Table 3. Results of O-ATRP of MMA in Continuous Flow for the Synthesis of PMMA with Tunable Molecular Weightsa.
run no. | [MMA]:[DBMM]:[4] | Conv. (%) | Mw (kDa) | Mn (kDa) | Đ (Mw/Mn) | Theo. Mn (kDa) | I* (%) |
---|---|---|---|---|---|---|---|
1 | [1000]:[20]:[1] | 73 | 6.3 | 5.4 | 1.17 | 3.6 | 68 |
2 | [1000]:[15]:[1] | 48 | 3.7 | 3.0 | 1.24 | 3.2 | 108 |
3 | [1000]:[10]:[1] | 69 | 9.0 | 7.2 | 1.25 | 6.9 | 95 |
4 | [1000]:[5]:[1] | 76 | 25.2 | 19.3 | 1.30 | 15.3 | 79 |
5 | [1000]:[2]:[1] | 61 | 43.0 | 24.4 | 1.77 | 30.4 | 125 |
6 | [250]:[10]:[1] | 50 | 2.2 | 1.8 | 1.18 | 1.3 | 69 |
7 | [500]:[10]:[1] | 61 | 4.3 | 3.8 | 1.13 | 3.1 | 81 |
8 | [1500]:[10]:[1] | 85 | 18.9 | 13.6 | 1.39 | 12.7 | 94 |
9 | [2000]:[10]:[1] | 76 | 21.3 | 15.4 | 1.38 | 15.2 | 98 |
10 | [3000]:[10]:[1] | 79 | 29.9 | 20.5 | 1.46 | 23.6 | 115 |
11 | [4000]:[10]:[1] | 74 | 35.3 | 22.4 | 1.58 | 29.5 | 131 |
12 | [5000]:[10]:[1] | 65 | 37.0 | 22.2 | 1.67 | 32.6 | 147 |
[MMA]:[DBMM]:[4] = [X]:[Y]:[1]; 3.73 mM of 4, with 2:3 of MMA to DMA by volume and 160 cm tubing reactor irradiated by 3000 K fluorescent tubular lamp. Results were achieved using a 120 min residence time at a flow rate of 5.41 μL/min.