Nanocrystals of Montmorillonite in Composites of Ultrahigh-Molecular Weight Polyethylene

Abstract

The results of the X-ray diffraction analysis of ultrahigh-molecular weight polyethylene with montmorillonite crystals have shown the Debye lines to be wide and low-resolved for all the diffraction angles. During the investigation of Fe 3þ EPR spectum for montmorillonite single crystals, the effect of crystalline -field multiminimum potential has been revealed in the temperature range from 77 to 300 K. It has been also revealed that the position of Fe 3þ -ion in the electric field is not central. The results of the EPR and X-ray diffraction analysis done on montmorillonite and kaolinite nanocrystalls have shown that the spectra are wellresolved and can be used in future studies of the texture in nanocomposites of ultrahigh -molecular weight polyethylene with kaolinite and montmorillonite crystals.

Dynamic Characteristic of Molecular Structure of Poly(ortho-methoxyaniline) with Magnetic Probes

“…The similar behavior is displayed with manifestation of Jahn–Teller effect ,− for Cu 2+ ions. The observable temperature transformation of ESR spectrum with iron − is explained by the existence of peculiarities (multiminimum character) of molecular electric field (Figure ) potential surface shape in PoMA structure due to structurally nonequivalent positions of iron ions (Figure ).…”

“…We have conducted research in ion interaction with the immediate molecular environment in compounds of different structure symmetry. − These articles are studying the spectra of electron spin resonance (ESR) in a number of model compounds with magnetic centers. The temperature transformation of the ESR spectra experiments have revealed a new effect in the temperature dependence of the electronic states of the complexes with magnetic probes.…”