Aggregation of Polymer Microglobules on the Cross-Sectional Surfaces of Monolithic Quartz Capillary Columns

Electron microscopy and confocal laser microscopy are used to study the cluster structure of aggregates in polymer microglobules on the cross-sectional surfaces of monolithic columns containing a polyacrylate sorbent synthesized in situ within quartz capillaries (with outer and internal diameters am...

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Bibliographic Details
Published in:Surface investigation, x-ray, synchrotron and neutron techniques x-ray, synchrotron and neutron techniques, 2021-05, Vol.15 (3), p.430-435
Main Authors: Bubis, N. A., Mjakin, S. V., Shmykov, A. Yu
Format: Article
Language:English
Subjects:
Acrylic resins
Aggregates
Capillaries
Chemistry and Materials Science
Clusters
Coordination numbers
Cross-sections
Density
Diameters
Electron beams
Ethylene glycol
Glycol dimethacrylates
Laser microscopy
Materials Science
Microscopy
Polymers
Polymethyl methacrylate
Quartz
Short range order
Sorbents
Surfaces and Interfaces
Thin Films
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Summary:Electron microscopy and confocal laser microscopy are used to study the cluster structure of aggregates in polymer microglobules on the cross-sectional surfaces of monolithic columns containing a polyacrylate sorbent synthesized in situ within quartz capillaries (with outer and internal diameters amounting to 360 and 75 µm, respectively) via the electron-beam-initiated polymerization of a glycidilmethacrylate (GMA), methyl methacrylate (MMA) and ethylene glycol dimethacrylate (EGDMA) monomer mixture (at an energy of 700 keV, and an absorbed dose of 50 kGy). According to the approach of a lattice model, short-range order and the distribution of microglobules are studied and the lattice density fluctuations of particle aggregates on the surface of the column cross sections are calculated.It is established that on scales close to the correlation radius ξ microglobule aggregates are disordered, and the lattice density fluctuations of particle aggregates resulting from a nonuniform distribution of micropores lead to changes in the coordination number m (from m ≈ 3 to m ≈ 6), as well as to changes in the type of quasilattice. On scales exceeding the correlation radius ξ, an infinite cluster structure of particles on cross-sectional surfaces is formed due to the alternation of microglobular aggregates with a period close to ξ.
ISSN:1027-4510
1819-7094
DOI:10.1134/S1027451021030058