Fig. 12 (a–c
0 ) Confocal laser scanning microscopy (CLSM) images of PVA hydrogels obtained
by imposing a single freeze–thaw cycle on initial water solutions of PVA containing poly(ethylene
glycol) PEG-600 of weight composition PVA/PEG/water 8/10/90 (a, a
0 ), 12/10/90 (b, b
0 ), and
16/10/90 (c, c
0 ). All samples were examined after washing out PEG-600 and after addition of
5-dichlorotriazine fluorescein as fluorochrome. Images of bulk structures were taken at 10 μm (a,
a
0 ) and 15 μm under the surface (b, b
0 , c, c
0 ) at two different magnifications as indicated
[59]. (Reproduced with permission from [59]. Copyright 2001 by Springer)
Kinetic Analysis of Cryotropic Gelation of Poly(Vinyl Alcohol)/Water. . .
181
0 ) Confocal laser scanning microscopy (CLSM) images of PVA hydrogels obtained
by imposing a single freeze–thaw cycle on initial water solutions of PVA containing poly(ethylene
glycol) PEG-600 of weight composition PVA/PEG/water 8/10/90 (a, a
0 ), 12/10/90 (b, b
0 ), and
16/10/90 (c, c
0 ). All samples were examined after washing out PEG-600 and after addition of
5-dichlorotriazine fluorescein as fluorochrome. Images of bulk structures were taken at 10 μm (a,
a
0 ) and 15 μm under the surface (b, b
0 , c, c
0 ) at two different magnifications as indicated
[59]. (Reproduced with permission from [59]. Copyright 2001 by Springer)
Kinetic Analysis of Cryotropic Gelation of Poly(Vinyl Alcohol)/Water. . .
181