NDLI: In-situ WAXS study of the crystal structure of R-BAPB oligoimide during heating

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In-situ WAXS study of the crystal structure of R-BAPB oligoimide during heating

Content Provider	Scilit
Author	Ivan’Kova, E. M. Kasatkin, I. A. Popova, E. H. Didenko, A. L. Vaganov, G. V. Yudin, V. E. Komarov, P. V.
Copyright Year	2020
Description	Journal: Journal of Physics: Conference Series In the process of this work, an oligoimide FT-BAPB-R-BAPB-FT was synthesized, the particles of which consist of numerous lamellas having a semi-crystalline structure. On the DSC thermogram of oligoimide powder, two endo peaks were observed at 281.1°C and 306.4°C. A unique WAXS experiment was performed in-situ by heating the reactor oligoimid powder in a heat chamber. There was no significant difference in the X-ray profiles when the sample was heated. It should be noted that the transformation of the crystalline cell does not occur until the sample melts. It was revealed that the degree of crystallinity decreases during heating. We believe that the low-temperature endopeak is associated with the melting of small crystallites and amorphization of the sample. However, a significant increase in crystal size was found to be a result of recrystallization. Thus, the high-temperature endopic corresponds to the melting of larger crystallites.
Related Links	https://iopscience.iop.org/article/10.1088/1742-6596/1697/1/012115/pdf
ISSN	17426588
e-ISSN	17426596
DOI	10.1088/1742-6596/1697/1/012115
Journal	Journal of Physics: Conference Series
Issue Number	1
Volume Number	1697
Language	English
Publisher	IOP Publishing
Publisher Date	2020-12-01
Access Restriction	Open
Subject Keyword	Journal: Journal of Physics: Conference Series
Content Type	Text
Resource Type	Article
Subject	Physics and Astronomy

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