Table 2.
Thermoresponsive property and synthesis of PMOEAm-b-PDMAm and PMOEAm-b-PEOEAm via the hydrosilylation-promoted GTP of MOEAm with Me2EtSiH using B(C6F5)3 as the catalyst, followed by the 2nd GTP of DMAm or EOEAm, respectively. a.
| Run | Polymer | 1st GTP b | 2nd GTP c |
Tcp e °C |
||||
|---|---|---|---|---|---|---|---|---|
| [MOEAm]0/[Me2EtSiH]0 |
Mn,calcd /kg mol−1 |
Mn,SEC (Đ) d /kg mol−1 |
[DMAm or EOEAm]0 |
Mn,calcd /kg mol−1 |
Mn,SEC (Đ) d /kg mol−1 |
|||
| 7 | PMOEAm30-b-PDMAm70 | 30/1 | 5.6 | 5.5 (1.09) | 70 | 12.5 | 12.5 (1.08) | - f |
| 8 | PMOEAm40-b-PDMAm60 | 40/1 | 7.5 | 7.5 (1.10) | 60 | 13.4 | 13.4 (1.10) | - f |
| 9 | PMOEAm50-b-PDMAm50 | 50/1 | 9.4 | 9.6 (1.13) | 50 | 14.3 | 14.4 (1.13) | 58.0 |
| 10 | PMOEAm60-b-PDMAm40 | 60/1 | 11.2 | 11.1 (1.10) | 40 | 15.2 | 15.1 (1.09) | 56.5 |
| 11 | PMOEAm70-b-PDMAm30 | 70/1 | 13.1 | 12.9 (1.11) | 30 | 16.1 | 16.0 (1.10) | 55.8 |
| 12 | PMOEAm80-b-PDMAm20 | 80/1 | 15.0 | 15.1 (1.12) | 20 | 16.9 | 16.8 (1.10) | 53.3 |
| 13 | PMOEAm90-b-PDMAm10 | 90/1 | 16.8 | 16.7 (1.13) | 10 | 17.8 | 17.6 (1.15) | 51.4 |
| 14 | PMOEAm30-b-PEOEAm70 | 30/1 | 5.6 | 5.3 (1.09) | 70 | 20.7 | 21.0 (1.10) | - f |
| 15 | PMOEAm40-b-PEOEAm60 | 40/1 | 7.5 | 7.2 (1.08) | 60 | 20.4 | 20.5 (1.09) | - f |
| 16 | PMOEAm50-b-PEOEAm50 | 50/1 | 9.4 | 9.1 (1.12) | 50 | 20.1 | 20.2 (1.11) | 43.5 |
| 17 | PMOEAm60-b-PEOEAm40 | 60/1 | 11.2 | 10.9 (1.10) | 40 | 19.8 | 19.4 (1.12) | 38.0 |
| 18 | PMOEAm70-b-PEOEAm30 | 70/1 | 13.1 | 12.8 (1.11) | 30 | 19.6 | 19.1 (1.10) | 33.5 |
| 19 | PMOEAm80-b-PEOEAm20 | 80/1 | 15.0 | 15.0 (1.11) | 20 | 19.3 | 19.0 (1.09) | 29.7 |
| 20 | PMOEAm90-b-PEOEAm10 | 90/1 | 16.8 | 16.4 (1.10) | 10 | 19.0 | 18.8 (1.11) | 25.0 |
a Solvent, CH2Cl2; [Me2EtSiH]0/[B(C6F5)3]0, 0.1; room temperature; Ar atmosphere; monomer conversion determined by 1H NMR spectra in CDCl3, >99.9%. b [MOEAm]0, 1.0 mol L−1; time, 12 h and 18 h (runs 17 and 18). c [DMAm or EOEAm]0 = 100 − [MOEAm]0; time, 36 h (runs 7−9), 24 h (runs 10−13), 12 h (runs 14−16), and 6 h (runs 17 and 18). d The molecular mass of the polymers was determined using size exclusion chromatography equipped with a refractive index detector in dimethylformamide (DMF) containing 0.01 mol L−1 of lithium chloride and using polymethylmethacrylate (PMMA) as standards. e The cloud point temperature of [MOEAm] was determined by measuring its ultraviolet-visible spectrum in water at a concentration of 10 g L−1. f Not determined due to insoluble in water.