Preparation, Characterization, and Thermal Degradation Studies of p-Nitrophenol-Based Copolymer

Table 4

Thermoanalytical data for each degradation step of p-NP-4,4^′-MDA-F copolymer.

Kinetic equations	Decomposition steps
	I			II			III
	𝐸𝑎	𝑛	ln(𝑧)	𝐸𝑎	𝑛	ln(𝑧)	𝐸𝑎	𝑛	ln(𝑧)
Friedman	57.37	0.6	2.21	32.64	3.5	12.64	33.80	2.4	12.62
Chang	57.26	0.6	2.22	33.32	3.2	13.35	34.39	2.4	12.69
Sharp-Wentworth	24.92	1.0	9.15	8.71	1.0	4.92	14.66	1.0	5.47
Freeman-Carroll	25.39	0.3	9.08	7.80	1.4	4.20	14.21	1.4	5.15
Coat-Redfern	14.88	0.9	11.65	18.30	0.9	12.14	25.87	0.9	12.89