Research Article
Characterization of Vietnamese Lacquer Collected in Different Seasons
Table 5
Data results of kneaded lacquers.
| | Kneading speed (rpm) | Kneading time (min) | Water (%) | Viscosities (mPas) | MW distribution (%)1 | Drying time2 (h) | | Monomer | Oligomer | Polymer | DF | TF | HD |
| | — | — | 35.4 | 1203 | 86.8 | 13.0 | 0.2 | 7.8 | 8.1 | 12.5 |
| | 60 | 15 | 26.4 | 1400 | 73.8 | 25.6 | 0.6 | 12.2 | 13.8 | 31.5 | | 60 | 30 | 20.4 | 2442 | 56.5 | 41.8 | 1.7 | 6.6 | 7.2 | 11.8 | | 60 | 45 | 13.6 | 2694 | 50.1 | 48.1 | 1.8 | 2.8 | 3.3 | 5.5 | | 60 | 60 | 12.5 | 4639 | 44.8 | 52.8 | 2.4 | 2.2 | 2.7 | 5.2 |
| | 120 | 15 | 27.1 | 3192 | 66.9 | 32.6 | 0.5 | 15.8 | 19.0 | 96 | | 120 | 30 | 16.6 | 2747 | 54.1 | 45.0 | 1.0 | 3.8 | 4.5 | 7.5 | | 120 | 45 | 8.1 | 3558 | 51.3 | 45.3 | 1.6 | 3.0 | 3.4 | 4.5 | | 120 | 60 | 5.2 | 3625 | 50.2 | 47.4 | 2.4 | 3.4 | 3.8 | 6.0 |
| | 180 | 15 | 21.5 | 1936 | 67.4 | 32.0 | 0.6 | 16.2 | 18.5 | 72 | | 180 | 30 | 9.0 | 2250 | 56.1 | 42.7 | 1.1 | 1.7 | 2.8 | 6.0 | | 180 | 45 | 5.2 | 2389 | 55.7 | 42.7 | 1.6 | 3.3 | 3.6 | 7.0 | | 180 | 60 | 4.3 | 3322 | 52.3 | 45.8 | 1.9 | 3.1 | 3.7 | 6.0 |
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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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