Research Article
Characterization of Vietnamese Lacquer Collected in Different Seasons
Table 7
Data results of repeated kurome lacquers.
| | Water addition | Kneading time (min) | Water (%) | Viscosities (Pas) | MW distribution (%)1 | Drying time2 (h) | | Monomer | Oligomer | Polymer | DF | TF | HD |
| | None | 0 | 33.6 | 1.2 | 86.8 | 13.0 | 0.2 | 7.8 | 8.1 | 12.5 | | 60 | 5.2 | 6.6 | 50.2 | 47.5 | 2.3 | 3.0 | 3.6 | 8.3 | | 90 | 4.3 | 9.0 | 45.9 | 51.2 | 2.8 | 4.4 | 7.4 | 8.6 | | 120 | 4.1 | 10.8 | 45.3 | 51.7 | 3.0 | 4.4 | 5.3 | 8.6 | | 180 | 4.4 | 10.6 | 45.0 | 51.6 | 3.3 | | | |
| | 5%/30 min | 60 | 7.1 | 6.1 | 49.3 | 48.0 | 2.7 | 2.9 | 3.3 | 8.3 | | 90 | 4.5 | 7.8 | 44.6 | 52.4 | 3.1 | 3.4 | 3.8 | 5.3 | | 120 | 5.1 | 8.4 | 43.5 | 53.2 | 3.3 | 3.5 | 3.9 | 7.7 | | 180 | 3.7 | 12.6 | 39.5 | 56.3 | 4.1 | | | |
| | 10%/30 min | 60 | 7.8 | 4.2 | 56.1 | 41.2 | 2.7 | 3.4 | 4.2 | 8.6 | | 90 | 5.9 | 6.3 | 47.1 | 49.3 | 3.6 | 3.8 | 4.3 | 8.3 | | 120 | 4.1 | 10.9 | 40.6 | 54.6 | 4.7 | 3.3 | 3.6 | 7.5 | | 180 | 3.8 | 22.4 | 35.9 | 58.2 | 5.9 | | | |
| | 20%/30 min | 60 | 7.3 | 5.8 | 48.2 | 47.5 | 4.2 | 3.2 | 4.5 | 8.3 | | 90 | 5.5 | 11.2 | 39.6 | 54.8 | 5.6 | 5.5 | 6.4 | 9.0 | | 120 | 9.5 | 23.4 | 33.1 | 58.2 | 8.7 | 2.6 | 3.4 | 6.0 | | 150 | 12.3 | 43.5 | 30.5 | 59.4 | 10.1 | | | |
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1Determined by GPC. Monomer: MW = 320; oligomer: 10000 > MW > 600; polymer: MW > 10000.
2Drying condition: 25°C, 80%RH, and wet thickness 76 μm. DF: dust-free dry; TF: touch-free dry; HD: hard dry.
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