Novel rapid switching and bleaching electrochromic polyimides containing triarylamine with 2-phenyl-2-isopropyl groups
作者:Cheng-Hung Chang、Kun-Li Wang、Jyh-Chiang Jiang、Der-Jang Liaw、Kueir-Rarn Lee、Juin-Yih Lai、Kuan-Hua Lai
DOI:10.1016/j.polymer.2010.07.023
日期:2010.9
A series of novel organosoluble polyimides and copolyimides with a propeller-shaped triarylamine unit were prepared from diamine and various aromatic dianhydrides via direct polycondensation. All of the polymers possessed tough, flexible, and strong films with high molecular weights. The polyimide and copolyimide films revealed electrochromic characteristics, with a color change from pale yellowish at its neutral state, to green, and finally to blue at its oxidized state, at applied potentials ranging from 0 to 1.50 V. The polyimide (lb) film exhibited switching times of 4.5 s at 1.08 Vat 424 and 877 nm and 1.9 s for fast bleaching due to a pendent substituted 2-phenyl-2-isopropyl group. Cyclic voltammetry (CV) of the polymer films showed two reversible redox couples at potentials of 0.91-0.99 V and 1.30-1.38 V. respectively. The CV results of the model compound M1 and model polyimide M2, were not a match to the oxidation peaks of polyimide lb, indicating that the contribution of the oxidation was not only from the electron removal of nitrogen atoms. (C) 2010 Elsevier Ltd. All rights reserved.
THERMOPLASTIC RESINS STABILIZED BY BLENDS OF STERICALLY HINDERED PHENOLS,SECONDARY AMINES, AND LACTONES
申请人:UNIROYAL CHEMICAL COMPANY, Inc.
公开号:EP1325069B1
公开(公告)日:2006-02-22
Novel Polymer and Copolymer and Method of Making the Same
申请人:LIAW Der-Jang
公开号:US20110092657A1
公开(公告)日:2011-04-21
The present invention discloses a polymer and a copolymer and a method of making the same. The monomer of the polymer of the present invention includes a bi-triphenylamine functional group having a first end and a second end; a fluorene functional group bonded to the first end; and at least two phenyl isopropyl group bonded to the second end.