Research Article
Round Robin Tests to Determine Fiber Content of Carbon Fiber-Reinforced Thermoplastic Composites by Combustion and Thermogravimetry
Table 6
Calculated fiber content of CFRTP with 8 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 | 9.8497 | 0.5285 | 5.7557 | 0.2923 | 0.0473 | 0.0523 | 57.950 | 0.791 | SII | TG/DTA 6200 | | B | 1 | 8.6630 | — | 5.1450 | — | 0.0070 | — | 59.310 | — | Hitachi High-Technology GLOBAL | STA 7300 | | C | 3 | 5.4043 | 0.2966 | 3.0817 | 0.3334 | 0.0467 | 0.0471 | 56.021 | 2.503 | Rigaku Corporation | TG 8120 | | D | 3 | 20.0333 | 0.0471 | 11.3371 | 0.0882 | 0.0000 | 0.0000 | 56.591 | 0.446 | ULVAC RIKO Inc. | TGD-9600 | | E | 3 | 9.8533 | 0.0170 | 5.3947 | 0.1850 | 0.0083 | 0.0306 | 54.667 | 2.107 | Rigaku Corporation | TG-DTA |
| | Total | 16 | 10.8521 | 4.7281 | 6.1950 | 2.6641 | 0.0285 | 0.0455 | 56.803 | 2.036 | — | — |
| | Interlaboratory | 5 | 10.761 | 4.914 | 6.143 | 2.759 | 0.022 | 0.021 | 56.908 | 1.598 | — | — |
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