20


E


0 1000 2000 3000
 Mean Molecular Area (A2)


Figure 4-25. Compression-expansion hysteresis plot of PEO60-b-PCLll (target
 mN/m).


pressure = 18


0.25


 0.2


0.15




0.05


I
E
E
c


8 12
n; (mN Im)


16


Figure 4-26. Compressibility plots of Figure 4-25 (PEO60-b-PCLll, target pressure = 18 mN/m).
 Top curve: first compression. Bottom curve: first expansion, second compression, and
 second expansion.


4000