Fluorinated Hyperbranched Polyimide for Optical Waveguides

✍ Scribed by Hong Gao; Dong Wang; Shaowei Guan; Wei Jiang; Zhenhua Jiang; Weinan Gao; Daming Zhang

• Book ID: 102494421
• Publisher: John Wiley and Sons
• Year: 2007
• Tongue: English
• Weight: 246 KB
• Volume: 28
• Category: Article
• ISSN: 1022-1336
• DOI: 10.1002/marc.200600670

✦ Synopsis

Abstract

A novel fluorinated hyperbranched polyimide (HBPI) is synthesized by using a new triamine monomer, 1,3,5‐tris(2‐trifluoromethyl‐4‐aminophenoxy)benzene (TFAPOB) (A~3~), as a ‘core’ molecule, 4,4‐(hexafluoroisopropylidene)diphthalic anhydride (6FDA) as a B~2~ monomer, and 3,5‐ditrifuoromethylphenyl as an endcapping reagent. The polymer shows a glass transition temperature of 232 °C and a temperature of 10% weight loss at 535 °C. The HBPI presents a birefringence as low as 0.002 at 650 nm. Near‐IR results indicate that HBPI exhibits desirable properties for low loss optical waveguide applications.

magnified image