A Study on the Influence of Hot Press Forming Process Parameters on Flexural Property of Glass/PP Based Thermoplastic Composites Using Box-Behnken Experimental Design

Table 4

ANOVA for response surface quadratic model of flexural strength.

Source	Sum of squares	Df	Mean square	𝐹 value	𝑃 value prob.>𝐹
Model	2228.03	9	247.56	11.72	0.0072
X1-pressure	323.22	1	323.22	15.30	0.0113
X2-temp.	117.73	1	117.73	5.57	0.0647
X3-time	60.50	1	60.50	2.86	0.1514
X1X2	96.63	1	96.63	4.57	0.0855
X1X3	4.77	1	4.77	0.23	0.6545
X2X3	176.23	1	176.23	8.34	0.0343
X1^2	449.01	1	449.01	21.25	0.0058
X2^2	408.05	1	408.05	19.32	0.0071
X3^2	518.05	1	518.05	24.52	0.0043
Residual	105.62	5	24.52
Lack of fit	105.62	3	21.12
Pure error	0.000	2	35.21
Cor. total	2333.65	14	0.000