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	—	—