TY - JOUR
T1 - A new method for estimating the content of vinyl acetate 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 - Funding Information:
This work was partly supported by a Grant-in-Aid from the Japan Society for the Promotion of Science (JSPS) for JSPS Fellows (25•2605).
Publisher Copyright:
© 2016 IEEE.
PY - 2016/6
Y1 - 2016/6
N2 - A new method for estimating the content of vinyl acetate (VA) in ethylene-vinyl acetate copolymer (EVA) is proposed. It is a kind of optical absorption spectroscopy in a frequency range from 0.5 to 21.0 THz. Comparison of absorption spectra among sheets of EVA with differing contents of VA from 12 to 60% by weight and a sheet of low-density polyethylene containing no VA revealed that the EVA sheets exhibit 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 intensities are in proportion to the content of VA, up to certain contents, which enables us to estimate the content of VA in EVA quantitatively. Among them, the absorption at 2.5 THz measured by THz time-domain spectroscopy shows the best accuracy.
AB - A new method for estimating the content of vinyl acetate (VA) in ethylene-vinyl acetate copolymer (EVA) is proposed. It is a kind of optical absorption spectroscopy in a frequency range from 0.5 to 21.0 THz. Comparison of absorption spectra among sheets of EVA with differing contents of VA from 12 to 60% by weight and a sheet of low-density polyethylene containing no VA revealed that the EVA sheets exhibit 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 intensities are in proportion to the content of VA, up to certain contents, which enables us to estimate the content of VA in EVA quantitatively. Among them, the absorption at 2.5 THz measured by THz time-domain spectroscopy shows the best accuracy.
KW - Dielectric materials
KW - ISO
KW - infrared spectroscopy
KW - optical spectroscopy
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U2 - 10.1109/TDEI.2015.005546
DO - 10.1109/TDEI.2015.005546
M3 - Article
AN - SCOPUS:84982129733
SN - 1070-9878
VL - 23
SP - 1260
EP - 1265
JO - IEEE Transactions on Dielectrics and Electrical Insulation
JF - IEEE Transactions on Dielectrics and Electrical Insulation
IS - 3
M1 - 7534602
ER -