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首页> 外文期刊>Polymer science, Series C >Influence of Nanosized Cerium Oxide on the Thermal Characteristics of Aromatic Polyimide Films
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Influence of Nanosized Cerium Oxide on the Thermal Characteristics of Aromatic Polyimide Films

机译：纳米氧化铈对芳族聚酰亚胺膜热特性的影响

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摘要

The influence of nanosized cerium oxide as an active filler on the mechanical properties and thermal stability indices and heat resistance of films of thermally stable aromatic polyimides of various chemical structures is studied. It is shown that, depending on the polyimide structure the introduction of cerium oxide nanoparticles into the film can lead to a noticeable increase or a significant decrease in the thermal stability of the material during thermo-oxidative degradation. It is found that the thermal stability of the films increases significantly when polyimides containing sulfonic groups in elementary units serve as matrix polymers. The introduction of cerium oxide nanoparticles into such polyimides leads to an increase in the thermal stability of the films in air by 20-40 degrees C. Moreover, in an inert medium the thermal stability indices for the films of matrix polymers and nanocomposites differ slightly. For all the studied polyimides, the introduction of cerium oxide does not cause a noticeable change in the glass transition temperature but in some cases leads to limitation of the compliance of the films in the temperature range above the glass transition.
机译：研究了纳米氧化铈作为活性填料对不同化学结构的热稳定芳香族聚酰亚胺薄膜的力学性能、热稳定性指数和耐热性的影响。结果表明，根据聚酰亚胺的结构，在薄膜中引入氧化铈纳米颗粒可导致材料在热氧化降解过程中的热稳定性显著增加或显著降低。研究发现，当基元中含有磺酸基的聚酰亚胺作为基体聚合物时，薄膜的热稳定性显著提高。在这种聚酰亚胺中引入氧化铈纳米颗粒会使薄膜在空气中的热稳定性提高20-40摄氏度。此外，在惰性介质中，基体聚合物和纳米复合材料薄膜的热稳定性指数略有不同。对于所研究的所有聚酰亚胺，氧化铈的引入不会引起玻璃化转变温度的显著变化，但在某些情况下，会限制薄膜在高于玻璃化转变温度范围内的顺应性。

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  • 来源
    《Polymer science, Series C》 |2020年第2期|共9页
  • 作者

    Gofman I. V.; Nikolaeva A. L.; Abalov I. V.; Ivankova E. M.; Kuntzman I. V.; Goikhman M. Ya.; Yakimansky A. V.; Kozlova T. O.; Baranchikov A. E.; Ivanov V. K.;

  • 作者单位

    Russian Acad Sci Inst Macromol Cpds St Petersburg 199004 Russia;

    Russian Acad Sci Inst Macromol Cpds St Petersburg 199004 Russia;

    Russian Acad Sci Inst Macromol Cpds St Petersburg 199004 Russia;

    Russian Acad Sci Inst Macromol Cpds St Petersburg 199004 Russia;

    Russian Acad Sci Inst Macromol Cpds St Petersburg 199004 Russia;

    Russian Acad Sci Inst Macromol Cpds St Petersburg 199004 Russia;

    Russian Acad Sci Inst Macromol Cpds St Petersburg 199004 Russia;

    Russian Acad Sci Inst Gen &

    Inorgan Chem Moscow 119991 Russia;

    Russian Acad Sci Inst Gen &

    Inorgan Chem Moscow 119991 Russia;

    Russian Acad Sci Inst Gen &

    Inorgan Chem Moscow 119991 Russia;

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  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类 有机化学;
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