TY - GEN
T1 - Terahertz and far-infrared spectroscopic estimation of vinyl acetate content in ethylene-vinyl acetate copolymer
AU - Izutsu, Tomoyuki
AU - Odaka, Daisuke
AU - Komatsu, Marina
AU - Ohki, Yoshimichi
AU - Mizuno, Maya
AU - Nakamura, Yoshiaki
AU - Chiwata, Naofumi
N1 - Publisher Copyright:
© 2015 IEEE.
PY - 2015/12/9
Y1 - 2015/12/9
N2 - For the purpose of estimating the content of vinyl acetate (VA) in ethylene-vinyl acetate copolymer (EVA), optical absorption spectra were measured in a frequency range from 0.5 to 21.0 THz for sheets of EVA containing different contents of VA from 12 to 60 % by weight and a sheet of low-density polyethylene containing no VA. As a result, it has become clear that EVA exhibits relatively sharp absorption at 2.5, 6.7, and 10.5 THz and rather broad absorption at 11 to 17 THz and 17 to 20 THz. All these absorption peaks and bands are in proportion to the content of VA, up to certain frequency-dependent contents. Using these proportionalities, the content of VA in EVA can be estimated quantitatively. Especially, the absorption at 2.5 THz shows a good accuracy similar to the method recommended by an international standard.
AB - For the purpose of estimating the content of vinyl acetate (VA) in ethylene-vinyl acetate copolymer (EVA), optical absorption spectra were measured in a frequency range from 0.5 to 21.0 THz for sheets of EVA containing different contents of VA from 12 to 60 % by weight and a sheet of low-density polyethylene containing no VA. As a result, it has become clear that EVA exhibits relatively sharp absorption at 2.5, 6.7, and 10.5 THz and rather broad absorption at 11 to 17 THz and 17 to 20 THz. All these absorption peaks and bands are in proportion to the content of VA, up to certain frequency-dependent contents. Using these proportionalities, the content of VA in EVA can be estimated quantitatively. Especially, the absorption at 2.5 THz shows a good accuracy similar to the method recommended by an international standard.
KW - ethylene-vinyl acetate copolymer
KW - far-infrared spectroscopy
KW - terahertz time domain spectroscopy
KW - terahertz wave
KW - vinyl acetate
UR - http://www.scopus.com/inward/record.url?scp=84959528000&partnerID=8YFLogxK
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U2 - 10.1109/CEIDP.2015.7351988
DO - 10.1109/CEIDP.2015.7351988
M3 - Conference contribution
AN - SCOPUS:84959528000
T3 - Annual Report - Conference on Electrical Insulation and Dielectric Phenomena, CEIDP
SP - 39
EP - 42
BT - 2015 IEEE Conference on Electrical Insulation and Dielectric Phenomena, CEIDP 2015
PB - Institute of Electrical and Electronics Engineers Inc.
T2 - IEEE Conference on Electrical Insulation and Dielectric Phenomena, CEIDP 2015
Y2 - 18 October 2015 through 21 October 2015
ER -