Table 1.
Characterisation of material properties for polymers obtained using different polymerisation conditions for C3A and C6T using 1 mol% base at [C3A] = 1 M.
| Entry | Solvent | Base | %cisa | Mw (kg mol−1)b | Ε (MPa) | εbreak (%) | UTS (MPa) | Tg (°C)c |
|---|---|---|---|---|---|---|---|---|
| P1 | DMSO/MeOH (2:1) | DBU | 82 | 104.6 | 1278.4 ± 42.1 | 109 ± 28 | 70.4 ± 2.6 | 98 |
| P2 | DMSO | DBU | 73 | 131.4 | 1219.3 ± 48.0 | 158 ± 55 | 67.9 ± 4.2 | 94 |
| P3 | DMSO/CHCl3 (1:1) | DBU | 46 | 111.8 | 1111.7 ± 19.6 | 158 ± 45 | 60.9 ± 3.9 | 83 |
| P4 | DMSO/CHCl3 (1:2) | DABCOd | 35 | 112.5 | 1052.5 ± 74.2 | 138 ± 87 | 65.5 ± 8.3 | 84 |
| Nylon 6 | Commercial sample | 229.6 ± 53.6 | 337 ± 59 | 67.1 ± 3.9 | 45 | |||
| Nylon 6,6 | Commercial sample | 1249.3 ± 64.3 | 441 ± 11 | 87.1 ± 5.4 | 65 |
a%cis content determined by 1H NMR spectroscopic analysis.
bMw determined by SEC (DMF, 0.5% w/w NH4BF4) analysis against poly(methyl methacrylate) (PMMA) standards. Mechanical data (Ε, ε-break and UTS) calculated from n ≥ 3 samples. ± represents 1 s.d. Nylon 6,6 was averaged from n = 2 samples. Nylon 6 and Nylon 6,6 were commercial samples and are not soluble in the reported SEC solvent.
cReported from the DSC thermograms of 2nd heating cycle.
dIn total, 10 mol% (relative to monomer) was used.