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Connection of surface tension with multiple tribological properties in epoxy + fluoropolymer systems
Author(s) -
Brostow Witold,
Cassidy Patrick E,
Macossay Javier,
Pietkiewicz Dorota,
Venumbaka Sreenu
Publication year - 2003
Publication title -
polymer international
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.592
H-Index - 105
eISSN - 1097-0126
pISSN - 0959-8103
DOI - 10.1002/pi.1283
Subject(s) - fluoropolymer , materials science , tribology , epoxy , composite material , surface tension , curing (chemistry) , scratch , polymer , polyester , thermodynamics , physics
Contact angles of free liquids on solid samples were measured and the van Oss–Good method was applied for evaluating surface tensions of the solids. A parachor method was used for comparison: in this case the respective values were calculated for the polymer solids from molecular and group contributions. Surface tensions were computed from the parachors and the two methods compared. Effects of varying the fluoropolymer added to the epoxy before curing are discussed. For a given fluoropolymer, effects of changing its concentration on surface tension have also been evaluated and compared to the changes in scratch resistance (scratch penetration depth, recovery depth) and in static and dynamic friction. Morphological and phase structure changes are reflected in all these properties, showing a strong connection between the surface tension and tribological properties. Copyright © 2003 Society of Chemical Industry