Table 1.
Changes of VOCs of neat polypropylene (PP) resins during the accelerated photoaging monitored by Headspace extraction-Gas Chromatography/Mass Spectroscopy (HS-GC/MS).
| No | Retention Time (min) | Molecular Formula | Compounds Name | CAS Number | Peak Area (×105) PPH-Y24 |
Peak Area (×105) K9026 |
Peak Area (×105) K7726H |
||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 0 h | 200 h | 580 h | 1000 h | 2000 h | 0 h | 200 h | 580 h | 1000 h | 2000 h | 0 h | 200 h | 580 h | 1000 h | 2000 h | |||||
| 1 | 2.07 | C4H8 | Butene | 25167–67–3 | / | 0.20 ± 0.01 | 0.30 ± 0.02 | 0.84 ± 0.03 | 26.17 ± 1.44 | 0.93 ± 0.04 | 5.49 ± 0.21 | 20.31 ± 1.05 | 89.49 ± 4.07 | 315.61 ± 7.25 | 4.03 ± 0.23 | 3.09 ± 0.11 | 6.91 ± 0.33 | 11.77 ± 0.44 | 101.38 ± 5.00 |
| 2 | 2.12 | C5H12 | Isopentane | 78–78–4 | 0.10 ± 0.00 | 0.63 ± 0.03 | 1.02 ± 0.06 | 4.57 ± 0.25 | 23.86 ± 1.31 | 13.86 ± 0.72 | 50.01 ± 2.14 | 135.00 ± 6.55 | 186.75 ± 9.85 | 137.42 ± 6.01 | 21.16 ± 1.23 | 28.96 ± 1.54 | 62.00 ± 3.23 | 71.97 ± 3.21 | 58.61 ± 2.32 |
| 3 | 2.23 | C6H14 | 2-Methylpentane | 107–83–5 | 0.77 ± 0.02 | 0.77 ± 0.03 | 0.47 ± 0.02 | 0.79 ± 0.02 | 1.30 ± 0.08 | 64.59 ± 3.25 | 67.17 ± 3.41 | 65.88 ± 3.02 | 68.25 ± 3.54 | 76.47 ± 3.52 | 104.28 ± 5.54 | 102.73 ± 5.26 | 103.38 ± 5.12 | 103.15 ± 5.11 | 103.53 ± 5.02 |
| 4 | 2.29 | C6H14 | Hexane | 110–54–3 | / | / | / | / | / | / | / | / | / | / | 11.48 ± 0.55 | 11.05 ± 0.81 | 11.08 ± 0.35 | 10. 45 ± 0.42 | 15. 14 ± 0.49 |
| 5 | 2.43 | C6H12 | 2-methyl-1-pentene | 763–29–1 | / | 0.20 ± 0.01 | 0.19 ± 0.01 | 0.54 ± 0.04 | 1.13 ± 0.07 | 4.44 ± 0.28 | 5.37 ± 0.21 | 6.36 ± 0.22 | 6.78 ± 0.41 | 7.56 ± 0.32 | / | / | / | / | / |
| 6 | 2.65 | C2H4O | Acetaldehyde | 75–07–0 | 0.07 ± 0.00 | 1.41 ± 0.08 | 0.35 ± 0.03 | 0.85 ± 0.04 | 5.90 ± 0.33 | 3.90 ± 0.24 | 5.04 ± 0.30 | 5.94 ± 0.25 | 16.68 ± 0.48 | 24.84 ± 1.62 | 0.56 ± 0.02 | 0.93 ± 0.03 | 4.25 ± 0.27 | 5.87 ± 0.20 | 9.21 ± 0.62 |
| 7 | 3.31 | C9H20 | 2,4-dimethyl-heptane | 2213–23–2 | 6.61 ± 0.21 | 6.62 ± 0.28 | 6.11 ± 0.40 | 6.56 ± 0.32 | 8.61 ± 0.47 | 89.07 ± 4.55 | 89.61 ± 4.81 | 91.32 ± 4.01 | 96.12 ± 5.02 | 95.31 ± 5.02 | 36.23 ± 1.35 | 36.21 ± 1.99 | 36.71 ± 1.87 | 35.04 ± 1.55 | 38.65 ± 1.58 |
| 8 | 3.54 | C3H6O | Acetone | 67–64–1 | / | 0.25 ± 0.01 | 0.38 ± 0.02 | 1.16 ± 0.07 | 64.93 ± 3.33 | 4.53 ± 0.28 | 15.27 ± 0.74 | 39.39 ± 1.29 | 172.98 ± 8.78 | 678.36 ± 36.01 | / | 0.70 ± 0.07 | 6.24 ± 0.40 | 34.28 ± 1.44 | 216.33 ± 11.81 |
| 9 | 3.86 | C9H20 | 4-Methyloctane | 2216–34–4 | 2.36 ± 0.18 | 2.33 ± 0.15 | 2.25 ± 0.12 | 2.28 ± 0.14 | 2.40 ± 0.14 | 11.55 ± 0.51 | 11.58 ± 0.55 | 11.34 ± 0.39 | 12.09 ± 0.44 | 11.55 ± 0.49 | 11.83 ± 0.55 | 11.85 ± 0.66 | 11.98 ± 0.71 | 11.19 ± 0.51 | 11.99 ± 0.55 |
| 10 | 4.22 | C9H18 | 2,4-Dimethyl-1-heptene | 19549–87–2 | 0.20 ± 0.01 | 0.20 ± 0.01 | / | 0.19 ± 0.01 | 0.41 ± 0.04 | 18.84 ± 0.97 | 19.68 ± 0.94 | 19.05 ± 0.88 | 15.33 ± 0.62 | 6.69 ± 0.28 | 1.18 ± 0.04 | 1.16 ± 0.05 | 1.10 ± 0.04 | 0.96 ± 0.04 | 0.89 ± 0.03 |
| 11 | 4.52 | C4H9OH | tert-Butanol | 75–65–0 | / | 0.25 ± 0.01 | 0.49 ± 0.02 | 2.22 ± 0.12 | 16.05 ± 0.92 | 71.97 ± 3.66 | 108.03 ± 5.01 | 153.54 ± 7.04 | 216.39 ± 11.02 | 272.22 ± 12.25 | / | 3.86 ± 0.12 | 17.89 ± 0.78 | 29.38 ± 1.36 | 49.08 ± 2.57 |
| 12 | 5.09 | C2H5OH | Ethanol | 64–17–5 | / | / | / | / | / | 1.48 ± 0.05 | 1.55 ± 0.06 | 1.61 ± 0.05 | 1.53 ± 0.05 | 1.55 ± 0.08 | 2.86 ± 0.12 | 2.87 ± 0.14 | 2.95 ± 0.14 | 2.97 ± 0.10 | 2.94 ± 0.12 |
| 13 | 6.38 | C12H26 | / | / | 7.99 ± 0.42 | 8.32 ± 0.41 | 8.17 ± 0.44 | 8.09 ± 0.47 | 8.16 ± 0.47 | 21.4 ± 1.62 | 21.09 ± 1.00 | 21.09 ± 1.02 | 21.63 ± 1.07 | 20.82 ± 1.12 | 7.42 ± 0.41 | 7.47 ± 0.33 | 7.55 ± 0.28 | 6.81 ± 0.25 | 6.97 ± 0.41 |
| 14 | 6.46 | C12H26 | / | / | 3.40 ± 0.11 | 3.43 ± 0.01 | 3.94 ± 0.21 | 3.36 ± 0.14 | 3.83 ± 0.23 | 2.70 ± 0.14 | 2.70 ± 0.12 | 2.64 ± 0.10 | 3.84 ± 0.21 | 5.61 ± 0.26 | 1.73 ± 0.08 | 1.75 ± 0.08 | 1.98 ± 0.12 | 2.04 ± 0.09 | 2.93 ± 0.14 |
| 15 | 7.24 | C12H26 | / | / | 4.03 ± 0.10 | 4.04 ± 0.20 | 4.55 ± 0.25 | 3.90 ± 0.23 | 1.79 ± 0.07 | 4.38 ± 0.20 | 4.32 ± 0.25 | 4.47 ± 0.20 | 1.23 ± 0.05 | 1.50 ± 0.04 | 4.20 ± 0.24 | 4.21 ± 0.22 | 4.22 ± 0.22 | 3.97 ± 0.21 | 1.28 ± 0.05 |
| 16 | 7.35 | C12H26 | / | / | 1.74 ± 0.08 | 1.75 ± 0.18 | 2.01 ± 0.12 | 1.69 ± 0.04 | 1.79 ± 0.06 | 1.08 ± 0.04 | 1.11 ± 0.05 | 0.99 ± 0.04 | 4.59 ± 0.14 | 2.94 ± 0.16 | 0.97 ± 0.08 | 0.99 ± 0.04 | 0.99 ± 0.04 | 0.95 ± 0.04 | 0.16 ± 0.01 |
| 17 | 8.37 | C4H10O | 1-Butanol | 71–36–3 | / | / | / | / | 4.50 ± 0.24 | 0.33 ± 0.01 | 0.30 ± 0.04 | 0.33 ± 0.01 | 3.54 ± 0.19 | 8.61 ± 0.65 | 1.91 ± 0.14 | 1.89 ± 0.07 | 1.51 ± 0.07 | 1.87 ± 0.07 | 4.40 ± 0.22 |
| 18 | 9.49 | C15H32 | / | / | 3.72 ± 0.17 | 3.75 ± 0.22 | 4.27 ± 0.21 | 3.58 ± 0.11 | 3.51 ± 0.15 | 6.39 ± 0.34 | 6.36 ± 0.33 | 6.45 ± 0.19 | 6.69 ± 0.42 | 5.49 ± 0.21 | 2.14 ± 0.12 | 2.14 ± 0.14 | 2.13 ± 0.18 | 2.01 ± 0.12 | 1.75 ± 0.07 |
| 19 | 9.57 | C5H8O2 | 2,4-Pentanedione | 123–54–6 | / | / | / | / | 15.24 ± 0.74 | / | / | / | / | / | / | / | / | / | / |
| 20 | 10.27 | C15H32 | / | / | 1.68 ± 0.07 | 1.70 ± 0.14 | 1.96 ± 0.14 | 1.63 ± 0.07 | 1.78 ± 0.08 | 1.44 ± 0.08 | 1.44 ± 0.08 | 1.44 ± 0.05 | 1.65 ± 0.05 | 1.71 ± 0.07 | 1.22 ± 0.07 | 1.22 ± 0.08 | 0.16 ± 0.01 | 1.18 ± 0.05 | 1.28 ± 0.05 |
| 21 | 11.99 | C18H38 | / | / | 1.33 ± 0.05 | 1.33 ± 0.08 | 1.52 ± 0.14 | 1.26 ± 0.09 | 1.34 ± 0.09 | 2.25 ± 0.10 | 2.25 ± 0.12 | 2.13 ± 0.14 | 2.34 ± 0.14 | 2.64 ± 0.11 | 0.66 ± 0.04 | 0.67 ± 0.04 | 0.64 ± 0.05 | 0.62 ± 0.08 | 0.69 ± 0.02 |
| 22 | 12.64 | CH3COOH | Acetic acid | 64–19–7 | 0.60 ± 0.04 | 0.58 ± 0.05 | 0.62 ± 0.03 | 0.55 ± 0.04 | 119.44 ± 5.77 | 0.45 ± 0.03 | 0.42 ± 0.01 | 1.53 ± 0.07 | 93.63 ± 3.58 | 626.94 ± 32.01 | 0.38 ± 0.02 | 0.38 ± 0.03 | 0.38 ± 0.01 | 0.41 ± 0.01 | 249.38 ± 12.08 |