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. 2021 Mar 23;13(6):985. doi: 10.3390/polym13060985

Table 3.

Design matrix.

Sample	Coded Factor		Uncoded Factor
Sample	V₁	V₂	V₁	V₂
S1	2	0	0.85	0.55
S2	0	−2	0.65	0.25
S3	0	0	0.65	0.55
S4	1	−1	0.75	0.40
S5	0	0	0.65	0.55
S6	0	0	0.65	0.55
S7	0	0	0.65	0.55
S8	−2	0	0.45	0.55
S9	0	0	0.65	0.55
S10	0	−2	0.65	0.25
S11	0	0	0.65	0.55
S12	2	0	0.85	0.55
S13	−2	0	0.45	0.55
S14	0	0	0.65	0.55
S15	1	1	0.75	0.70
S16	−1	1	0.55	0.70
S17	0	2	0.65	0.85
S18	1	1	0.75	0.70
S19	−1	1	0.55	0.70
S20	0	0	0.65	0.55
S21	−1	−1	0.55	0.40
S22	1	−1	0.75	0.40
S23	0	2	0.65	0.85
S24	−1	−1	0.55	0.40