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  1. No Access

    Article

    Fabrication and properties of polyimide copolymer fibers containing pyrimidine and amide units

    Polyimide (PI) fibers containing pyrimidine and amide moieties were fabricated by the copolymerization of 2,5-bis(4-aminophenyl)pyrimidine (PRM) and 4,4′-diaminobenzanilide (DABA) with 3,3′,4,4′-biphenyltetrac...

    Feng Bao, Xuemin Dai, Zhixin Dong, **ao Yang, Haibo Yao… in Journal of Materials Science (2020)

  2. No Access

    Article

    Influence of solvent solubility parameter on the power law exponents and critical concentrations of one soluble polyimide in solution

    Solvent species influence the interactions of dissolved polymers in solution and consequently induce changes in solution properties. A soluble polyimide was synthesized through polycondensation, and four solve...

    Hongxiang Chen, Ensong Zhang, Xuemin Dai, Wenke Yang… in Journal of Polymer Research (2019)

  3. No Access

    Article

    Influence of molecular weight on scaling exponents and critical concentrations of one soluble 6FDA-TFDB polyimide in solution

    Polyimde (PI) samples with different molecular weights were synthesized. Based on SEC coupled with multidetectors measurement and Yamakawa-Fujii-Yoshizaki (YFY) model, eight soluble samples with absolute Mw from ...

    Ensong Zhang, Hongxiang Chen, Xuemin Dai, Xue Liu… in Journal of Polymer Research (2017)

  4. No Access

    Article

    Electrical Characterization of N+-implanted n-type ZnO Single Crystals: p-n Homojunction and Deep Level Defects

    Unintentionally doped n-type ZnO single crystals were implanted by nitrogen ions with different fluences of 1013, 1014 and 1015 cm−2 respectively. ZnO p-n homojunction was successfully fabricated due to the forma...

    Qilin Gu, Xuemin Dai, Chi-Chung Ling, Shijie Xu, Liwu Lu… in MRS Online Proceedings Library (2008)