Chemistry Reference
In-Depth Information
These results show the high hydrolytic stability of this polymer even in very
extreme immersion conditions (neutral or acidic medium) at 100, 170 and 180°C.
Hydrolysis effects can, therfore, be neglected in the study of PEI.
3.2. Water sorption characteristics of PEI
The essentials of the experimental results have already been reported [10, 11].
An example of sorption curves (mass gain m
t
against time t) [12] is shown in
Figure 3. The sorption curves are linear in t
1/2
in their initial part (0
≤
m
t
≤
0.6 m
∞
,
Figure 3. Sorption curves of water in PEI from 20°C to 120°C (100% R.H). m
t
(%) is the water
mass gain.
Search WWH ::
Custom Search