Table 3.

The amounts of DR1 dye isomeric species and their ratios calculated from fitted double peaks before and after plasma treatment at different modification time intervals for dye-doped polyamide 6 with extra surface dye.

Samples	Strans	Scis	Scis/Strans	Scis/Stotal(%)
Before plasma treatment	38.02	4.06	0.10	9.64
10 min plasma treatment	26.31	16.74	0.63	38.88
14 min plasma treatment	23.40	16.35	0.69	41.13
18 min plasma treatment	21.81	17.24	0.79	44.14
22 min plasma treatment	20.15	17.57	0.87	46.58

S_trans area under the fitted peak 1, S_cis area under the right fitted peak 2, S_total area under the cumulative fit peak.