Colorless triphenylamine-based aliphatic thermoset epoxy for multicolored and near-infrared electrochromic applications.
In this study, two novel colorless thermoset epoxy resins with anodically electrochromism were prepared from the thermal curing of two triphenylamine-based diamine monomers, 4,4'-diamino-4″-methoxytriphenylamine (1) and N,N'-bis(4-aminophenyl)-N,N'-di(4-methoxylphenyl)-1,4-phenylenediamine (2) with aliphatic epoxy triglycidyl isocyanurate, respectively. The resulting thermoset epoxy resins showed excellent softening temperature (Ts, 270 and 280 °C) due to the rigid structure and highly crosslinking density. In addition, novel colorless epoxy resin films revealed good reversible electrochemical oxidation and interesting multi-electrochromic behavior with high contrast ratio both in visible and near-infrared regions. The aliphatic thermoset epoxy resins also exhibited high transparency in visible region as colorless and great potential for practical electrochromic applications.
Functional Polymeric Materials Laboratory, Institute of Polymer Science and Engineering, National Taiwan University , 1 Roosevelt Road, 4th Sec., Taipei 10617, Taiwan.
Ya-Wen
YW
Chuang
Hung-Ju
HJ
Yen
Jia-Hao
JH
Wu
Guey-Sheng
GS
Liou