Spectroscopic Investigations of Poly(oxypropylene)glycol-Based Waterborne Polyurethane Doped with Lithium Perchlorate

Ten Chin Wen, Ming Sieng Wu, Chien Hsin Yang

研究成果: Article同行評審

76 引文 斯高帕斯(Scopus)

摘要

Polyaddition of isophorone diisocyanate to poly(oxypropylene)glycol (PPG)-Based waterborne Polyurethane (WPU) synthesized by a modified acetone process was performed. Fourier transform infrared spectroscopy (FTIR), X-ray photoelectron spectroscopy (XPS), differential scanning calorimetry (DSC), and impedance spectroscopy (IS) were utilized to monitor the phase change of this WPU with the doped lithium perchlorate (LiClO4) concentration. Significant changes occur in the FTIR spectrum of the WPU with the added salt concentration above 1 mmol/g WPU, indicating that an interaction with the lithium cation within the hard segment and between the hard and soft phases occurs. The soft segment Tg increases with increasing LiClO4 through the examination of DSC. XPS results reveal that the component of nitrogen polaron sites (N+) increases with increasing LiClO4 and that the saturation level of salt doping is evidenced by the mole ratio of component C-O to C=O; meanwhile, a rearrangement in the long chain of the soft domain has also been observed when this WPU is doped with LiClO4. IS results indicate an increase in bulk conductivity as the salt concentration is increased.

原文English
頁(從 - 到)2712-2720
頁數9
期刊Macromolecules
32
發行號8
DOIs
出版狀態Published - 1999 4月 20

All Science Journal Classification (ASJC) codes

  • 有機化學
  • 聚合物和塑料
  • 無機化學
  • 材料化學

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