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Surface state of polymers investigated by low temperature plasmas
Author(s) -
Yasuda H.
Publication year - 1993
Publication title -
makromolekulare chemie. macromolecular symposia
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.257
H-Index - 76
eISSN - 1521-3900
pISSN - 0258-0322
DOI - 10.1002/masy.19930700106
Subject(s) - vicinal , arrhenius plot , contact electrification , polymer , thermodynamics , plasma , contact angle , analytical chemistry (journal) , arrhenius equation , chemistry , kinetic energy , materials science , activation energy , composite material , chromatography , organic chemistry , physics , quantum mechanics , triboelectric effect
The concept of the equilibration of surface states in contact is examined by the measurement of the contact electrification and separation currents, and applied to the investigation of the evolution of the surface state due to a change of contacting medium (from air to water) by following the surface concentration (by ESCA) of labeling atoms (F), which were incorporated by a low temperature plasma (of CF 4 ), as a function of water immersion time and temperature. The kinetic rate constants for such changes of surface configuration follow a typical Arrhenius plot, which shows a conspicuous break at a surface transition temperature T s . T s 's observed against air coincide with the glass transition temperature T g 's of the corresponding polymers. T s 's observed against water, however, are found to be independent of T g and consistently near 15 °C, which coincides with the major Drost‐Hansen temperature of vicinal water. The surface state of water is the dominant factor in this case.