Abstract

Terahertz (THz) absorption spectra of cross-linked polyurethane films were observed at 30–180 °C. The obtained spectra displayed characteristic absorption bands. A band observed at 2.6 THz was assigned to the C=O···N-H hydrogen bond vibration using previously reported data. DFT calculation results confirmed that a band at 7.5 THz arises owing to the torsional vibration of cross-linked molecules containing urethane bonds. The slight changes in the temperature-dependent spectra were analyzed by the first derivative of absorption intensity with temperature. The thermal behavior of absorption intensities indicates the dynamics of hydrogen bonds and cross-linked structures in polyurethane films.

Details

Title
Terahertz Spectroscopy for Characterization of Hydrogen Bonding and Cross-linked Structure Dynamics in Polyurethane
Author
Hoshina Hiromichi 1   VIAFID ORCID Logo  ; Saito Yuichi 1 ; Furuhashi Takumi 2 ; Shimazaki Tomomi 2 ; Sawada Manabu 2 ; Hioki Yasunori 2 ; Otani Chiko 3 

1  RIKEN Center for Advanced Photonics, Sendai, Japan 
2  Murata Manufacturing Co., Ltd., Nagaokakyo, Japan (GRID:grid.471199.3) (ISNI:0000 0004 0396 5211) 
3  RIKEN Center for Advanced Photonics, Sendai, Japan (GRID:grid.471199.3) 
Pages
265-275
Publication year
2020
Publication date
Mar 2020
Publisher
Springer Nature B.V.
ISSN
18666892
e-ISSN
18666906
Source type
Scholarly Journal
Language of publication
English
DOI
https://doi.org/10.1007/s10762-019-00667-0
ProQuest document ID
2355482652
Copyright
Journal of Infrared, Millimeter, and Terahertz Waves is a copyright of Springer, (2020). All Rights Reserved. This work is published under https://creativecommons.org/licenses/by/4.0/ (the “License”). Notwithstanding the ProQuest Terms and Conditions, you may use this content in accordance with the terms of the License.