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Peculiarities of the initial stages of carbonization processes in polyimide-based nanocomposite films containing carbon nanoparticles
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SYSNO ASEP 0507451 Document Type J - Journal Article R&D Document Type Journal Article Subsidiary J Článek ve WOS Title Peculiarities of the initial stages of carbonization processes in polyimide-based nanocomposite films containing carbon nanoparticles Author(s) Gofman, I. V. (RU)
Balík, Karel (USMH-B) RID, ORCID
Černý, Martin (USMH-B) RID, ORCID, SAI
Žaloudková, Margit (USMH-B) RID
Goikhman, M. Y. (RU)
Yudin, V. E. (RU)Article number 1076712 Source Title Cogent chemistry - ISSN 2331-2009
Roč. 1, č. 1 (2015)Number of pages 16 s. Publication form Print - P Language eng - English Country NO - Norway Keywords carbonization ; polyimides ; nanocomposite films ; carbon nanocones/disks ; vapor grown carbon fibers Subject RIV JI - Composite Materials OECD category Composites (including laminates, reinforced plastics, cermets, combined natural and synthetic fibre fabrics Method of publishing Open access Institutional support USMH-B - RVO:67985891 UT WOS 000422314500033 DOI 10.1080/23312009.2015.1076712 Annotation Carbonization of the polyimide-based composite films containing carbon nanoparticles, namely nanofibers and nanocones/disks, in the temperature range 500-550 degrees C was studied and the kinetics of the initial stage of carbonization and the effect of the filler on the mechanical properties of the carbonized films were evaluated. Two polyimides (PIs) characterized by different macrochains' rigidity and different degrees of ordering of the intermolecular structure were used. The character of the nanofiller's action on the kinetics of the carbonization process depends on the heating rate. In this work, the intensity of the destruction of the PI matrix of the composite films was shown to be slightly higher than that of films of the same polymers with no filler. The introduction of the carbon nanoparticles into both PIs provokes the increase in the ultimate deformation values of the partially carbonized films, while the carbonization of the unfilled PI films yields the brittle materials. The Young's modulus values of the materials based on the rigid-rod PI do not increase after carbonization, while those for compositions based on the PI with semi-rigid chains increase substantially. Carbon nanocones/disks are characterized by the best compatibility with matrix PIs in comparison with carbon nanofibers. Workplace Institute of Rock Structure and Mechanics Contact Iva Švihálková, svihalkova@irsm.cas.cz, Tel.: 266 009 216 Year of Publishing 2020 Electronic address https://www.cogentoa.com/article/10.1080/23312009.2015.1076712.pdf
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