Abstract
A new aromatic diamine, 4-(4-trifluoromethylphenyl)-2,6-bis[4-(4-amino-2-trifluoromethylphenoxy)phenyl]pyridine (9FPBAPP), was prepared from 4-(4-trifluoromethylphenyl)-2,6-bis(4-hydroxyphenyl)pyridine with 2-chloro-5-nitrotrifluoromethylbenzene by substitution and reduction reactions successively. A series of fluorinated copoly(pyridine ether imide)s were prepared from 4,4′-oxydianiline (ODA), pyromellitic dianhydride and 9FPBAPP by thermal imidization procedure with various mole ratios of ODA and 9FPBAPP. All polymers were amorphous and soluble in organic solvents such as N,N-dimethylacetamide and N-methyl-2-pyrrolidone, and had Tgs of 285.8–310.0 °C, 5% weight loss temperature of 545.5–565.7 °C in nitrogen atmosphere. Tough and flexible polymer films also exhibited excellent mechanical properties with tensile strengths of 76.3–96.5 MPa, tensile moduli of 1.3–1.8 GPa, elongations at break of 15.6–25.1%, low dielectric constants of 3.04–3.51 (1 MHz) and water uptake of 0.44–0.65%, as well as high optical transparency with an ultraviolet–visible absorption cutoff wavelength in the 382–412 nm range.
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Acknowledgements
The financial support for this research provided by the National Natural Science Foundation of China (Nos. 21464007, 21564005, 51763012), the Training Program for Science and Technology Leaders in Major Subjects of Jiangxi Province of China (No. 20113BCB22012), the Ground Project for Science and Technology of Jiangxi Universities (No. KJLD14022) and the Research Program of Jiangxi Province Department of Education (No. GJJ14236) is gratefully acknowledged.
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Zhou, YT., Liu, XL., Wei, MH. et al. New fluorinated copoly(pyridine ether imide)s derived from 4,4′-oxydianiline, pyromellitic dianhydride and 4-(4-trifluoromethylphenyl)-2,6-bis[4-(4-amino-2-trifluoromethylphenoxy)phenyl]pyridine. Polym. Bull. 76, 4139–4155 (2019). https://doi.org/10.1007/s00289-018-2585-6
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DOI: https://doi.org/10.1007/s00289-018-2585-6