Using Factorial Design Methodology to Assess PLA-g-Ma and Henequen Microfibrillated Cellulose Content on the Mechanical Properties of Poly(lactic acid) Composites

Table 3

Effects estimated using ANOVA.

Source	Mechanical properties				HDT	ImpactST
	Tensile mod.	Tensile st.	Flexural mod.	Flexural st.
	value	value	value	value	value	value
Model significance	<0.0001	<0.0001	0.0003	<0.0001	0.0052	<0.0001
Principal effects
MA	<0.0001	0.0001	0.2417	<0.0001	0.0008	0.0001
HENCEL	<0.0001	0.0023	<0.0001	<0.0001	0.4418	<0.0001
Interaction of main effects
MA-HENCEL	0.0100	<0.0001	<0.0074	<0.0001	0.3511	0.8649
-squared	0.9396	0.9928	0.8696	0.9647	0.8413	0.9673
Adj. -squared	0.9195	0.9905	0.8261	0.9530	0.7551	0.9564
Residual
Lack of fit	0.0569	0.0654	0.7040	0.0534	0.2201	0.0580
Observation	Not significant	Not significant	Not significant	Not significant	Not significant	Not significant