The fitting slope, correlation coefficient and activation energy of different degradation rates.

α	TSPLA			TSPLA–5%DOPO
	k	R	E (kJ mol−1)	k	R	E (kJ mol−1)
0.1	−4.229	0.983	76.9869	−5.368	0.987	97.727
0.2	−5.890	0.997	107.225	−7.243	0.998	131.861
0.3	−6.220	0.998	113.232	−8.049	0.999	146.536
0.4	−6.489	0.996	118.129	−8.507	0.999	154.869
0.5	−6.703	0.993	122.025	−9.008	0.999	163.981
0.6	−7.133	0.985	129.853	−8.918	0.998	162.355
0.7	−8.538	0.954	155.43	−12.132	0.999	220.860
0.8	−10.67	0.977	194.242	−13.638	0.999	248.272
0.9	−10.72	0.996	195.152	−13.008	0.987	236.811
AVG	−7.525	0.987	137.002	−9.415	0.996	171.392