Table I. Degree of Conversion Values and Curing Time of Adhesive Resins Containing Different Photoinitiator Systems and Different Water Content.
| Samples | Photoinitiator systema | Water content (%) | DC (%)b | CT (sec)c |
|---|---|---|---|---|
| CD-0 | CQ/DMAEMA | 0 | 74.7 (0.4) | 33 (0.7) |
| CD-8 | CQ/DMAEMA | 8 | 37.9 (3.4) | n/ad |
| CD-16 | CQ/DMAEMA | 16 | 37.8 (1.3) | n/a |
| CE-0 | CQ/ EDMAB | 0 | 84.9 (0.6) | 9 (0.5) |
| CE-8 | CQ/ EDMAB | 8 | 85.2 (0.4) | 19 (0.5) |
| CE-16 | CQ/ EDMAB | 16 | 89.7 (0.2) | 18 (0.5) |
| CDD-0 | CQ/DMAEMA/DPIHP | 0 | 88.0 (0.6) | 7 (0.4) |
| CDD-8 | CQ/DMAEMA/DPIHP | 8 | 93.9 (0.7) | 5 (0.4) |
| CDD-16 | CQ/DMAEMA/DPIHP | 16 | 95.7 (0.5) | 7 (0.4) |
| CED-0 | CQ/ EDMAB/DPIHP | 0 | 92.4 (1.4) | 5 (0.4) |
| CED-8 | CQ/ EDMAB/DPIHP | 8 | 97.2 (0.4) | 5 (0.4) |
| CED-16 | CQ/ EDMAB/DPIHP | 16 | 97.3 (0.7) | 5 (0.4) |
a
Abbreviations: CQ = Camphorquinone; DMAEMA = 2-(dimethylamino)ethyl methacrylate; EDMAB = ethyl-4-(dimethylamino) benzoate; DPIHP = diphenyliodonium hexafluorophosphate.
b
DC was determined by by using a LabRAM ARAMIS Raman spectrometer.
c
The curing time was taken as the period from which the light exposure was initiated to the moment at which the metal rod could not be moved by hand. The data are presented as mean values with standard deviations in parentheses, and the number of specimens tested for DC and CT is 4.
d
CT could not be measured because the cured polymer was gel-like due to its low DC.