Mechanical properties of magnetically oriented epoxy

Abstract

ABSTRACT:The microstructure of an epoxy system oriented in high magnetic fields (15-25 T) has been observed to consist of highly oriented domains at the molecular level along the direction of the applied field. The changes in the microstructure have been characterized as a function of the magnetic-field strength and have been investigated microscopically and with wide-angle X-ray diffraction. The mechanical properties of the epoxy have been examined in light of nanoindentation experiments at different load levels. The basic results of the experimental investigations for the effect of high magnetic fields on the structure and property of the epoxy are presented. Nanoindentation testing has revealed large differences in the nanomechanical behavior for thermomagnetically processed epoxy specimens. The differences can be ascribed to the microstructural changes (reorientation) of the polymer at the molecular level.

Bioinspired Nanocomposite Hydrogels with Highly Ordered Structures

“…[55][56][57][58] Among these studies, well-ordered polymer/carbon nanotube (CNT) nanocomposites have attracted considerable attention due to their excellent mechanical and electronic properties. [55,59] In the hydrogel field, an anisotropic, fluorescent, thermoresponsive hydrogel material that was based on magnetically oriented Eu(III)-multiwalled CNTs (MWCNTs) was reported by Maggini et al [57] In their work, they fabricated oriented Eu(III)-MWCNT frameworks by utilizing their intrinsic anisotropic magnetic susceptibilities and then further controlled the alignment of the CNT frameworks via a magnetic field (Figure 2b). Such an oriented nanocomposite structure exhibits anisotropic emission properties in the final hybrid hydrogel material.…”

Vibration and instability of a single-walled carbon nanotube in a three-dimensional magnetic field

“…By introducing Eq. (16) to Eq. (15), the dimensionless equations of motion of a SWCNT due to an arbitrary magnetic field based on the NRBT are procured as:…”

“…To this end, suitable mathematical models for factual understanding their vibration characteristics are required. This could be considered as a pivotal stage in optimal design of CNTs as well as their usage in a diverse range of applications such as nanosensors [11][12][13], nanooscillators [14,15], and magnetically aligned nanotubes in composites [16][17][18].…”

Nanocharacterization of Proton Radiation Damage on Magnetically Oriented Epoxy

“…Reported improvements included mechanical properties (Young's modulus, universal hardness) and physical properties (thermal and electrical conductivities). [21][22][23] The purpose of the current work is to investigate both the shielding effectiveness and the mechanical-property degradation of a structural epoxy exposed to intense proton beams and also to explore the effect of magnetic processing on the mechanical properties and shielding effectiveness.…”