A photo-functional electro-optic polyimide with excellent high-temperature stability. (April 2019)

• Record Type: Journal Article
• Authors: Chung, Junyong; Seo, Haemin; Lim, Jongsun; Kim, Gyungock; Yi, Mi Hye; Ka, Jae-Won
• Is Part Of: Dyes and pigments. Volume 163(2019)
• Page Start: 547
• Page End: 552
• Publication Date: 2019-04
• Subjects: Photoreactive polyimide -- Electro-optic coefficient -- Thermal stability -- Chemical resistance -- Crosslinking; Dyes and dyeing -- Periodicals; Pigments -- Periodicals; 667.2
• DOI: 10.1016/j.dyepig.2018.12.049
• Languages: English
• ISSNs: 0143-7208

Abstract

Abstract: We herein report the preparation of a soluble polyimide from a photoreactive diamine and a phenolic diamine, to which electro-optic (EO) properties were imparted by the introduction of an EO chromophore (Disperse Red 1) into the phenolic group of the polyimide. Following poling at 1 MV/cm and 210 °C, the polyimide was irradiated with UV light (280–310 nm) to form a photo-crosslinking network. The EO coefficient of the polyimide-containing EO device was 27.7 p.m./V at 1.3 μm, and this value was maintained at ≥90%, even after annealing at 150 °C for 500 h. Our results indicated that the thermal and chemical stabilities of the EO polyamide were remarkably increased due to the photo-crosslinking reaction. Graphical abstract: Highlights: Developed highly thermal and chemical resistant EO polymer can be utilized to make optical devices via photolithography. After UV crosslinking, electro-optic coefficient value (r33 ) was maintained about 90% over 500 h at 150 °C.