Effect of isothermal annealing on the crystallinity degree of polyetherketoneketone containing discrete carbon fibers

Losev A.V., Gulyaev A.I., Juravleva P.L., Antyufeeva N.V.
UDC
539.2:678.6
DOI
10.18577/2307-6046-2026-0-2-58-72
Article PDF (Russian) (1.45 MB)
How to cite
Losev A.V., Gulyaev A.I., Juravleva P.L., Antyufeeva N.V. Effect of isothermal annealing on the crystallinity degree of polyetherketoneketone containing discrete carbon fibers // Proceedings of VIAM. 2026. No. 2. DOI: 10.18577/2307-6046-2026-0-2-58-72. URL: https://test.viam.ru/en/journal/2026/2/6
Keywords
polyetherketoneketone, additive manufacturing, semicrystalline thermoplastic, X-ray diffraction analysis, microstructure, annealing
Abstract

This study demonstrates the effect of annealing temperature on crystallite size, lattice parameters, and the degree of crystallinity of polyetherketoneketone (PEKK), containing carbon fibers. The particle sizes of the PEKK and carbon fibers were determined using optical and electron microscopy. Temperature dependences of the thermoplastic's degree of crystallinity, calculated using X-ray diffraction analysis, were plotted. The mechanism of isothermal crystallization of PEKK was studied, and the effect of polymer crystallinity on fracture microstructure was demonstrated.

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