Modern Polymer Spect..

3200 2950 2700
Figure 1-21. IR spectra of backbone-deuterated
' ' ' ' ' 2950 I ' ' ' ' 27do polystyrene and poly(viny1 methyl ether) in the
Wavenumber
CH-stretching vibration region.
3200
2825
PVME melhoxyl
L
...'
- Figure 1-22. An asynchronous ZD IR
spectrum for the methoxyl vibration of
a blend of backbone-deuterated poly-
I
2850
, I O I
2820
, I 2850
I
2790 styrene and poly(viny1 methyl ether)
Wavenumber, v, [571.
Such a specific interaction most likely involves the lone-pair of electrons on the
methoxyl oxygen atom of poly(viny1 methyl ether) and n-electrons of the polystyrene
phenyl groups [54].
Figure 1-23 indicates only one methoxyl band is interacting with the polystyrene
phenyl group, even though there are two distinct IR contributions of poly(viny1
methyl ether) methoxyl groups, as already shown in Figure 1-22. The other
methoxyl band of poly(viny1 methyl ether) at 2824 cm-' is asynchronously correlated
with the phenyl bands of the polystyrene component (Figure 1-24). This result
suggests that while one component of polyivinyl methyl ether) methoxyl groups