Synthesis and Characterization of New Polyimides and Polyamides with Anthraquinone Pendent Groups

• Main Authors: Wei-lun Hsu, 徐偉倫
• Other Authors: Yaw-Terng Chern
• Format: Others
• Language: zh-TW
• Published: 2008
• Online Access: http://ndltd.ncl.edu.tw/handle/73857633563029030215

碩士 === 國立臺灣科技大學 === 化學工程系 === 96 === A series of polyimides containing pendent anthraquinone groups were synthesized. The poly(amic-acid)s had inherent viscosities of 0.56~1.05 dL/g. The soluble polyimide had inherent viscosities of 0.82 dL/g. The polyimide were soluble in m-cresol、o-chlorophenol. The polymer films had tensile strengths of 46~152MPa, and elongation to break of 4.5~11.3%. The dynamic mechanical analysis (DMA) reveals that the glass transition temperatures ranged on 303∼401℃. In addition, the temperatures of 10% weight loss in air and nitrogen ranged on 543~574℃ and 551~574℃, respectively. In the UV/Visible spectra, those polyimides had strong absorption bands from 316~321 nm in solution state. The energy band gaps of polymers calculated from the onset absorption wavelength of UV spectra in solution state were in the range from 3.0~3.05 eV. The photoluminescence spectra showed maximum bands ranged on 596~647nm in the red region. In addition, cyclic voltammetry (CV) was employed to investigate the electrochemical behaviors of polyimides. The results showed that reversible oxidation redox couples at E1/2 ranged on 1.25~1.4 V. The HOMO and LOMO energy levels of the polyimides ranged on 5.61~5.76eV and 2.56~2.74eV, respectively. A series of polyamides containing pendent anthraquinone groups were synthesized. The polyamides had inherent viscosities of 0.42 and 1.02 dL/g, respectively. The polyamide were soluble in N-Methyl-2-pyrrolidone (NMP) , N,N'-Dimethylacetamide (DMAc)、m-cresol、o-chlorophenol. The polymer films had tensile strengths of 49 and 62MPa, respectively and elongation to break of 3 and 5%, respectively. The dynamic mechanical analysis (DMA) reveals that the glass transition temperatures were 266 and 288℃, respectively. In addition, the temperatures of 10% weight loss in air and nitrogen were 494、534℃ and 496、512℃, respectively. In the UV/Visible spectra, those polyamides had strong absorption bands at 317 and 310 nm in solution state, respectively. The energy band gaps of polymers calculated from the onset absorption wavelength of UV spectra in solution state were 2.92 and 2.93 eV, respectively. The photoluminescence spectra showed maximum bands were 622 and 612 nm in the red region, respectively. In addition, cyclic voltammetry (CV) was employed to investigate the electrochemical behaviors of polyamides. The results showed that reversible oxidation redox couples at E1/2 were 0.96 and 0.99 V, respectively. The HOMO energy levels of the polyamides were -5.32、-5.35eV, respectively. The LOMO energy levels of the polyamides were -2.4 and -2.42eV, respectively.