Green Knoevenagel Condensation of Syringaldehyde Towards Sinapinic Acid with 5 Mol% Ammonium Bicarbonate
2:30
Hydrogenation of Sinapinic Acid Towards Dihydrosinapinic Acid with Nickel
3:45
Acetylation of Dihydrosinapinic Acid Towards Acetylated Monomers and Oligomers (prepolymer)
4:38
Polymerization of Acetylated Monomers and Oligomers
6:14
Representative Procedure for the Depolymerization of Poly-S in 1 M NaOH
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Results: Step-growth Polycondensation of 4-Acetoxy-dihydrosinapinic Acid
9:36
Conclusion
副本
Throughout the synthesis described in this paper provides a way to produce a new polymeric material specifically designed for molecular recycling, which is a way of chemical recycling. The depolarization and repolarization of the foreign material
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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.