Table 2 Typical gelation rates, swelling rates, and tensile test results of the thick PDMS films crosslinked by photopolymerization
Cross-linking conditions | Geration rates (wt%) | Swelling rate (wt%) with THF | Tensile test | |||
|---|---|---|---|---|---|---|
young’s modulus (Mpa) | breaking point (Mpa) | rupture strain (%) | ||||
End-epoxy-PDMS 20 K,64% | 3.5 h UV lamp Irradiation(14.0 W/cm²) | ‒ | 920 | 0.013 | 0.029 | 430 |
and 80 °C curing in 5 h | ||||||
End-epoxy-PDMS 20 K,77% | 15 min. UV-LED Irradiation | ‒ | 720 | ‒ | ‒ | ‒ |
and 50 °C curing in 2 h | ||||||
End-epoxy-PDMS 20 K,100% | 15 min. UV-LED Irradiation | 82.4 | 560 | 0.19 | 0.41 | 280 |
and 50 °C curing in 2 h | ||||||
End-epoxy-PDMS 20 K,100% | 3 min. UV-LED Irradiation | ‒ | 430 | 0.35 | 0.52 | 240 |
and 150 °C curing in 40 min. | ||||||
End-epoxy-PDMS 30 K,100% | 15 min. UV-LED Irradiation | ‒ | 680 | 0.066 | 0.15 | 330 |
and 50 °C curing in 2 h | ||||||
Side-epoxy-PDMS 10 K,10% | 15 min. UV-LED Irradiation | ‒ | 130 | ‒ | ‒ | ‒ |
and 50 °C curing in 2 h | ||||||
Side-epoxy-PDMS 30 K,37% | 15 min. UV-LED Irradiation | ‒ | 120 | ‒ | ‒ | ‒ |
and 50 °C curing in 2 h |
