Chem. J. Chinese Universities ›› 2021, Vol. 42 ›› Issue (6): 2041.doi: 10.7503/cjcu20200689

• Polymer Chemistry • Previous Articles     Next Articles

High Temperature Resistant and Soluble Polyimide Resins and Their Composites

WANG Xianwei1, KE Hongjun2, YUAN Hang2, LU Gewu2, LI Liying2, MENG Xiangsheng1(), SONG Shulin1, WANG Zhen1   

  1. 1.Laboratory of Polymers and Composites,Ningbo Institute of Materials Technology and Engineering,Chinese Academy of Sciences,Ningbo 315201,China
    2.Aerospace Institute of Special Materials and Technology,Beijing 100074,China
  • Received:2020-09-16 Online:2021-06-10 Published:2021-02-03
  • Contact: MENG Xiangsheng E-mail:mengxiangsheng@nimte.ac.cn
  • Supported by:
    the Key Research and Development Program of Zhejiang Province, China(2021C01126)

Abstract:

Two soluble imide oligomers and their composites were prepared, and their processability, the interfacial morphology, and thermal, dielectric and mechanical properties were systematically investigated. The results revealed that the oligomers possessed excellent processability, evidenced by their good solubility in aprotic solvents and low melt viscosities. The 5% mass loss temperatures of the cured resins were higher than 550 ℃. The temperature of glass transition(Tg) values of cured PI-1 and PI-2 were 430 and 380 ℃, respectively. The quartz fiber reinforced composites displayed relatively low dielectric constant and dielectric loss at a frequency of 1─3 GHz. Carbon fiber/PI-1 composite retained 62% of its original flexural strength and 48% of its original inter-laminar shear strength at 420 ℃, indicative of their excellent mechanical properties at eleva-ted temperatures. Composites with a thickness higher than 45 mm were fabricated through compress-molding, which further demonstrates the excellent processability of the resins.

Key words: Polyimide resin, Solubility, Composite, Mechanical property, Thermal property

CLC Number: 

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