Synthesis and characterization of transparent polyimides derived from ester-containing dianhydrides with different electron affinities

分类： 物理学 >> 普通物理:统计和量子力学,量子信息等 提交时间： 2017-05-02

Zhou, Y [Zhou, Yu][ 1,2 ] Chen, GF [Chen, Guofei][ 1 ] Wang, W [Wang, Wei][ 1 ] Wei, LH [Wei, Lihong][ 1 ] Zhang, QJ [Zhang, Qiuju][ 1 ] Song, LP [Song, Liping][ 2 ] Fang, XZ [Fang, Xingzhong][ 1 ]

摘要： Two series of poly(ester imide)s derived from bis(trimellitic acid anhydride) phenyl ester (TAHQ) and bis[(3,4- dicarboxylic anhydride) phenyl] terephthalate (PAHP), as well as poly(ether imide)s based on hydroquinone diphthalic anhydride (HQDPA), were synthesized with aromatic diamines via solution polycondensation. These polyimide films were transparent with an ultraviolet-visible absorption cut-off wavelength below 375 nm, and with tensile strengths of 42.0–83.8 MPa, tensile moduli of 2.5–4.7 GPa and elongations at break of 2.1–5.4%. Compared with the poly(ether imide)s, the poly(ester imide)s showed higher glass transition temperatures (Tg), lower water absorption (WA) and lower temperature of 5% weight loss (Td5%). Moreover, the poly(ester imide)s derived from PAHP with a low electron affinity of 2.04 eV by theoretical calculation achieved better transparency, lower WA and slightly lower Tg than the corresponding TAHQ- based poly(ester imide)s.

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