Round Robin Tests to Determine Fiber Content of Carbon Fiber-Reinforced Thermoplastic Composites by Combustion and Thermogravimetry

Table 3

Calculated fiber content of CFRTP with 8 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	0.35274	0.01479	0.38692	0.01850	0.22674	0.00457	54.685	2.435
B	5	0.35354	0.01429	0.38440	0.01455	0.22830	0.00572	55.886	1.243
C	3	0.35743	0.00507	0.38793	0.00332	0.22593	0.00222	54.686	0.645
D	3	0.35775	0.00791	0.60993	0.04229	0.46050	0.05405	58.208	3.702
E	3	0.35626	0.00470	0.42498	0.00103	0.26643	0.00801	55.513	1.430
F	5	0.35676	0.01331	0.37982	0.01377	0.22636	0.00217	57.066	2.264
G	5	0.35988	0.00887	0.39906	0.00860	0.23804	0.00247	55.279	1.009
H	5	0.36188	0.00611	0.41857	0.00363	0.25367	0.00384	54.440	0.578
Total	34	0.35701	0.01115	0.41507	0.06467	0.25659	0.06686	55.647	2.194
Interlaboratory	8	0.357	0.003	0.424	0.072	0.266	0.075	55.720	1.227