Table 3 Topographic parameters of the surfaces

From: The measurement of the surface energy of solids using a laboratory drop tower

 

Length scale

 

PP

PTFE

Parameter

20X

60X

100X

20X

60X

100X

Sa, nma

105

64

101

636

955

815

Sdr, %b

0.036

0.094

0.223

0.662

2.447

4.380

  1. a Arithmetic mean roughness
  2. b Developed surface area ratio
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