高等学校化学学报

高等学校化学学报 ›› 2001, Vol. 22 ›› Issue (10): 1757.

• 研究论文 • 上一篇    下一篇

不同结晶状态的聚丙烯材料的声发射研究

徐涛1, 雷华2, 于杰2, 谢长生1   

  1. 1. 华中科技大学材料学院, 武汉 430074;
    2. 贵州工业大学, 贵阳 550003
  • 收稿日期:2001-03-23 出版日期:2001-10-24 发布日期:2001-10-24
  • 通讯作者: 徐　涛(1969年出生),男,博士,博士后,主要从事高分子结构与性能研究.E-mail:xlht@263.net E-mail:xlht@263.net
  • 基金资助:

    贵州省省长资金(批准号:2001-03);贵州工业大学学校基金(批准号:99-312)资助

The Research of Acoustic Emission with Different Crystalline Morphology of Polypropylene

XU Tao1, LEI Hua2, YU Jie2, XIE Chang-Sheng1   

  1. 1. Material School, Huazhong University of Science and Technology, Wuhan 430074, China;
    2. Guizhou University of Technology, Guiyang 550003, China
  • Received:2001-03-23 Online:2001-10-24 Published:2001-10-24

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被引次数

2

摘要： 用MISTRAS2001声发射监测系统对加入一定量成核剂(0～2.0%)的聚丙烯材料进行冲击过程声发射研究,同时记录了冲击过程的应力-时间曲线.结果表明,在成核剂加入量为0.4%时,冲击强度出现极大值,与之相对应,其声发射信号最为丰富,声发射振铃计数最高.裂纹扩展阶段的声发射信号占主导地位,随成核剂含量增大,材料冲击断裂过程中裂纹萌生阶段AE计数呈上升趋势,而裂纹扩展阶段的AE计数呈先上升后下降的趋势.同时裂纹萌生功和裂纹扩展功也呈现相同的变化趋势,与断面特征区特征参量的变化相对应.

关键词: 聚丙烯, 冲击实验, 声发射

Abstract: The Acoustic Emission within the process of instrumented impact test was researched with polypropylene materials filled with nucleating agent(mass fraction, 0-2.0%) by the MISTRAS 2001 AE SYSTEM. It was shown that at the 0.4%(mass fraction) content of nucleating agent, the notched impact strength showed a maximum value, at the same time, the AEcounts also reached the highest level. With the increase of nucleating agent, AEcounts of crack initiating stage in the process of impact fracture tend toward the increase, but the AEcounts of crack growth stage reaches a maximum value. It has the same transformation tendency with the characteristic parameter of fracture surface.

Key words: Polypropylene, Instrumented impact test, Acoustic emission

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