Preparation of Soy-Based Adhesive Enhanced by Waterborne Polyurethane: Optimization by Response Surface Methodology

Table 2

Experimental scheme and results.

Run number	WPU addition level (X1, %)	Reaction temperature (X2, °C)	Reaction time (X3, min)	Wet shear strength (Y, MPa)
1	10.00	80.00	120.00	0.97
2	8.00	70.00	80.00	1.03
3	10.00	60.00	120.00	1.02
4	10.00	70.00	100.00	1.18
5	10.00	70.00	100.00	1.13
6	12.00	70.00	80.00	1.06
7	8.00	80.00	100.00	0.98
8	10.00	70.00	100.00	1.14
9	8.00	60.00	100.00	1.09
10	10.00	70.00	100.00	1.12
11	12.00	70.00	120.00	1.12
12	12.00	60.00	100.00	0.97
13	12.00	80.00	100.00	1.14
14	8.00	70.00	120.00	0.93
15	10.00	60.00	80.00	1
16	10.00	70.00	100.00	1.13
17	10.00	80.00	80.00	1.05