TABLE I.
Properties of PFPh and PFBT copolymer thin films prepared in this study.
| Polymer | υ (rpm)a | d (nm)b | τa (ps) | ν (GHz) | cL (m s-1) | R12 (%)c |
|---|---|---|---|---|---|---|
| PFPh | 500 | 91.2 ± 3.6 | 143 ± 2 | 7.0 ± 0.1 | 2550 ± 140 | 45.8 |
| PFBT | 500 | 152.8 ± 2.9 | 215 ± 2 | 4.6 ± 0.1 | 2490 ± 150d | 46.8 |
| 500 | 130 ± 21 | 240 ± 3 | 4.2 ± 0.1 | |||
| 1000 | 92.0 ± 2.7 | 162 ± 2 | 6.2 ± 0.1 | |||
| 2000 | 75.2 ± 3.3 | 126 ± 3 | 8.0 ± 0.2 | |||
| 4000 | 65.7 ± 2.7 | 120 ± 2 | 8.3 ± 0.1 |
a
Rotational speed employed for spin-coating of the polymer films.
b
Thickness of polymer thin films determined from AFM measurements.
c
Intensity reflection coefficient for the interface between the polymer and borosilicate (Duran) glass.
d
From the fit to the five data points for PFBT.