Table 2.
Copolymer | Precursor PPFMA polymer |
Feed Ratioa All-NH2 / HP- NH2 (% / %) |
AllMAb (%) |
AllMAb (n) |
HPMAb (%) |
HPMAb (n) |
PFMA conversion (%) |
DPc (−) |
Mn, thd (g.mol−1) |
Mn, SECe (g.mol−1) |
Mw/Mne (−) |
---|---|---|---|---|---|---|---|---|---|---|---|
5 | 1 | 50 / 50 | 38 | 76 | 44 | 88 | 82 | 199 | 21900 | 24500 | 1.35 |
6 | 1 | 20 / 80 | 16 | 32 | 68 | 135 | 84 | 199 | 23000 | 24500 | 1.32 |
7 | 1 | 0 / 100 | 0 | 0 | 88 | 175 | 88 | 199 | 24700 | 24900 | 1.45 |
8 | 2 | 50 / 50 | 47 | 126 | 48 | 129 | 95 | 269 | 33900 | 28900 | 1.41 |
9 | 2 | 20 / 80 | 20 | 54 | 69 | 186 | 89 | 269 | 33000 | 33500 | 1.42 |
10 | 2 | 0 / 100 | 0 | 0 | 92 | 247 | 92 | 269 | 34800 | 36000 | 1.47 |
11 | 3 | 50 / 50 | 48 | 178 | 46 | 171 | 94 | 372 | 46400 | 43000 | 1.52 |
12 | 3 | 20 / 80 | 20 | 74 | 72 | 268 | 92 | 372 | 47000 | 44400 | 1.50 |
13 | 3 | 0 / 100 | 0 | 0 | 92 | 345 | 92 | 372 | 48600 | 47800 | 1.57 |
14 | 4 | 50 / 50 | 47 | 253 | 45 | 243 | 92 | 539f | 65788 | 69500 | 1.48 |
15 | 4 | 0 / 100 | 0 | 0 | 91 | 490 | 91 | 539f | 69200 | 76000 | 1.41 |
Feed ratio of allyl amine (All-NH2) and 2-hydroxypropylamine (HP-NH2) in the post-polymerization modification reaction.
Percentage/number of allyl methacrylamide and 2-hydroxypropyl methacrylamide units determined by 1H-NMR spectroscopy after post-polymerization modification of PPFMA with either 2-hydroxypropylamine or a feed mixture of 50 or 80 mol. % 2-hydroxypropylamine and 50 or 20 mol. % allylamine, respectively.
Number average degree of polymerization of the PPFMA precursor as determined from 1H-NMR spectroscopy from comparison of the protons on the RAFT agent end group to the -CH2 backbone peaks.
Theoretical number-average molecular weight of the post-modified copolymers using the number-average degree of polymerization of the PPFMA precursor and the number of allyl methacrylamide and 2-hydroxypropyl methacrylamide repeat units, respectively as determined from 1H-NMR spectroscopy.
Number-average molecular weight/polydispersity determined from DMF SEC.
Number average degree of polymerization of the PPFMA determined from DMF SEC after post-modification with 2-hydroxypropylamine to yield poly(2-hydroxypropyl methacrylamide).