| Summary: | Scheme S1. Synthesis of poly(ε-caprolactone) from 1,8-octanediol and ε-caprolactone, using ammonium decamolybdate as a catalyst; Figure S1: It shows the FT-IR spectrum of the urea sample derived from HDI and water; Figure S2. Variable OH/URET response vs. the two levels of: temperature, concentration, time, and type of solvent (dielectric constant); Figure S3. 1H NMR spectrum of acetonitrile used as a solvent in the synthesis of PEUs from the 24 factorial design; Figure S4. This figure illustrates the two-way interaction effects incorporated into the model derived from the 24 factorial design. Among the evaluated factors, temperature and dielectric constant emerged as the only significant effects. The analysis was conducted using the OH/URET response; Table S1. Each possible combination of factor levels (treatments) of the design is shown 24; Table S2. All combinations of factors (reaction temperature and time, molar concentration of the macrodiol, and type of solvent) from the experimental design 24 are presented. The results of two response variables, specifically polydispersity and the number-average molecular weight (Mn), are shown. Additionally, the relative ambient humidity percentage during the synthesis of polyurethanes is reported; Table S3. Summary of the comparison of means for the interaction Temperature*Type of solvent (Mn response by GPC); Table S4. Summary of comparisons of means of the interaction Temperature*Time; Table S5. Summary of comparison of means Time*Type of solvent; Table S6. The comparison of various levels within the three-way interaction among temperature, solvent type (characterized by dielectric constant), and reaction time—based on the model developed from a 24 factorial design—has been summarized, focusing on the polydispersity response; Table S7. Calculation of Mₙ by ¹H NMR from the quantification of HOPCLOH (OH/ESTER response) before and after its reaction with the diisocyanate; Table S8. The Analysis of Variance (ANOVA) for the 24 experimental design is presented, using the average molecular weight (Mn) obtained via Gel Permeation Chromatography (GPC) as the response variable. Effects that were determined to be statistically significant are highlighted in bold and italics; Table S9. Factors influencing the different response variables (response Mn, OH/ESTER response, ΔHm response, and OH/URET response); Table S10. Presents the proposed rangea of band assignments in the FT-IR spectrum for the polyurethane (PEUs) synthesized in this study; Table S11. The results of the response variables ΔHm (J/g) and Tm (°C) are shown; Table S12. Simplified ANOVA table derived from the 24 factorial design using the ESTER/URET response; Table S13. This table presents a summary of the comparison of significant three-way interactions identified using the OH/URET response. These interactions were derived from the model based on the 24 factorial design; Table S14. It shows the reduced ANOVA derived from the model of 24 factorial design using the polydispersity response.
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