TY - JOUR
T1 - Comparison between far-IR and IR absorption spectroscopy for estimating vinyl acetate content in ethylene-vinyl acetate copolymer
AU - Odaka, Daisuke
AU - Izutsu, Tomoyuki
AU - Komatsu, Marina
AU - Ohki, Yoshimichi
AU - Mizuno, Maya
PY - 2017
Y1 - 2017
N2 - Far-IR absorption spectra at frequencies from 0.5 to 21.0 THz were obtained for sheets of ethylene-vinyl acetate copolymer (EVA) containing different contents of vinyl acetate (VA) from 12 to 60% with different thicknesses from 1.0 to 3.0 mm. As a result, EVA exhibits absorption at 2.5, 6.7, 10.5, 11-17, and 17-20 THz. Especially, the 2.5-THz intensity with a good proportionality up to 60% of VA content exhibits comparable accuracy to the IR method and is applicable for estimating the VA content in EVA sheets 2.0 or 3.0 mm thick, for which IR method is difficult to be applied.
AB - Far-IR absorption spectra at frequencies from 0.5 to 21.0 THz were obtained for sheets of ethylene-vinyl acetate copolymer (EVA) containing different contents of vinyl acetate (VA) from 12 to 60% with different thicknesses from 1.0 to 3.0 mm. As a result, EVA exhibits absorption at 2.5, 6.7, 10.5, 11-17, and 17-20 THz. Especially, the 2.5-THz intensity with a good proportionality up to 60% of VA content exhibits comparable accuracy to the IR method and is applicable for estimating the VA content in EVA sheets 2.0 or 3.0 mm thick, for which IR method is difficult to be applied.
KW - Ethylene-vinyl acetate copolymer
KW - Far-IR spectroscopy
KW - IR spectroscopy
KW - Terahertz time domain spectroscopy
KW - Terahertz wave
KW - Vinyl acetate content
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U2 - 10.1541/ieejfms.137.171
DO - 10.1541/ieejfms.137.171
M3 - Article
AN - SCOPUS:85015756847
SN - 0385-4205
VL - 137
SP - 171
EP - 177
JO - IEEJ Transactions on Fundamentals and Materials
JF - IEEJ Transactions on Fundamentals and Materials
IS - 3
ER -