Composite materials made of ultrahigh-molecular-weight polyethylene (UHMWPE) and boron have been synthesized using polymerization filling (polymerization in situ), varying the boron content in a wide...

The possibility of creating vacuum robotics based on the polymer structures irradiated by an electron beam, in particular, polymer fibers, which provide high functional flexibility and a variety of states, is discussed. The possibility of using polymer fibers as different types of MEMS-like electromechanical elements is demonstrated - from elastic cantilevers to springs that change their state under the electron beam. Experimentally proved the presence of different functional types of fibers, correlating with their thickness, as well as the phenomenon of the fiber break. A number of exotic forms of dynamics have been demonstrated and a method for their detection has been developed using 2D Fourier spectra, integral spatial characteristics, time rsolved correlograms and wavelet transforms (visualized as the scaleograms / scalograms). Access barcodes for the full video records of the corresponding experiments are provided.

The problem of interaction of microelectromechanical systems and structures with electron and ion beams applied for the tasks of cryovacuum and space electronics and control of space telescopes is posed in the introduction, and the need for modeling the above effects in ground experiments is demonstrated. A technique for modeling the effect of charged particle beams on the polymer ferroelectric and piezoelectric structures, such as the interacting polymer fibers / «fuzzy neuromorphic connectomes» is proposed and implemented based on time-resolved electron microscopy tools with real-time data analysis, up to stroboscopic electron microscopy. In particular, a 2D Fourier transform and subsequent calculation of integral spatial characteristics (ISCs), analysis of the interframe correlations, complex wavelets are used. The experiments demonstrate piezoelectric fiber dynamics of microelectromechanical systems, detected by the change in 2D Fourier spectra of the fiber structures over time under the electron beam. The dynamics of fiber structures and networks with their topology changing under the electron beam is also shown. Time-lapse recording data prove that in some cases such structures can operate as drive (control) electromechanical elements, elastic elements (springs), contactors or locking (blocking) elements. The mechanical fracture of microfibers is also demonstrated. The possibility of coupling several fibers of different thickness and electrophysical properties to achieve complex control over microelectromechanical structures and systems based on them is also shown. The discussion points out the prospects of studying the above structures and systems both within the framework of polymer microelectromechanics or mechatronics, and for creating neuromimetic network structures for sensorics and adaptive motorics, actuated by the charged particle beams (electrons, ions, etc.) and inducing the fiber MEMS dynamics of the «artificial muscle» type, operating based on the principles of teinochemistry and chemomechanics of polymers with field-controlled adaptive «fuzzy» connection formation.

Маклакова И.А., Крашенинников В.Г., Кудинова О.И., Шашкин Д.П., Новокшонова Л.А.//2021

Composites based on UHMWPE and amorphous boron with a boron content from 20 to 73 wt % (10–52 vol %) were synthesized by polymerization filling method. The effectiveness of radiation protection against fast and thermal neutrons and the mechanical properties of materials depending on the degree of filling are investigated. According to the results of the study, the obtained highly filled composites combine high characteristics of neutron protection with high compressive strength and the ability to plastic deformation.