Journal of Polymer Research

, 26:252 | Cite as

Research on the relationship between structure and properties of the soluble polyaryl ether ketone terminated with phthalonitrile

  • Yuhan Tian
  • Zejun PuEmail author
  • Jialing Xia
  • Linqing Hu
  • Jie Cheng
  • Jiachun ZhongEmail author


A novel soluble poly(aryl ether ketone) (PAEK) terminated with 4-nitrophthalonitrile was designed and synthesized, which was used to solve the problem of difficult solution processing. Then, a series of cross-linked PAEK films with different thermal treatment temperatures were fabricated by using 4,4-bis(3,4-dicyanophenoxy)biphenyl (BPH) as a novel cross-linking agent, improving the glass transition temperature (Tg) of the traditional PAEK. Then, the fourier transform infrared (FT-IR) spectrum, X-ray diffraction (XRD), differential scanning calorimetry (DSC), thermo gravimetric analysis (TGA), dynamic mechanical analysis (DMA), mechanical testing machine and LCR meter were used to investigate the microstructure, thermal, mechanical and dielectric properties of PAEK films, respectively. The results indicated that the increase in heat-treatment time and temperature are beneficial for the improvement of the value of Tg and T5%, and the excellent thermal stability and mechanical properties of PAEK films are demonstrated. Compared to PAEK-1 film, the Tg and T5% both increased by 63 °C for PAEK-4 film. Significantly, the tensile strength of PAEK-3 film (42 MPa) reaches the highest value in comparison with other samples. In addition, the dielectric constants (ε) and loss tangent (tan δ) of PAEK-4 film is as low as 3.67 and 0.001 at 1 kHz, respectively. More importantly, the dielectric properties are found to be relatively stable to near the Tg value, which can be widely used for applications in dielectric energy storage at high temperatures.


Poly(aryl ether ketone) Cross-linking Dielectric properties Thermal stability 



The authors wish to thank for the Sichuan University of Science and Engineering Talent Introduction Project (No.2016RCL35), Opening Project of Key Laboratories of Fine Chemicals and Surfactants in Sichuan Provincial Universities (2018JXY04) and Major Project of Education Department in Sichuan (18ZA0346).

Author contributions

Besides, all the authors approved the final version of the manuscript.


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Copyright information

© The Polymer Society, Taipei 2019

Authors and Affiliations

  1. 1.College of Materials Science and Engineering, Material Corrosion and Protection Key Laboratory of Sichuan province, Key Laboratories of Fine Chemicals and Surfactants in Sichuan Provincial UniversitiesSichuan University of Science & EngineeringZigongChina

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