Response Surface Methodology for the Optimization of Preparation of Biocomposites Based on Poly(lactic acid) and Durian Peel Cellulose

Table 6

Regression coefficients and probability values of approximate polynomials for response variables in experimental design.

Term	Tensile strength		Impact strength
	Coefficient	Probability	Coefficient	Probability
Constant	30.45	—	2.01	—
: cellulose	3.74	<0.0001	0.22	0.0002
: temperature		<0.0001		0.0041
: time		0.0009		0.0148
	3.79	<0.0001	0.15	0.0029
	2.55	0.0002	0.12	0.0103
	1.68	0.0036	0.12	0.0076
		0.0209		0.0382
	1.83	0.0116	0.029	0.5752
		0.1975		0.5538