The nature of the change in creep under the cyclic loading on composites based on polyimide (PI) and polyetherimide (PEI) loaded with short carbon fibers (CFs) has been established. It is shown that in the low-cycle fatigue (LCF) mode, the durability of PI composites is several times higher, and the growth rate of cyclic creep is several times lower than for identically filled PEI-based composites. The higher growth rate of cyclic creep for the CF-loaded PEI is explained by the greater flexibility of the polymer macromolecule and, as a result, the ability to rearrange the microstructure.
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Panin, S.V., Bogdanov, A.A., Eremin, A.V. et al. Creep Behavior of Particulate Polyimide and Polyetherimide Based Composites Under Fatigue. Russ Phys J 66, 372–377 (2023). https://doi.org/10.1007/s11182-023-02949-6
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DOI: https://doi.org/10.1007/s11182-023-02949-6