Research Article
Response Surface Methodology for the Optimization of Preparation of Biocomposites Based on Poly(lactic acid) and Durian Peel Cellulose
Table 3
The responses of the parameters used in central composite design.
| Trial | Independent variables | Responses | Cellulose loading (%) | Temperature (°C) | Time (min) | Tensile strength (MPa) | Impact strength (kJ/m2) |
| 1 | 25 | 165 | 15 | 40.735 ± 1.184 | 2.519 ± 0.510 | 2 | 25 | 165 | 25 | 33.318 ± 0.817 | 2.010 ± 0.122 | 3 | 25 | 175 | 15 | 39.762 ± 1.092 | 2.290 ± 0.310 | 4 | 25 | 175 | 25 | 28.707 ± 1.231 | 2.025 ± 0.248 | 5 | 35 | 165 | 15 | 48.010 ± 1.208 | 2.876 ± 0.356 | 6 | 35 | 165 | 25 | 47.556 ± 1.669 | 2.851 ± 0.227 | 7 | 35 | 175 | 15 | 40.174 ± 0.663 | 2.445 ± 0.131 | 8 | 35 | 175 | 25 | 36.800 ± 1.380 | 2.019 ± 0.538 | 9 | 21.6 | 170 | 20 | 33.615 ± 1.461 | 1.922 ± 0.171 | 10 | 38.4 | 170 | 20 | 46.114 ± 0.956 | 2.944 ± 0.341 | 11 | 30 | 161.6 | 20 | 41.067 ± 1.901 | 2.464 ± 0.297 | 12 | 30 | 178.4 | 20 | 31.662 ± 1.146 | 2.241 ± 0.540 | 13 | 30 | 170 | 11.6 | 35.793 ± 1.076 | 2.493 ± 0.196 | 14 | 30 | 170 | 28.4 | 31.984 ± 1.048 | 2.250 ± 0.289 | 15 | 30 | 170 | 20 | 29.920 ± 2.051 | 2.053 ± 0.210 | 16 | 30 | 170 | 20 | 30.658 ± 1.483 | 1.952 ± 0.252 | 17 | 30 | 170 | 20 | 31.150 ± 1.286 | 1.930 ± 0.250 | 18 | 30 | 170 | 20 | 30.549 ± 0.845 | 1.993 ± 0.165 | 19 | 30 | 170 | 20 | 29.666 ± 1.615 | 2.028 ± 0.153 | 20 | 30 | 170 | 20 | 31.192 ± 1.501 | 2.094 ± 0.203 |
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