Property Optimisation of EPDM Rubber Composites Using Mathematical and Statistical Strategies

Table 6

Composition (weight fraction) of the check-point mixtures F₁, F₂, and F₃ and corresponding measured (M) and predicted (P) values of hardness (HD), tensile strength (TS), elongation at break (EB), and rebound resilience (RS).

Wt. fraction	F1		F2		F3
X1 (CC)	0.303		0.677		0.860
X2 (PO)	0.438		0.616		0.755
X3 (DV)	0.008		0.015		0.009
Property	P	M	P	M	P	M
HD (Shore A)	68.5	69.8 ± 0.7	76.2	78.4 ± 0.7	69.5	70.6 ± 0.7
RS (%)	26.5	27.0 ± 0.0	25.0	25.0 ± 0.0	24.3	24.0 ± 0.0
EB (%)	585.3	668.3 ± 9.8	470.5	522.0 ± 19.2	551.0	526.7 ± 12.1
TR (MPa)	10.47	10.10 ± 0.3	8.92	9.32 ± 0.3	7.65	7.43 ± 0.2