Summary
Two new bisphenol monomers containing naphthylene groups were synthesized by a Friedel-Crafts acylation reaction followed by a demethylation reaction. Four naphthylated poly(aryl ether ketone)s (PANEKs) were successfully prepared via a typical nucleophilic substitution polycondensation. These PANEKs exhibited excellent properties including high Tgs (above 204oC) and good thermal stability (the temperature at 5% weight loss in air was above 430oC). They had improved solubility, and flexible and transparent membranes could be cast from their solutions. The good mechanical property (tensile strength of 82.2∼102.8 MPa, Young’s moduli of 2.1∼2.4 GPa, and elongation at break of 17∼31%) indicated they were strong materials. Low dielectric constant (2.8-2.9 at 1 MHz) and moisture absorptions (i<<0.45%) were also detected from the polymer films.
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Zhang, Y., Liu, B., Zhang, Y. et al. Novel high performance poly(aryl ether ketone)s based on symmetrical naphthylene isomers. Polym. Bull. 61, 699–704 (2008). https://doi.org/10.1007/s00289-008-0996-5
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DOI: https://doi.org/10.1007/s00289-008-0996-5