Table 2.
Concentration of unsaturated moieties in poly(ether carbonate)s 3 a–c, 4–6 and viscoelastic behavior upon exposure to UV light.
| Entry | Sample | Unsaturated moieties[a] | t onset [b] | t g [b] | G′12min | |
|---|---|---|---|---|---|---|
| maleate [mol %] | allyl [mol %] | [min] | [min] | [kPa] | ||
| 1 | 3 a | 1.6 | 1.4 | 3.6 | 9.3 | 0.4 |
| 2 | 3 b | 3.3 | 2.8 | 2.8 | 6.6 | 5.8 |
| 3 | 3 c | 5.9 | 5.9 | 1.2 | 5.3 | 18.8 |
| 4 | 4 | 6.0 | 5.8 | 0.8 | 4.3 | 41.8 |
| 5 | 5 | 6.0 | – | >60 | n.o. | n.o. |
| 6 | 6 | – | 6.0 | >60 | n.o. | n.o. |
| 7 | 5 + 6 | 3.0 | 3.0 | 2.0 | 6 | 6.0 |
[a] Determined by 1H NMR spectroscopy. [b] 40 °C, determined with a rheometer equipped with a plate–plate measuring system; t onset=curing onset, t g=gel time; G′12min=storage modulus after 12 min exposure to UV light; n.o. not observed.