华南理工大学学报(自然科学版) ›› 2009, Vol. 37 ›› Issue (8): 150-154.

• 材料科学与技术 • 上一篇    

PP/硅藻土复合材料断口分形维数及其与冲击强度的关系

吴成宝 梁基照   

  1. 华南理工大学 机械与汽车工程学院, 广东 广州 510640
  • 收稿日期:2008-08-02 修回日期:2008-12-24 出版日期:2009-08-25 发布日期:2009-08-25
  • 通信作者: 梁基照(1953-),男,教授,博士生导师,主要从事聚合物材料及其加工成型的研究.E-mail:liangjz@scut.edu.cn E-mail:wuehengbo@126.com
  • 作者简介:吴成宝(1978-),男,博士生,主要从事聚合物复合材料性能表征研究.

Fracture-Surface Fractal Dimension of PP/Diatomite Composites and Its Relation to Impact Strength

Wu Cheng-bao  Liang Ji-zhao   

  1. School of Mechanical and Automotive Engineering, South China University of Technology, Guangzhou 510640, Guangdong, China
  • Received:2008-08-02 Revised:2008-12-24 Online:2009-08-25 Published:2009-08-25
  • Contact: 梁基照(1953-),男,教授,博士生导师,主要从事聚合物材料及其加工成型的研究.E-mail:liangjz@scut.edu.cn E-mail:wuehengbo@126.com
  • About author:吴成宝(1978-),男,博士生,主要从事聚合物复合材料性能表征研究.

摘要: 制备了硅藻土含量(体积分数)为0~15%的聚丙烯/硅藻土复合材料,在室温条件下测量了复合材料的7中击强度,采用扫描电镜观测了试样的冲击断口形貌,以投影覆盖法测算了断口的分形维数,并考察了它与冲击强度之间的关系.结果表明:试样断口分形维数的测算值在2.4754~2.5230之间,分形维数与冲击强度之间强的相关性表明断口分形行为显著;断口分形维数与冲击强度之间大致符合指数关系.

关键词: 聚丙烯, 硅藻土, 复合材料, 断口分形维数, 冲击强度

Abstract:

:PP/diatomite composites with the diatomite pared, and the impact strength of the composites was content (volume fraction) ranging from 0 to 15% were premeasured at room temperature. Then, the impact fracture morphology of the composites was investigated with SEM and the fracture-surface fractal dimension was measured by means of projective-covering method. Moreover, the relationship between the fractal dimension and the impact strength was analyzed. The results show that   the measured fractal dimension ranges from 2. 475 4 to 2. 523 0 ;  the strong relativity between the fractal dimension and the impact strength reveals an obvious fractal behavior of the fracture surface; and  there is an exponential relationship between the fractal dimension and the impact strength.

Key words: polypropylene, diatomite, composite, fracture-surface fractal dimension, impact strength