| Summary: | 碩士 === 國立臺北科技大學 === 化學工程研究所 === 97 === A terta-amine monomer with two kinds of amino groups, 2,4-diamine-6-(N,N-bis(4-aminophenyl)-4-pheylamine)-1,3,5-triazine, containing triphenylamine electro-donor and 1,3,5-triazine electro-acceptor groups was synthesized and used in the preparation of polyimides. The two kinds of amino groups in the monomer were confirmed from the 1H-NMR spectrum. The protons of amino groups attached to triphenylamine group are at 5.0 ppm and the protons of amino groups attached to triazine group are at 6.6 ppm, which indicates the former amino groups are more reactive than the latter ones.
The structures of polymers were confirmed by FT-IR and NMR. The poly(amic acid)s were soluble in the polar aprotic solvents, such as DMF, DMSO, DMAc and NMP. The poly(amic acid)s and polyimides had inherent viscosity of 0.21~0.32 and 0.32~0.64 dLg-1 in DMAc solution. The low viscosity of the poly(amic acid)s maybe result from their branched structures. The optical properties were analyzed by UV-Vis and photoluminescence (PL) spectroscopy. The polymers exhibited UV-Vis absorption bands around 250~400 nm in DMSO solution. Their photoluminescence spectra showed emission peaks around 400~550 nm in DMSO solution. The polyimides which were carried by themal method were fairly stable up to a temperature above 350 oC and 10 % weight temperature higher than 407 oC.
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