Research Article
Round Robin Tests to Determine Fiber Content of Carbon Fiber-Reinforced Thermoplastic Composites by Combustion and Thermogravimetry
Table 4
Calculated fiber content of CFRTP with 10 plies after resin removal by combustion according to ISO 14127.
| | Organization | Number of specimens | Initial weight (g) | Weight with wire (g) | Weight after combustion (g) | Fiber content in weight (%) | | Average | Standard deviation | Average | Standard deviation | Average | Standard deviation | Average | Standard deviation |
| | A | 5 | 0.30292 | 0.00241 | 0.33904 | 0.00413 | 0.23184 | 0.00387 | 64.613 | 0.401 | | B | 5 | 0.29838 | 0.00526 | 0.32828 | 0.00524 | 0.22596 | 0.00248 | 65.714 | 0.401 | | C | 3 | 0.29683 | 0.00175 | 0.32607 | 0.00454 | 0.22317 | 0.00443 | 65.334 | 0.051 | | D | 3 | 0.30323 | 0.00445 | 0.83727 | 0.08050 | 0.73040 | 0.08264 | 64.769 | 1.263 | | E | 3 | 0.30830 | 0.00963 | 0.37602 | 0.00851 | 0.26972 | 0.00370 | 65.537 | 0.505 | | F | 5 | 0.30240 | 0.00367 | 0.32672 | 0.00502 | 0.22382 | 0.00204 | 65.981 | 0.804 | | G | 5 | 0.30097 | 0.00394 | 0.36073 | 0.00414 | 0.25585 | 0.00141 | 65.161 | 0.567 | | H | 5 | 0.30124 | 0.00359 | 0.34034 | 0.00349 | 0.23640 | 0.00124 | 65.502 | 0.605 |
| | Total | 34 | 0.30161 | 0.00542 | 0.38511 | 0.14359 | 0.28057 | 0.14284 | 65.346 | 0.779 |
| | Interlaboratory | 8 | 0.302 | 0.003 | 0.404 | 0.164 | 0.300 | 0.164 | 65.326 | 0.433 |
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