Study of the Structural Characteristics of Cellulose Nitrate by Wide Angle X-Ray Diffractometry
https://doi.org/10.56304/S2304487X21030081
Abstract
An approach to the computer solution of the problem of separating interference lines overlapping in a wide range of diffraction angles from an X-ray diffraction pattern of cellulose nitrate is presented. The results of calculations showed that the diffraction pattern of cellulose nitrate (CuKα radiation) in the range of angles 2θ = 19°–26° includes three strong interference lines of cellulose nitrate. Three broad interference lines of cellulose nitrate located in a narrow range of diffraction angles 2θ = 19°–26° overlap and create a “single peak.” An analysis of the calculated results has shown that the effective sizes of the regions of coherent scattering of cellulose nitrate along different crystallographic directions vary from 0.5 to 3.0 nm and are comparable with the sizes of building blocks of nanomaterials. The nanosize of the coherent scattering regions leads to a significant smearing of the interference lines. This blurring of cellulose nitrate interference lines is typical of nanomaterials. The blurring of the interference lines of cellulose nitrate and, as a consequence, the general view of the diffraction pattern of cellulose nitrate is due to the small size of the coherent scattering regions of the test substance. It is shown that the degree of crystallinity of the studied samples of nitrocellulose cannot be less than 30%. The calculated degrees of crystallinity are 82 and 83 % for the two studied samples of nitrocellulose.
About the Authors
V. F. Lomadurov
Federal Center for Dual-Use Technologies Soyuz
Russian Federation
Russian Federation
140090
Moscow oblast
Dzerzhinskiy
A. F. Voronkov
Federal Center for Dual-Use Technologies Soyuz
Russian Federation
Russian Federation
140090
Moscow oblast
Dzerzhinskiy
V. S. Smirnov
Institute of Problems of Chemical Physics, Russian Academy of Sciences
Russian Federation
Russian Federation
142432
Moscow oblast
Chernogolovka
Yu. B. Kalmykov
Institute of Problems of Chemical Physics, Russian Academy of Sciences
Russian Federation
Russian Federation
142432
Moscow oblast
Chernogolovka
T. V. Gubina
National Research Nuclear University MEPhI (Moscow Engineering Physics Institute)
Russian Federation
Russian Federation
115409
Moscow
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Review
For citations:
Lomadurov V.F., Voronkov A.F., Smirnov V.S., Kalmykov Yu.B., Gubina T.V. Study of the Structural Characteristics of Cellulose Nitrate by Wide Angle X-Ray Diffractometry. Vestnik natsional'nogo issledovatel'skogo yadernogo universiteta "MIFI". 2021;10(3):208-216. (In Russ.) https://doi.org/10.56304/S2304487X21030081
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