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Types of Step-Growth Polymers: Polyesters01:20

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The introduction of polyesters has brought major development to the textile industry. The wrinkle-free behavior of polyester blends has eliminated the need for starching and ironing clothes.
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Polymers02:34

Polymers

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The word polymer is derived from the Greek words “poly” which means “many” and “mer” which means “parts”. Polymers are long chains of molecules composed of repeating units of smaller molecules, known as monomers. They either occur naturally, such as DNA and proteins, or can be constructed synthetically, like plastics. They have varied structural characteristics, such as linear chains, branched chains, or complex networks, that contribute to the...
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Acyclic diene metathesis polymerization or ADMET polymerization involves cross-metathesis of terminal dienes, such as 1,8-nonadiene, to give linear unsaturated polymer and ethylene. As ADMET is a reversible process, the formed ethylene gas must be removed from the reaction mixture to complete the polymerization process.
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-COOH & -OH Condensation Reaction Utilization for Biomass FDCA-based Polyesters.

Jing Yi1,2, Yuze Dai1, Yuxuan Li1

  • 1Division of Energy Materials (DNL 22), Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian, 116023, China.

Chemsuschem
|February 10, 2024
PubMed
Summary

A novel green condensation polymerization method synthesizes FDCA-based polyesters using eco-friendly solvents and catalysts, yielding high-quality materials with tunable properties for sustainable applications.

Keywords:
2,5-furandicarboxylic acidFDCA-based polyestergreen solution polymerization−COOH & −OH condensation

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Area of Science:

  • Polymer Chemistry
  • Green Chemistry
  • Materials Science

Background:

  • Traditional polyester synthesis often involves toxic solvents and high temperatures, leading to discoloration and environmental concerns.
  • 2,5-Furandicarboxylic acid (FDCA)-based polyesters are promising sustainable alternatives to petroleum-based plastics, but their synthesis requires efficient and eco-friendly methods.
  • Achieving high molecular weight and good appearance in FDCA-based polyesters is crucial for their practical applications.

Purpose of the Study:

  • To develop a green and sustainable solution polymerization method for synthesizing FDCA-based polyesters.
  • To investigate the synthesis of poly(ethylene 2,5-furandicarboxylate) (PEF) with improved properties using this new method.
  • To explore the applicability of the method to a range of FDCA-based polyesters and elucidate the catalytic mechanism.

Main Methods:

  • Utilized a -COOH & -OH condensation solution polymerization technique in the green solvent γ-valerolactone (GVL).
  • Employed 4-dimethylaminopyridine (DMAP) and N-(3-dimethylaminopropyl)-N'-ethylcarbodiimide hydrochloride (EDC) as catalysts.
  • Investigated post-polymerization modification via remelting polycondensation and employed in-situ 13C-NMR with 13C-labeled succinic acid for mechanistic studies.

Main Results:

  • Successfully synthesized PEF with a good white appearance and a molecular weight (Mn) of 6.51×103 g mol-1.
  • Achieved rapid molecular weight enhancement (Mn >2.5×104 g mol-1) through remelting polycondensation within minutes, maintaining low dispersity (Đ<1.40).
  • Demonstrated the method's versatility for various FDCA-based polyesters, including those with aliphatic and cycloaliphatic diols, and identified limitations for diols with C=C double bonds due to low heat resistance.

Conclusions:

  • The reported -COOH & -OH condensation solution polymerization offers a green, sustainable, and efficient route for FDCA-based polyesters synthesis.
  • The method avoids discoloration and toxic solvents, producing high-quality polyesters with tunable molecular weights.
  • The study provides a foundational strategy for the scalable and environmentally conscious production of furan-based polyesters.