应用化学 ›› 1990, Vol. 0 ›› Issue (3): 72-75.

• 研究简报 • 上一篇    下一篇

国产聚芳醚酮(PEK-C)的断裂韧性

何天白, 刘维莲, 张延, 陈天禄, 李滨耀   

  1. 中国科学院长春应用化学研究所高分子物理开放实验室 长春 130022
  • 收稿日期:1989-06-26 修回日期:1989-10-12 出版日期:1990-06-10 发布日期:1990-06-10
  • 基金资助:
    国家自然科学基金

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

摘要: 由于材料内部缺陷和裂纹的存在,导致材料在使用过程中发生破坏的现象,已引起了广泛的注意,并发展了一门专门的学科——断裂力学。断裂力学不仅研究材料中裂纹扩展的规律,还通过应力及能量分析,建立和测定材料断裂的判据,如材料的断裂韧性,为结构设计提供必需的材料参数。目前断裂力学的研究对象已从金属和陶瓷扩充到聚合物和复合材料[2]

关键词: 聚芳醚酮, 断裂, 断裂韧性

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