由含雙吡啶環基聚亞醯胺製備二次非線性光學材料之研究

• Main Authors: Ming-Chun Chang, 張明群
• Other Authors: Ru-Jong Jeng
• Format: Others
• Language: zh-TW
• Published: 2002
• Online Access: http://ndltd.ncl.edu.tw/handle/50541716886043227686

碩士 === 國立中興大學 === 化學工程學系 === 90 === Polyimides containing bipyridyl units were synthesized. The bipyridyl units were successfully incorporated by polymerization of bipyridyl diamine and α,α’- bis(4-amino phenyl) 1,4-disiopropyl- benzene with hexafluoroisopropylidene 2,2’-bisphthalic anhydride. The polymers are thermally stable up to 400℃ and exhibit a high glass transition temperatures(254℃). Two nonlinear optical (NLO) systems based on the bipyridyl containing polyimides were developed. In an guest-host system, DR1 was doped into polyimide with various weight ratios. Because of hydrogen bonding between the guest (DR1) and host (polyimide), a doping level of 30wt% and a fast decay temperature (T0) of 70℃were obtained. For the other system, in situ sol-gel reaction of alkoxysilane dyes or alkoxysilane in polyimide matrices was utilized, resulting a series of NLO polyimide-inorganic materials with large second-order optical nonlinearity. In addition to comparable r33 values, T0 of this organic/inorganic system was much higher than that of the guest-host systems. Excellent long-term stability of the effective r33 at 100℃ was observed as well.