Research Article
Investigation of Cure Reaction, Rheology, Volume Shrinkage and Thermomechanical Properties of Nano-TiO2 Filled Epoxy/DDS Composites
Table 4
Gelation and vitrification times for the TiO2/epoxy composites.
| (°C) | Gelation time (sec) of the epoxy phase | Average of all the three parameters (s) | Vitrification time (sec) of the epoxy phase | () (s) | tan Max (s) | (s) | tan (s) | Max (s) |
| Neat epoxy | 150 | 4015 | 3580 | 3568 | 3721 | 4653 | 4853 | 165 | 2266 | 2048 | 2139 | 2151 | 2476 | 2536 | 180 | 1146 | 1000 | 1147 | 1097 | 1571 | 1452 |
| 0.7 wt% TiO2 composites | 150 | 3939 | 3534 | 3470 | 3648 | 4415 | 4475 | 165 | 2174 | 2008 | 1992 | 2058 | 2295 | 2295 | 180 | 1145 | 1024 | 1066 | 1078 | 1265 | 1323 |
| 3.6 wt% TiO2 composites | 150 | 3906 | 3587 | 3397 | 3630 | 4235 | 4186 | 165 | 2137 | 1986 | 1943 | 2022 | 2415 | 2475 | 180 | 1101 | 1000 | 1039 | 1047 | 1211 | 1271 |
| 6.9 wt% TiO2 composites | 150 | 3954 | 3558 | 3328 | 3613 | 4355 | 4417 | 165 | 2115 | 1941 | 1905 | 1987 | 2356 | 2356 | 180 | 1057 | 952 | 1021 | 1010 | 1144 | 1205 |
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