Abstract
Low power 2-phase AC plasma polymerization has been used to surface modify glassy carbon
substrates that are used as an experimental model for carbon fibers in reinforced composites. In
order to probe the role of carboxylic acid density on the interfacial adhesion strength a combination
of different plasma powers and monomer compositions was used. Maleic anhydride (MAR) and
1,2-methylenedioxybenzene (MDOB) were plasma deposited separately and as mixtures to create
layers with different surface compositions. In all cases the MAR was hydrolyzed to form carboxylic
acid groups. Some carboxylic acid are present on the MDOB surface as a result of the fragmentation
processes in the plasma. Chemical and physical changes were investigated as a function of plasma
power at constant polymerization time. Surface chemistry analysis was perfonned with x-ray
photoelectron spectroscopy and attenuated total veflectanc~ Fourier transform infrared spectroscopy.
Atomic force microscopy was used to measure the thickness of the plasma films and to monitor the
surface roughness for the different polymerization conditions. Finally, preliminary results of fracture
energy measurements of the plasma modified surfaces determined by a double cantilever method are
presented.
Original language | English |
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Journal | Journal of Vacuum Science & Technology. A: International Journal Devoted to Vacuum, Surfaces, and Films |
Pages (from-to) | 1108-1117 |
ISSN | 1553-1813 |
DOIs | |
Publication status | Published - 2007 |