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Recent Advances in the Rigidization of Gossamer Structures 277
Fig. 11. Time-dependence of acrylate conversion as a function of curing temperature
for EPDA photopolymerization with 1 wt-% type I photo-initiator under filtered
light
Maximum conversion
Acrylate conversion
1
0,8
0,6
0,4
0,2
0
1
0,8
0,6
0,4
0,2
0
90°C
70 °C
50°C
30°C
10°C
0 200 400 600
Time of exposure (s)
0 40 80 120 160 200
Tpolym (°C)
Fig. 12. Dependence of ultimate conversion as a function of curing temperature
during isothermal EPDA photopolymerization
The determining influence of vitrification on the curing process is evidenced
in Fig. 13, where the Tg of the network in the photocured samples is
expressed as a function the curing temperature.