TABLE 4.
Summary of the Coverage Data for the Adsorption of Diblock Copolymers from a Good Solvent for Both the PS and the PMMA Blocks (i.e., Nonpreferential Solvent) Calculated from the Experimental Results Shown in Figure 3 and Using the Two Geometric Correction Factors in Eq 14; Columns Marked by a Star Represent the Cases of “Short Polymers” as Explained in the Texta
| γ |
||||||||
|---|---|---|---|---|---|---|---|---|
| 0.03 | 0.07 | 0.08 | 0.10 | 0.16* | 0.25 | 0.28 | 0.54* | |
| NA (NPMMA) | 2800 : | 1658 | 1283 | 1520 | 259 | 635 | 420 | 112 |
| NB (NPS) | 452 | 972 | 923 | 1938 | 243 | 2500 | 1598 | 686 |
| Davg = 5 nm | 0.4 | 0.5 | 0.4 | 0.3 | 0.4 | 0.4 | 0.5 | 0.4 |
| Davg = 37 nm | 9.3 | 7.0 | 5.6 | 4.2 | 7.4 | 5.6 | 6.8 | 6.1 |
| Davg = 97 nm | 26.5 | 22.6 | 16.4 | 16.2 | 22.8 | 13.9 | 17.5 | 22.3 |
| Davg = 400 nm | 51.6 | 45.6 | 47.1 | 48.5 | 50.3 | 51.3 | 52.1 | 40.2 |
| surface | 57.2 | 58.7 | 50.1 | 50.3 | 57.3 | 60.0 | 55.7 | 51.6 |
a
The results for NA = 420 seem to give results that are marginal between long and short polymers.