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| Synthesis and properties of fluorinated semi–alicyclic transparent polyimide films for optocommunication applications |
| LIU Jingang†; LI Zhuo; GAO Zhiqi; YANG Haixia; YANG Shiyong |
| Laboratory of Advanced Polymer Materials; Institute of Chemistry; Chinese Academy of Sciences; Beijing 100080 |
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Cite this article:
LIU Jingang; LI Zhuo; GAO Zhiqi; YANG Haixia; YANG Shiyong. Synthesis and properties of fluorinated semi–alicyclic transparent polyimide films for optocommunication applications. Chin J Mater Res, 2008, 22(6): 615-618.
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Abstract Three alicyclic dianhydrides, 1,2,3,4–cyclobutanetetracarboxylic dianhydride (CBDA,I), 1,2,4,5–cyclopentanetetracarboxylic dianhydride (CPDA, II), and 1,2,4,5–cyclohexane tetracarboxylic dianhydride (CHDA, III) were polymerized with two aromatic diamines, 1,4–bis (4–amino–2– trifluoromethylphenoxy) benzene (6FAPB, a) and 4,4´–bis(4–amino–2– trifluoromethyl phenoxy) biphenyl (6FBAB, b) respectively, via a two–step polycondensation procedure to afford two series of fluorinated semi–alicyclic polyimides (PIs). The PIs showed good thermal stability with the initial thermal decomposing temperatures higher than 450 °C in nitrogen and glass transition temperatures higher than 250 °C. The PI films exhibited good optical transparency in the visible light region (450–700 nm) with the transmittance higher than 88% at 450 nm. The PI films showed little absorption at the optocommunication wavelengths of 1.30 μm and 1.55 μm.
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Received: 08 November 2007
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