Dispersive Component of Surface Energy

  1. Hello, I'm doing an MSc project concerned with the treatment of plastic polymers with an μ-APPJ. I have been getting a tonne of results on different plastics using an APPJ of He carrier gas with an Oxygen admixture of 1/2, 1 & 2%.

    However, in my analysis I'm unsure of what the dispersive component of the surface energy is and why it more or less stays the same.

    Can someone give me a definition of what it is? I think its to do with van der waals but nothing on the net is giving me a good answer.

    Is it supposed to stay the same irrespective of whether the material has been heated up or its polar component increases?

    How would I interpretate my data on the surface energies for example:


    For convention, -5mins to 0mins is the 5minutes of plasma treatment. I'm not measuring the plastic during this time, hence the constant values and the discontinuity when I first measure it after treatment.
    This is one of my preliminary results with Acetate plastic. Treated 1 run with He gas, 2nd run with He + O2. The legend will tell you. The dispersive components stay relatively the same, why?
  2. jcsd
  3. Can anyone tell me what the definition of Dispersive Component is?
  4. Bump, I still don't know what constitutes the Dispersive Component of Surface Energy.
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