Journal
POLYMER
Volume 43, Issue 25, Pages 6683-6693Publisher
ELSEVIER SCI LTD
DOI: 10.1016/S0032-3861(02)00674-2
Keywords
roughness exponent; self-affinity; fracture surface
Categories
Ask authors/readers for more resources
In order to provide more evidence concerning the controversial topic, conjectured for the first time in the early 90's, that the roughness exponent of the self-affine fracture surfaces has a value close to 0.8, the self-affine behavior of fracture surfaces of both, semi-crystalline polypropylene (PP) and amorphous polystyrene (PS) was analyzed. The topography of polymeric fracture surfaces was obtained using atomic force microscopy, AFM, and the corresponding height profiles were processed using the variable bandwidth method (standard deviation criteria) to obtain the roughness exponent of the surfaces. Prior to that, the appropriate AFM operating conditions, in contact mode, were found. The average roughness exponent was 0.770 +/- 0.09 for the fracture surfaces of polypropylene and 0.707 +/- 0.07 for polystyrene. These results agree with values for different materials often reported in the literature that support 0.8 has a possible 'universal' value. Hence, it is considered that our results are in good agreement with the conjectured value even for polymeric materials. (C) 2002 Elsevier Science Ltd. All rights reserved.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available