Synthesis and properties of transparent polyimides derived from 1,4-cyclohexylene bis(trimellitate anhydride)
writer：Guofei Chen,* Yu Zhou, Kai Ma, Wei Wang, Xingzhong Fang
keywords：Transparent, polyimides, bis(ester anhydride), cyclohexane
source：期刊
specific source：High Perform. Polym.
Issue time：2017年
A series of polyimides (PIs) derived from 1,4-cyclohexylene bis(trimellitate anhydride) (TACH) was synthesized by conventional two-step method with chemical imidization. The resulting PIs had glass transition temperatures (Tgs) in the range of 188–240C and exhibited good mechanical properties with tensile strengths of 50.0–90.2 MPa, tensile moduli of 2.2–3.9 GPa, and elongations at break of 2.9–5.8%. These PI films showed high optical transparency with cut-off wavelengths of 345–369 nm and high transmittance at 500 nm with more than 84%. Compared with PIs derived from 1,4-bis(3,4-dicarboxyphenoxy)cyclohexane dianhydride, the TACH-based PIs showed higher Tg, better solubility, and competitive transparency.