Open AccessProcessing of polymers in high magnetic fields
Author(s) -
Elliot P. Douglas,
Mark E. Smith,
Brian C. Benicewicz,
Jim D. Earls,
Ralph D. Priester
Publication year - 1996
Publication title -
osti oai (u.s. department of energy office of scientific and technical information)
Language(s) - English
Resource type - Reports
DOI - 10.2172/238488
Subject(s) - thermosetting polymer , diamagnetism , diglycidyl ether , polymer , crystallinity , materials science , magnetic field , magnet , paramagnetism , composite material , liquid crystal , molecule , chemical physics , epoxy , condensed matter physics , chemistry , organic chemistry , mechanical engineering , optoelectronics , physics , bisphenol a , quantum mechanics , engineering
Many organic molecules and polymers have an anisotropic diamagnetic susceptibility, and thus can be aligned in high magnetic fields. The presence of liquid crystallinity allows cooperative motions of the individual molecules, and thus the magnetic energy becomes greater than the thermal energy at experimentally obtainable field strengths. This work has determined the effect of magnetic field alignment on the thermal expansion and mechanical properties of liquid crystalline thermosets in the laboratory. Further advances in magnet design are needed to make magnetic field alignment a commercially viable approach to polymer processing. The liquid crystal thermoset chosen for this study is the diglycidyl ether of dihydroxy-{alpha}-methylstilbene cured with the diamine sulfamilamide. This thermoset has been cured at field strengths up to 18 Tesla
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