÑ: ÐÑÑледование влиÑÐ½Ð¸Ñ ÑглеÑоднÑÑ Ð½Ð°Ð½Ð¾ÑаÑÑÐ¸Ñ ÑазлиÑного Ñипа на пÑоÑеÑÑÑ ÑеÑмиÑеÑкого ÑÑаÑÐµÐ½Ð¸Ñ ÐºÐ¾Ð¼Ð¿Ð¾Ð·Ð¸ÑнÑÑ Ð¿Ð»ÐµÐ½Ð¾Ðº на оÑнове ÑеÑмоÑÑÐ¾Ð¹ÐºÐ¸Ñ Ð¿Ð¾Ð»Ð¸Ð¸Ð¼Ð¸Ð´Ð¾Ð².               ÐÑÑÐ»ÐµÐ´Ð¾Ð²Ð°Ð½Ð¸Ñ ÑпоÑобов модиÑикаÑии пленоÑнÑÑ Ð½Ð°Ð½Ð¾ÐºÐ¾Ð¼Ð¿Ð¾Ð·Ð¸ÑнÑÑ Ð¼Ð°ÑеÑиалов на оÑнове геÑеÑоаÑомаÑиÑеÑÐºÐ¸Ñ Ð¿Ð¾Ð»Ð¸Ð¸Ð¼Ð¸Ð´Ð¾Ð² (PI) кÑиÑиÑеÑки Ð²Ð°Ð¶Ð½Ñ Ð´Ð»Ñ Ð¼Ð½Ð¾Ð¶ÐµÑÑва оÑÑаÑлей ÑовÑеменной ÑÐµÑ Ð½Ð¸ÐºÐ¸. ÐлагодаÑÑ Ð²ÑÑоким ÑеÑмиÑеÑким и Ð¼ÐµÑ Ð°Ð½Ð¸ÑеÑким ÑвойÑÑвам, Ñ Ð¸Ð¼Ð¸ÑеÑкой и ÑадиаÑионной ÑÑойкоÑÑи, низкой диÑлекÑÑиÑеÑкой пÑониÑаемоÑÑи, малÑм знаÑениÑм коÑÑÑиÑиенÑов Ñеплового ÑаÑÑиÑÐµÐ½Ð¸Ñ Ð½Ð°Ð½Ð¾ÐºÐ¾Ð¼Ð¿Ð¾Ð·Ð¸ÑÑ Ð½Ð° полиимидной оÑнове могÑÑ Ð±ÑÑÑ ÐºÑайне ÑÑÑекÑивно иÑполÑÐ·Ð¾Ð²Ð°Ð½Ñ Ð² ÑиÑоком ÑпекÑÑе пÑиложений.               РнаÑÑоÑÑей ÑабоÑе бÑло иÑÑледовано влиÑние ÑглеÑоднÑÑ Ð½Ð°Ð½Ð¾Ð²Ð¾Ð»Ð¾ÐºÐ¾Ð½ (CNF) и нанÑоÑÑбок (CNT), вводимÑÑ Ð² маÑÑиÑнÑй PI PMDA-ODA, на ÑÑабилÑноÑÑÑ Ð¼ÐµÑ Ð°Ð½Ð¸ÑеÑÐºÐ¸Ñ Ñ Ð°ÑакÑеÑиÑÑик нанокомпозиÑнÑÑ Ð¿Ð»ÐµÐ½Ð¾Ðº пÑи длиÑелÑном изоÑеÑмиÑеÑком воздейÑÑвии ÑемпеÑаÑÑÑ Ð² диапазоне 400-500 оС. ÐаноÑаÑÑиÑÑ Ð´Ð°Ð½Ð½Ð¾Ð³Ð¾ Ñипа ÑÑÑеÑÑвенно повÑÑаÑÑ Ð½Ð°ÑалÑнÑÑ Ð¼ÐµÑ Ð°Ð½Ð¸ÑеÑкÑÑ Ð¶ÐµÑÑкоÑÑÑ ÐºÐ¾Ð¼Ð¿Ð¾Ð·Ð¸Ñов, ÑÑо доÑÑигаеÑÑÑ Ð±Ð»Ð°Ð³Ð¾Ð´Ð°ÑÑ Ð²ÑÑокой ÑÑепени ÑовмеÑÐµÐ½Ð¸Ñ Ð¼Ð°ÑÑиÑÑ Ð¸ наполниÑелÑ: модÑÐ»Ñ ÑпÑÑгоÑÑи Ð´Ð»Ñ ÐºÐ¾Ð¼Ð¿Ð¾Ð·Ð¸Ñов, ÑодеÑжаÑÐ¸Ñ 2 об. % CNT и 5 об. % CNF, на 25 и 18 %, ÑооÑвеÑÑÑвенно. ÐÐ»Ñ Ð²ÑÑÐ²Ð»ÐµÐ½Ð¸Ñ Ñ Ð°ÑакÑеÑа и инÑенÑивноÑÑи влиÑÐ½Ð¸Ñ Ð½Ð°Ð½Ð¾ÑаÑÑÐ¸Ñ Ð½Ð° ÑÑабилÑноÑÑÑ Ð¼ÐµÑ Ð°Ð½Ð¸ÑеÑÐºÐ¸Ñ Ñ Ð°ÑакÑеÑиÑÑик бÑл пÑоведен ÑÑавниÑелÑнÑй анализ как наÑалÑнÑÑ Ð¼ÐµÑ Ð°Ð½Ð¸ÑеÑÐºÐ¸Ñ Ñ Ð°ÑакÑеÑиÑÑик маÑÑиÑного полимеÑа и нанокомпозиÑов на его оÑнове, Ñак и Ñ Ð°ÑакÑеÑиÑÑик, ÑооÑвеÑÑÑвÑÑÑÐ¸Ñ Ð¿Ð»ÐµÐ½Ð¾ÑнÑм обÑазÑам ÑÐµÑ Ð¶Ðµ ÑоÑÑавов, подвеÑгнÑÑÑÑ Ð¸Ð·Ð¾ÑеÑмиÑеÑÐºÐ¾Ð¼Ñ Ð²Ð¾Ð·Ð´ÐµÐ¹ÑÑÐ²Ð¸Ñ ÑазлиÑной длиÑелÑноÑÑи Ñ.е. ÑÐµÐ¿Ð»Ð¾Ð²Ð¾Ð¼Ñ ÑÑаÑениÑ.               РÑезÑлÑÑаÑе бÑло ÑÑÑановлено, ÑÑо в нанокомпозиÑнÑÑ Ð¿Ð»ÐµÐ½ÐºÐ°Ñ Ð¿ÑоÑеÑÑÑ ÑÑаÑÐµÐ½Ð¸Ñ Ð¿ÑоÑекаÑÑ Ð¼ÐµÐ½ÐµÐµ инÑенÑивно, Ñем в маÑÑиÑном PI: пÑоÑноÑÑÑ Ð¸ пÑеделÑÐ½Ð°Ñ Ð´ÐµÑоÑмаÑÐ¸Ñ ÐºÐ¾Ð¼Ð¿Ð¾Ð·Ð¸Ñов, ÑодеÑжаÑÐ¸Ñ ÐºÐ°Ðº CNF, Ñак и CNT, ÑнижаÑÑÑÑ Ð¼ÐµÐ´Ð»ÐµÐ½Ð½ÐµÐµ, Ñем ÑÑи же Ñ Ð°ÑакÑеÑиÑÑики пленки маÑÑиÑного полиимида. ÐÑо ÑказÑÐ²Ð°ÐµÑ Ð½Ð° налиÑие дополниÑелÑнÑÑ Ñизико-Ñ Ð¸Ð¼Ð¸ÑеÑÐºÐ¸Ñ Ð²Ð·Ð°Ð¸Ð¼Ð¾Ð´ÐµÐ¹ÑÑвий Ð¼ÐµÐ¶Ð´Ñ Ð¼Ð°ÐºÑоÑепÑми PI и повеÑÑ Ð½Ð¾ÑÑÑÑ Ð½Ð°Ð½Ð¾ÑаÑÑиÑ, оказÑваÑÑÐ¸Ñ ÑÑабилизиÑÑÑÑее дейÑÑвие на Ð¼ÐµÑ Ð°Ð½Ð¸ÑеÑкие Ñ Ð°ÑакÑеÑиÑÑики нанокомпозиÑов. The subject of the graduate qualification work is âThe study of the influence of carbon nanoparticles of various types on the processes of thermal aging of composite films based on heat-resistant polyimidesâ.               Research on modification methods of film nanocomposite materials based on heteroaromatic polyimides (PI) is critically important for many fields of modern technology. Due to their high thermal and mechanical properties, chemical and radiation resistance, low dielectric permittivity and low thermal expansion coefficients polyimide-based nanocomposites can be used extremely effectively in a wide range of applications.               In this graduate work, the effect of carbon nanofibers (CNF) and carbon nanotubes (CNT) introduced into the matrix PI PMDA-ODA on the stability of the mechanical characteristics of nanocomposite films under prolonged isothermal exposure to temperatures in the range of 400-500 oC was investigated. Nanoparticles of these types significantly increase the initial mechanical stiffness of the composites, which is achieved due to the high degree of compatibility of the matrix and filler: the modulus of elasticity for composites containing 2 vol. % CNT and 5 vol. % CNF, by 25 and 18 %, respectively. To reveal the nature and intensity of the influence of nanoparticles on the stability of mechanical characteristics, a comparative analysis was carried out both of the initial mechanical characteristics of the matrix polymer and nanocomposites based on it, and of the characteristics corresponding to film samples of the same compositions subjected to isothermal action of various durations, i.e., thermal aging.As a result, it was found that aging processes in nanocomposite films proceed less intensively than in matrix PI: the strength and ultimate strain of composites containing both CNF and CNT decrease more slowly than these characteristics of the matrix polyimide film. This indicates the presence of additional physicochemical interactions between the PI macrochains and the surface of the nanoparticles, which have a stabilizing effect on the mechanical characteristics of nanocompositeâs. |
| Databáze: | OpenAIRE |
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