Table 2. Effect of Light Intensity on Conversion of MA during Eosin Y-Mediated ATRP from PVDF-CTFEa.
| no. | light intensity at 520 nm (mW/cm2) | temperature (°C) | time (h) | conv.b (%) | Mnth (kDa) | Mnrelc (kDa) | Đc | GD per chaind | DPth | DPNMRe | Iefff |
|---|---|---|---|---|---|---|---|---|---|---|---|
| 1 | 6.20 ± 0.71 | 25.6 | 0.6 | 7.9 | 121 | N.A. | N.A. | N.A. | 1.6 | N.A. | N.A. |
| 2 | 6.20 ± 0.71 | 25.6 | 1 | 13.8 | 130 | 83.4 | 2.40 | 5.3 | 2.8 | 49 | 5.7% |
| 3 | 11.8 ± 1.5 | 26 | 0.6 | 19.3 | 139 | N.A. | N.A. | N.A. | 3.9 | N.A. | N.A. |
| 4 | 11.8 ± 1.5 | 26 | 1 | 44.0 | 178 | 200 | 2.70 | 11 | 8.8 | 63 | 14.0% |
| 5 | 23.8 ± 2.0 | 28.2 | 0.6 | 53.4 | 193 | 283 | 1.87 | N.A. | 10.7 | N.A. | N.A. |
| 6 | 23.8 ± 2.0 | 28.2 | 1 | 73.8 | 226 | 266 | 2.16 | 15.6 | 14.8 | 85 | 17.4% |
| control | 23.8 ± 2.0 | 28.2 | 1 | <1 | N.A. | N.A. | N.A. | N.A. | N.A. | N.A. | N.A. |
a
MA/Cl/CuCl2/Me6TREN/EY·Na2 = 5000/250/1/12/0.1, [MA] = 2 M, [PVDF-CTFE] = 0.116 g/mL, [Cu]/[M] = 200 ppm, DMSO/DMF = 8/2, v/v.
b
Conversion determined from NMR.
c
Number-averaged molecular weight and dipersity determined from DMF GPC with calibration against PMMA.
d
Grafting density determined from NMR.
e
PMA degree of polymerization determined from NMR.
f
Initiation efficiency determined as DPth/DPNMR*100%, control was carried out without PVDF-CTFE. Calculations were carried out according to NMR spectra given in Figures S15–S17 (details in captions).