Journal of South China University of Technology (Natural Science Edition) ›› 2009, Vol. 37 ›› Issue (8): 150-154.

• Materials Science & Technology • Previous Articles    

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．

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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