Research Article
Round Robin Tests to Determine Fiber Content of Carbon Fiber-Reinforced Thermoplastic Composites by Combustion and Thermogravimetry
Table 7
Calculated fiber content of CFRTP with 10 plies after resin removal by thermogravimetry.
| Organization | Number of specimens | Initial weight (mg) | Weight after step 3 (mg) | Weight after step 5 combustion (g) | Fiber content in weight (%) | Apparatus | Average | Standard deviation | Average | Standard deviation | Average | Standard deviation | Average | Standard deviation | Company | Code |
| A | 6 | 10.1542 | 0.5521 | 6.6879 | 0.3771 | 0.0578 | 0.0387 | 65.300 | 1.178 | SII | TG/DTA 6200 | B | 1 | 8.1630 | — | 5.2910 | — | 0.0910 | — | 63.702 | — | Hitachi High-Technology GLOBAL | STA 7300 | C | 3 | 5.1037 | 0.0648 | 3.3803 | 0.0370 | 0.1070 | 0.0489 | 64.167 | 2.450 | Rigaku Corporation | TG 8120 | D | 3 | 19.7667 | 0.0471 | 12.9821 | 0.2116 | 0.0000 | 0.0000 | 65.677 | 1.054 | ULVAC RIKO Inc. | TGD-9600 | E | 3 | 10.1633 | 0.2311 | 6.6167 | 0.1563 | –0.0147 | 0.0284 | 65.246 | 0.781 | Rigaku Corporation | TG-DTA |
| Total | 16 | 10.8868 | 4.6845 | 7.1472 | 3.0754 | 0.0447 | 0.0559 | 65.048 | 1.527 | — | — |
| Interlaboratory | 5 | 10.670 | 4.910 | 6.992 | 3.227 | 0.048 | 0.048 | 64.819 | 0.751 | — | — |
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