Synthesis and properties of novel poly(aryl ether ketone)s containing both 2,6‐naphthylene moieties and amide linkages in the main chains |
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Authors: | Mingzhong Cai Mengfei Chen Yikai Yu Caisheng Song |
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Institution: | Department of Chemistry, Jiangxi Normal University, , Nanchang, 330022 P. R. China |
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Abstract: | A new monomer, 2,6‐bis(4‐phenoxybenzoyl)naphthalene (BPOBON), was easily synthesized via simple synthetic procedures from readily available materials. A series of novel poly(aryl ether ketone)s containing both 2,6‐naphthylene moieties and amide linkages in the main chains were prepared by the Friedel‐Crafts acylation solution copolycondensation of isophthaloyl chloride with a mixture of BPOBON and N,N'‐bis(4‐phenoxybenzoyl)‐1,4‐phenylenediamine (BPBPPD), over a wide range of BPOBON/BPBPPD molar ratios, in the presence of anhydrous AlCl3 and N‐methylpyrrolidone in 1,2‐dichloroethane. All the polymers are semicrystalline and had remarkably increased Tgs over the conventional PEEK and PEKK due to the incorporation of naphthalene and amide linkages in the main chains. The polymers with 50–70 mol% BPOBON had not only high Tgs of 179–186 °C, but also moderate Tms of 321–328 °C, which are very suitable for the melt processing. These polymers had tensile strengths of 101.5–107.1 MPa, Young's moduli of 2.13–2.39 GPa, and elongations at break of 11.8–13.7% and exhibited excellent thermal stability and good resistance to organic solvents. Copyright © 2013 John Wiley & Sons, Ltd. |
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Keywords: | poly(aryl ether ketone) Friedel‐Crafts acylation copolycondensation naphthalene amide thermal property |
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