Chinese Journal of Applied Chemistry ›› 1990, Vol. 0 ›› Issue (3): 72-75.

• Report • Previous Articles     Next Articles

FRACTURE TOUGHNESS OF CHINA-MADE POLY(PHENYLENE ETHER KETONE)(PEK-C)

He Tianbai, Liu Weilian, Zhang Yan, Chen Tianlu, Li Binyao   

  1. Laboratory of Polymer Physics, Changchun Institute of Applied Chemistry, Academia Sinica, Changchun 130022
  • Received:1989-06-26 Revised:1989-10-12 Published:1990-06-10 Online:1990-06-10

Abstract: China-made poly(phenylene ether ketone)(PEK-C)is an amorphous high-performancethermoplast with glass transition temperature 231℃, and tensile modulus 2.43GPa, tensilestrength 101 MPa and elongation at break 6.1% at room temperature. Single edge notchedspecimens were used to measure fracture toughness K1c and critical strain energy releaserate G1c in terms of linear elastic theory as well as critical J-integral value J1c in termsof elastic-plastic theory. The values of K1c, G1c and J1c for PEK-C are, respectively,2.34 MPa√m, 2.1 kJ/m2 and 2.76 kJ/m2 compared wih K1c 2. 86 MPa√m and G1c 2. 07kJ/m2for PEEK of ICI and K1c 1. 96 MPa√m and G1c 1 kJ/m2 for PEKK of DuPont.

Key words: polyphenylene ether ketone, fracture toughness, fracture