ポリテトラメチレンオキシド／三酸化タングステンハイブリッドのフォトクロミック特性と微細構造

伊掛 浩輝, 橋本 和可子, 小原 多美子, 栗田 公夫, 矢野 彰一郎

doi:10.1295/koron.57.376

書誌事項

タイトル別名

Photochromic Properties and Microstructures of Poly (tetramethylene oxide)/Tungsten Trioxide Hybrid Materials.

公開日: 2000

DOI

10.1295/koron.57.376

公開者: 公益社団法人高分子学会

説明

Tungsten trioxide (WO₃) was incorporated in silica end-capped poly (tetramethylene oxide) (PTMO) using the sol-gel process involving ion exchange of sodium tungstate dihydrate. When the hybrid was irradiated with a low-pressure mercury lamp, the transmittance at 620 nm in the UV-visible spectra decreased and the color changed from pale yellow to blue. This means that amorphous WO₃ have changed to the tungsten bronze structure. After irradiation the films bleached with elapsed time in the dark. Temperature dependence of the dynamic viscoelasticity of the PTMO/WO₃ hybrid was measured. A sharp peak at about -55°C in the tan 5 curves is due to microBrownian motion of PTMO segments. The peak position did not change below 15wt% of WO₃ content, but above 30wt% it shifted to a higher temperature and the peak broadened. The storage modulus of the hybrids at the rubbery region increased with increasing amount of WO₃. A broad peak in small-angle X-ray scattering profiles was caused by the interference between terminated silica domains. The peak position shifted to a lower angle, and the peak disappeared with increasing amount of WO₃. These results suggest that the WO₃ domains may be formed in the vicinity of silica domains below 15% of WO₃ content, but dispersed in the PTMO matrix above 30% WO₃and strongly restricts the molecular motion of the PTMO segments.

収録刊行物

高分子論文集

高分子論文集 57 (6), 376-382, 2000

公益社団法人高分子学会

キーワード

詳細情報詳細情報について

CRID: 1390282681498423552

NII論文ID: 130003837690

DOI: 10.1295/koron.57.376

ISSN: 18815685; 03862186

本文言語コード: ja

データソース種別

JaLC
Crossref
CiNii Articles

抄録ライセンスフラグ: 使用不可

書き出し

問題の指摘