Effects of Adding Multiwall Carbon Nanotubes on Performance of Polyvinyl Acetate and Urea-Formaldehyde Adhesives in Tropical Timber Species

Table 3

Values of entropy factor, activation energy, degree of the function of decomposition, and correlation coefficient of kinetics of decomposition of PVAc and UF adhesives adding different concentrations of MWCNTs-OH.

Adhesive	Reaction	MWCNTs concentration (%)	Entropy factor ( in S^−1)	Activation energy ( in kJ mol^−1)	Degree of the function of decomposition ()	Correlation coefficient ()
PVAc	First	0.00; 0.05; 0.10	4.33 × 10^15; 5.35 × 10^16; 6.53 × 10^18	189.34; 204.67; 227.28	2.0; 2.1; 2.3	0.77; 0.83; 0.82
	Second	0.00; 0.05; 0.10	6.76 × 10^37; 4.38 × 10^20; 6.69 × 10^23	403.94; 232.27; 323.01	4.6; 2.3; 2.9	0.75; 0.83; 0.71
UF		0.00; 0.05; 0.10	2.03 × 10^23; 2.72 × 10^33; 1.01 × 10^41	237.6; 333.16; 414.63	6.83; 9.7; 10.8	0.98; 0.95; 0.96