Table 1.
Summary of DMA Results for a Series of Azide Monomers (AZ-(1–4)) with a Single Alkyne Monomer (AL-1) Composed 2 mol % CuCl2[PMDETA] and 4 mol % DMPA and Cured with 10 mW/Cm2 UV Lighta
| azide monomer | alkyne cross-linker (AL-1)
|
|||
|---|---|---|---|---|
| AZ-1 | AZ-2 | AZ-3 | AZ-4 | |
| Tg (°C) | 57 | 67 | 73 | 81 |
| E30 °C (GPa) | 1.7 | 2.2 | 1.1 | 1.4 |
| E at Tg + 40 °C (MPa) | 3.9 | 3.4 | 1.8 | 2.1 |
| ρ (g/cm3) | ~1.1 | ~1.2 | ~1.1 | ~1.1 |
| Mc (g/mol) | ~1200 | ~1500 | ~2600 | ~2300 |
a
ρ is the density of the material estimated from the dimension and mass of the sample; Mc is the molecular weight between cross-links calculated from the equation MC = 3ρRT/2E where R is the gas constant.