Fabrication and characterization of soluble,high thermal,and hydrophobic polyimides based on 4‐(3,5‐dimethoxyphenyl)‐2,6‐bis(4‐aminophenyl)pyridine |
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| Authors: | Xiaohua Huang Beicai Chen Chanjuan Liu Huanfu Zhou Chun Wei |
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| Affiliation: | Key Laboratory of New Processing Technology for Nonferrous Metal & Materials, Ministry of Education, Collaborative Innovation Center for Exploration of Hidden Nonferrous Metal Deposits and Development of New Materials in Guangxi, School of Materials Science and Engineering, Guilin University of Technology, Guilin 541004, China |
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| Abstract: | A novel aromatic diamine monomer, 4‐(3,5‐dimethoxyphenyl)‐2,6‐bis(4‐aminophenyl)pyridine (DPAP) was successfully synthesized by 4′‐nitroacetophenone and 3,5‐dimethoxybenzaldehyde as raw material. The structure of DPAP was confirmed by Fourier transform infrared, nuclear magnetic resonance, and mass analysis. A series of polyimides (PIs) were obtained by polycondensation with various dianhydrides via the conventional two‐step method. These PIs showed good solubility in organic solvents. They also presented high thermal stability, the glass transition temperatures (Tg) of polymers were in the range of 325–388 °C, and the temperature at 10% weight loss was in the range of 531–572 °C. Furthermore, these polymers also exhibited outstanding hydrophobicity with the contact angles in the range of 89.1°–93.5°. Moreover, the results of wide‐angle X‐ray diffraction (WAXD) confirmed these polymers showed amorphous structure. © 2017 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2018 , 135, 45827. |
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| Keywords: | films polycondensation polyimides thermal properties |
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