Table 4.
Physical properties of PUs [15].
| PUs | Tg (°C) | Topt (°C) | Field Applied (kV) | Td (°C) |
|---|---|---|---|---|
| Ia | 140 | 140 | 2.0 | 207 |
| IIa | 147 | 145 | 3.0 | 221 |
| Ib | 155 | 150 | 3.0 | 227 |
| IIb | 165 | 170 | 3.0 | 273 |
| Ic | - | 180 | 2.5 | 250 |
| IIc | - | 205 | 3.0 | 276 |
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