Abstract
Plasma surface treatment was carried out by using CF4 gas for polyvinylchloride (PVC) powder to improve its charge retention ability. An rf CF4 plasma was generated in a flask using a pair of external electrodes connected to an rf generator of 13.56MHz. The plasma treatment was performed at the rf power of 40W and the gas pressure of 27Pa for 2h. It was confirmed that the plasma treatment enhanced the charge retention ability of the PVC powder. The plasma treatment shifted the charging tendency of the PVC powder in negative direction. The plasma treatment also improved the hydrophobicity, fluidity and thermal stability of the PVC powder.
