Table 1.
Living anionic copolymerization of A[St¦PD]/B[DPE¦PD]/C[St¦DPE] with a different feed ratio using n-BuLi as an initiator in cyclohexane.
| Comonomers (a) | Feed Ratio |
T | Time | Yield | Mn (b) | Ð (b) | |
|---|---|---|---|---|---|---|---|
| M1 | M2 | n1/n2 | [°C] | [min] | [%] | [kg/mol] | |
| A | B | 02:08 | 70 | 120 | >99 | 22.3 | 1.12 |
| A | B | 04:06 | 70 | 120 | >99 | 31.9 | 1.09 |
| A | B | 05:05 | 70 | 60 | >99 | 25.5 | 1.08 |
| A | B | 06:04 | 70 | 60 | >99 | 26.4 | 1.09 |
| A | B | 07:03 | 70 | 60 | >99 | 24.6 | 1.08 |
| A | B | 08:02 | 70 | 60 | >99 | 30 | 1.07 |
| A | B | 09:01 | 70 | 60 | >99 | 21.9 | 1.09 |
| A | C | 03:07 | 70 | 60 | >99 | 20.9 | 1.06 |
| A | C | 05:05 | 70 | 40 | >99 | 19.9 | 1.09 |
| A | C | 06:04 | 70 | 40 | >99 | 25.1 | 1.07 |
| A | C | 07:03 | 70 | 40 | >99 | 23.5 | 1.07 |
| A | C | 08:02 | 70 | 40 | >99 | 19.4 | 1.1 |
| A | C | 09:01 | 60 | 120 | >99 | 49.4 | 1.13 |
| B | C | 02:08 | 60 | 120 | >99 | 23.4 | 1.06 |
| B | C | 03:07 | 60 | 60 | 90.5 | 12.7 | 1.09 |
| B | C | 05:05 | 50 | 180 | 91.2 | 41.6 | 1.13 |
| B | C | 06:04 | 60 | 120 | 90.8 | 28.4 | 1.07 |
| B | C | 07:03 | 50 | 180 | 91.6 | 36.6 | 1.13 |
| B | C | 08:02 | 70 | 180 | >98 | 40.2 | 1.1 |
(a) All polymerization reactions were performed in cyclohexane with n-BuLi as initiator: monomer/solvent = 0.3 g/mL, [n-BuLi]0 = 1~2 × 10 −5 mol·L−1. (b) Determined by gel permeation chromatography (GPC), all original curves are shown in Figures S1–S3 (Supporting Information).