Studies on polymer-metal interfaces, 3 - An analysis of interfacial characteristics between amine-functionalized polystyrene/copper and between hydroxyl-functionalized polystyrene/copper
Dh. Kim et al., Studies on polymer-metal interfaces, 3 - An analysis of interfacial characteristics between amine-functionalized polystyrene/copper and between hydroxyl-functionalized polystyrene/copper, MACRO CH P, 201(18), 2000, pp. 2699-2704
Full Paper: The interfacial characteristics between amine-functionalized po
lystyrene/copper and between hydroxyl-functionalized polystyrene/copper wer
e investigated by adhesion strength measurements and reflection absorption
infrared (RAIR) spectroscopy. Poly(styreneco-4-co-4-aminostyrene) (PS-NH2)
and poly(styrene-co-4-hydroxystyrene) (PS-OH) containing ca. 1.5 and 1.7 mo
l-% of comonomers, respectively, were synthesized by anionic polymerization
. The adhesion strength between PS-OH and copper is higher than that betwee
n PS-NH2 and copper. The analysis with RAIR spectroscopy shows that both th
e NH2 group in PS-NH2 and the OH group in PS-OH interact specifically with
the copper surface. RAIR spectroscopy also shows that the OH group in PS-OH
is oriented in a parallel direction to the copper surface and that the C-O
bond is oriented in a direction slightly inclined from the normal surface.
The MH2 group in PS-NH2 has two orientations, while the orientation of the
C-N bond could not be identified precisely from the RAIR spectrum.
[GRAPHICS]
Schematic illustration of the transition dipole moment directions of the sy
mmetric and asymmetric NH2 stretching modes onto metal surface for two diff
erent orientations.