Abstract
The enhancement of thermal resistance and mechanical properties for the soluble poly(aryl ether ketone)s is an important research topic. Based on the idea of introducing twisted N-heterocyclic structure and utilizing the restriction of intramolecular chain rotation by bulky pendant groups, the thermo-resistance, mechanical properties, and surface properties of polymers are modulated while ensuring their solubility. A novel bisphenol-like monomer 1′,4-di(biphenyl)-6,6′-biphthalazin-1,4(2H,3H)-dione (DBBD) and corresponding N-heterocycle copoly (aryl ether ketone)s with pendant biphenyl groups (PDPEKs) are prepared. PDPEKs exhibit good thermal stability in air and nitrogen, and the glass transition temperature (Tg) is in the range of 288–347 °C. In addition, the storage modulus retention rate of PDPEKs reaches 60.6 % at 250 °C. PDPEKs exhibit good solubility in N-methylpyrrolidone and 1,1,2,2-tetrachloroethane, performing good film-formation properties. The tensile strength of PDPEKs films is between 102 and 121 MPa, the Young's modulus is between 2.01–2.30 GPa, and the water contact angle of PDPEKs is in the range of 79°–84°.
Published Version
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