Plasma surface treatment of HDPE powders by CF4 plasma in a fluidized bed reactor

Summary

A plasma surface treatment of polymer powders was carried out in a fluidized bed reactor with CF₄ glow discharge. The chemical and physical properties of the modified HDPE powders have been determined by ESCA and DSC. With the plasma treatment, HDPE powders are fluorinated into CHF-CH₂, CHF-CHF and CF₂ groups without change of bulk property. The extent of fluorination increases up to 61% with the treatment time and rf power. The fluorination increase with the composite parameter [(W/FM)t] down to 2,000 GJ·s/kg, thereafter it remains constant.