| Title | Environmental Profile and Technological Validation of New High-Tg Unsaturated Polyesters from Fully Bio-Based Monomers and Reactive Diluents |
|---|---|
| ID_Doc | 18456 |
| Authors | Suriano, R; Gonzalez, MNG; Turri, S |
| Title | Environmental Profile and Technological Validation of New High-Tg Unsaturated Polyesters from Fully Bio-Based Monomers and Reactive Diluents |
| Year | 2021 |
| Published | Journal Of Polymers And The Environment, 29.0, 4 |
| Abstract | This study was focused on the synthesis and characterization of a fully bio-based unsaturated polyester resin (UPR) with good thermal properties suitable for the commercial production of composite polymers. UPRs based on different ratios of bio-based furan dicarboxylic acid (FDCA), itaconic acid, and diols were synthesized. The unsaturated polymers prepared were evaluated by differential scanning calorimetry, gel permeation chromatography, FTIR and H-1-NMR spectroscopy. The results showed positive effects of FDCA on the glass transition temperature (T-g) of these fully bio-based polyesters, especially when FDCA was combined with 1,2-propanediol. Optimal values of T-g were obtained in the range of 30-32 degrees C for UPRs synthesized starting with a higher concentration of FDCA in the monomer feed. The possibility of substituting styrene, which usually acts as a reactive diluent, with a greener and safer alternative during the crosslinking of UPRs, was also explored. Two bio-based reactive diluents were considered: dimethyl itaconate (DMI) and butanediol dimethacrylate. After crosslinking, an average T-g of 75 degrees C and a good crosslinking efficiency indicated by a gel content of 90% were achieved for the fully bio-based polyester obtained under milder reaction conditions and dilution with DMI. Life cycle assessment was performed on selected UPRs, and comparison with a reference fossil-based resin in terms of the calculated category indicator results confirmed the lower environmental impact of the newly prepared bio-based polyesters. |
| https://link.springer.com/content/pdf/10.1007/s10924-020-01928-z.pdf |
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