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Surface modification of polyethylene and magnetite powders by combination of fluidization and plasma polymerization
Author(s) -
Inagaki N.,
Tasaka S.,
Ishii K.
Publication year - 1993
Publication title -
journal of applied polymer science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.575
H-Index - 166
eISSN - 1097-4628
pISSN - 0021-8995
DOI - 10.1002/app.1993.070480812
Subject(s) - polyethylene , materials science , plasma polymerization , polymerization , polymer , fluidization , chemical engineering , magnetite , surface modification , polymer chemistry , fluidized bed , organic chemistry , composite material , chemistry , metallurgy , engineering
A new surface modification process of powders was attempted, using the combination of fluidization and plasma polymerization techniques. This study shows that the combination of the fluidization and plasma polymerization techniques is useful in the surface modification of powders. Polyethylene and magnetite powders were first fluidized, and then were modified in the fluidization state by the plasma polymers of tetrafluoroethylene (TFE). XPS spectra of the modified powders showed that the surfaces of the polyethylene and magnetite powders were coated with fluorine‐containing polymers, and that the polymers were mainly composed of CH, CF, and CF 2 groups. The elemental composition (F/C atomic ratio) and the composition of the fluorinated carbons in the plasma polymers were dependent on the W/FM parameter, as well as the TFE concentration in the TFE/Ar mixture. It is emphasized that the W/FM parameter is a factor used to control the chemistry of the plasma polymerization reactions. The triboelectric charge of the magnetite powders, when modified by the plasma polymerization of the TFE/AR mixtures, was higher than the usnmodified by about two. The static electrification properties of the powders can changed by the plasma‐polymer‐coating. © 1993 John Wiley & Sons, Inc.