Modern Polymer Spect..

134
3 I 'ibrutioiwl S'Jectra us LI Probe of' Structud O~tler
y (w.
i 56
I
HCf
100
50
C
Figure 3-18 (c)
The object of the next step is to apply IIM to identify the origin of the various
peaks calculated in the g(v) of the mixtures. First, we consider the random distribution
of 25"h DCl defects in a host lattice of HCI (Figure 3-21); the total number
of units in this calculation is 100. Let Z be the number of chemical units within the
defect. Moreover, for sake of completeness, let us also associate qualitatively to
each motion its corresponding dipole moment changes. Let us assume that each bar
in Figure 3-21 gives not only the vibrational amplitude, but also the dipole moment