Biomedical Engineering Reference
In-Depth Information
)forPXcMApolymerson0.01 MHClat25
◦
C. The
symbols
are the same as Fig. 2. The
dashed lines
are guidelines for each polymer and the
solid line
shows the slope of tan
δ
at high
Π
Fig. 25
Loss tangent (tan
δ
2
. The values repre-
sent averages over three wave vectors with error bars amounting to about 30%omitted
for clarity. In both plots, PHcMA data in the dilute regime are not included since they
are scattered much more than the rest, whereas the conclusion drawn for the semi-dilute
regime is not affected by the omission
or at small A; tan
δ
∼
A
-10
∼
Π
The results of this study are summarized as follows. The principal mech-
anism of viscous dissipation of this series of PXcMA polymers at the A/W
interface occurs by interactions between the polymer chains and the inter-
