## 3 Results  
### Tensile Test  
Figure 2 details the mechanical properties of miniplates measured through tensile testing, organized by groups of injection molding temperature variations and material weight compositions. It provides a statistical analysis of the mechanical properties obtained from tensile testing of miniplates, including ultimate stress, elastic modulus and break elongation. The categorization is based on groups of injection molding temperature variations and material weight compositions. Figure 2a depicts that sample groups blending both sago starch and PEG in PLA material (SPLA20P10 and SPLA20P20) with varied injection temperatures generally exhibited lower ultimate stresses compared to the remaining sample groups, particularly distinct from the sample group without sago starch (SPLA0P10, ranging between 30.34 \(\pm\) 1.03 MPa to 38.00 \(\pm\) 3.02 Mpa). Most sample groups displayed a trend of significantly reducing ultimate stress with increasing injection mold temperature, such as SPLA0P10 from 38.00 \(\pm\) 3.02 Mpa at 160 \({}^{\circ}\)C to the lowest of 30.34 \(\pm\) 1.03 Mpa at 180 \({}^{\circ}\)C, SPLA20P0 from 39.37 \(\pm\) 1.40 at 150 \({}^{\circ}\)C to 25.96 \(\pm\) 1.57 Mpa at 180 \({}^{\circ}\)C and SPLA20P20 from the highest of 24.05 \(\pm\) 0.57 Mpa at 150 \({}^{\circ}\)C to 16.58 \(\pm\) 2.5 Mpa at 180 \({}^{\circ}\)C. The SPLA20P10 sample group, however, showed an increasing trend in ultimate stress over higher temperatures, although it was only significant below 160 \({}^{\circ}\)C of 22.93 \(\pm\) 1.34 Mpa. Figure 2b depicts that sample groups with PEG had lower elastic modulus, with the lowest of 0.8 \(\pm\) 0.06 Gpa at 180 \({}^{\circ}\)C in SPLA20P20, compared to the sample groups without PEG blend (SPLA20P0, ranging between 1.96 \(\pm\) 0.35 Gpa to 2.16 \(\pm\) 0.34 Gpa). Nevertheless, the overall trends were not statistically different, except for the comparison between SPLA20P0 and SPLA20P10, respectively, resulting 2.16 \(\pm\) 0.34 GPa and 1.28 \(\pm\) 0.34 GPa, at the 160 \({}^{\circ}\)C temperature. Additionally, SPLA20P0 samples at 180 \({}^{\circ}\)C showed a significant increase of 2.02 \(\pm\) 0.24 GPa compared to the remaining sample groups  
Figure 2: Mechanical properties, including (**a**) ultimate stress, (**b**) modulus of elasticity and (**c**) elongation at break of minipilates obtained from tensile testing, categorized by groups of injection molding temperature variations and material weight compositions (\(p\) < 0.05; \(n\) = 5; annotations (*) and (*) for material compositions and injection temperature effects, respectively). at similar temperature settings, as the highest of 1.3 \(\pm\) 0.32 GPa in the SPLA0P10 group. No significant differences were observed when comparing molding temperature variations within each sample group. Figure 2c presents the break elongation results, indicating that sample groups without PEG (SPLA20P0, ranging between 0.87 \(\pm\) 0.30% to 2.99 \(\pm\) 0.46%) had the lowest values compared to the remaining groups at each molding temperature. Sample groups with PEG blend showed incremental break elongations with increasing injection mold temperatures. Statistical significance was observed in SPLA010 from temperatures of 150 and 160 \({}^{\circ}\)C (20.38 \(\pm\) 0.20% and 16.17 \(\pm\) 0.24%, respectively) to 170 and 180 \({}^{\circ}\)C (104.64 \(\pm\) 1.41% and 63.83 \(\pm\) 1.01%, respectively), SPLA20P10 from 35.50 \(\pm\) 2.46% at 160 \({}^{\circ}\)C to higher temperatures and SPLA20P20 with a gradual trend from 25.73 \(\pm\) 3.53% at 150 \({}^{\circ}\)C reaching to 57.85 \(\pm\) 3.38% at 180 \({}^{\circ}\)C. Interestingly, SPLA20P20 samples exhibited lower elongation at break results compared to sample groups containing 10% PEG, such as SPLA0P10 and SPLA20P10.