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Capítulos
- 00:04Introduction
- 01:15Green Knoevenagel Condensation of Syringaldehyde Towards Sinapinic Acid with 5 Mol% Ammonium Bicarbonate
- 02:30Hydrogenation of Sinapinic Acid Towards Dihydrosinapinic Acid with Nickel
- 03:45Acetylation of Dihydrosinapinic Acid Towards Acetylated Monomers and Oligomers (prepolymer)
- 04:38Polymerization of Acetylated Monomers and Oligomers
- 06:14Representative Procedure for the Depolymerization of Poly-S in 1 M NaOH
- 07:26Results: Step-growth Polycondensation of 4-Acetoxy-dihydrosinapinic Acid
- 09:36Conclusion
An example of a closed-loop approach towards a circular materials economy is described here. A whole sustainable cycle is presented where biobased semi-aromatic polyesters are designed by polymerization, depolymerization, and then re-polymerized with only slight changes in their yields or final properties.
