Biomedical Engineering Reference
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10000
1000
100
Frozen
10
1
Room
temperature
0.1
0.01
0.01
0.1
1
10
100
f [Hz]
Figure 14.6. Variation of elastic (open circles) and loose moduli (open triangles) in the 0.1-
10 Hz frequency range of 3wt% aqueous HEC solutions irradiated with UV-vis light at room
temperature and in frozen state. Reproduced from [Petrov et al., 2006] with permission.
(a)
(b)
(c)
880
860
840
820
800
780
760
Wavenumber (cm -1 )
Figure 14.7. A fragment of FTIR spectra of dextran (a), glycidyl methacrylate derivatized
dextran (dx-MA) (b) and polymerized at
20 °C dx-MA (c). Arrow indicates a peak at 813 cm 1
originating from the double bond of the methacrylate group. Reproduced from [Plieva et al.,
2006c] with permission.
chromatography analysis [Plieva et al., 2004a]. When the MGs were prepared
from macromer precursors (as dextran with grafted polymerizable double bonds,
dextran-methacrylate, dextran-MA), the content of remaining non-reacted mac-
romer (dextran-MA) was hardly detectable (Figure 14.7) as demonstrated by
FTIR analysis [Plieva et al., 2006c].
The properties of MGs depend on degree and nature of cross-linkers used
for the preparation of MGs. The highly cross-linked pAAm-MG monoliths (with
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