Chemistry Reference
In-Depth Information
results of the RPEuO polymers studied by TGA. It can be seen that in the first
temperature region, about 15 wt% loss occurs and 79-91 wt% of the weight
is lost in the second temperature region for all the RPEuO polymers.
Table 3.8 summarizes the thermal stability results of RPEuO polymers
studied by TGA.
3.4.4 Surface Tension of Aqueous HPESO Polysoaps
A series of aqueous solutions of the HPESO polysoaps with Na
1
,K
1
and
TEA
1
counterions were prepared, as mentioned above, and their dynamic
surface tensions were investigated. Table 3.9 lists the concentrations in-
vestigated for the HPESO polysoaps. The molecular weights were either 2.6
or 3.2 kg mol
1
.
Typical dynamic surface tension data for an aqueous HPESO salt are il-
lustrated in Figure 3.12. The data in Figure 3.12 shows triplicate measure-
ments on an aqueous HPESO salt of M
w
¼
3.2 kg mol
1
, with a TEA
1
Table 3.9 Polysoaps investigated in this work.
Counterion
a
M
w
/kg mol
1
Polysoap
K
1
HPESO-004K
2.615
TEA
1
HPESO-004A
2.615
Na
1
HPESO-003N
3.219
K
1
HPESO-003K
3.219
TEA
1
HPESO-003A
3.219
a
TEA
1
¼
Triethonalamonium.
Figure 3.12 Typical data from repeat measurement of the dynamic surface tension
of an aqueous polysoap on an automated pendant drop goniometer.
The polysoap had a M
w
of 3.2 kg mol
1
with the TEA
1
counterion.
