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Related Concept Videos

Types of Step-Growth Polymers: Polyesters01:20

Types of Step-Growth Polymers: Polyesters

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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.
Polyesters are commonly prepared from terephthalic acid and ethylene glycol; the crude product is known as poly(ethylene terephthalate) or PET. However, polyesters are synthesized industrially by transesterification of dimethyl terephthalate with ethylene glycol at 150 °C. The two reactants and the...
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Polymer Classification: Stereospecificity01:26

Polymer Classification: Stereospecificity

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Polymerization generates chiral centers along the entire backbone of a polymer chain. Accordingly, the stereochemistry of the substituent group has a significant effect on polymer properties. Polymers formed from monosubstituted alkene monomers feature chiral carbons at every alternate position in the polymer backbone. Relative to the predominant orientation of substituents at the adjacent chiral carbons, the polymer can exist in three different configurations: isotactic, syndiotactic, and...
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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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Molecular Weight of Step-Growth Polymers01:08

Molecular Weight of Step-Growth Polymers

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Step growth polymerization involves bi or multifunctional monomers. Bifunctional monomers react to form linear step growth polymers, whereas multifunctional monomers react to form non-linear or branched polymers.
As the step-growth polymerization involves step-wise condensation of monomers, the molecular weight also builds up eventually. Consequently, high molecular weight polymers are obtained at the late stages of the polymerization, where 99% of monomers have been consumed.
The extent of the...
2.3K
Polymer Classification: Crystallinity01:21

Polymer Classification: Crystallinity

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Unlike ionic or small covalent molecules, polymers do not form crystalline solids due to the diffusion limitations of their long-chain structures. However, polymers contain microscopic crystalline domains separated by amorphous domains.
Crystalline domains are the regions where polymer chains are aligned in an orderly manner and held together in proximity by intermolecular forces. For example, chains in the crystalline domains of polyethylene and nylon are bound together by van der Waals...
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Polymer Classification: Architecture01:14

Polymer Classification: Architecture

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Polymers are classified as linear or branched on the basis of their chain architecture. The polymer chains in linear polymers have a long chain-like structure with minimal to no branching at all. Even if a polymer features large substituent groups on the monomer, which appear as branches to the skeleton, it is not considered a branched polymer. A branched polymer contains secondary polymer chains that arise from the main polymer chain. The branching occurs when the polymer growth shifts from...
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Updated: Sep 22, 2025

Designed for Molecular Recycling: A Lignin-Derived Semi-aromatic Biobased Polymer
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Designed for Molecular Recycling: A Lignin-Derived Semi-aromatic Biobased Polymer

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Chemically Recyclable CO2 -Based Solid Polyesters with Facile Property Tunability.

Yongjia Lou1, Jialin Xu1, Luyan Xu1

  • 1School of Physical Science and Technology, ShanghaiTech University, Shanghai, 201210, China.

Macromolecular Rapid Communications
|May 25, 2022
PubMed
Summary
This summary is machine-generated.

Chemically recyclable solid polyesters synthesized from carbon dioxide (CO2) achieve high molecular weights and tunable properties. This breakthrough offers a sustainable route for new polymers and aids in reducing plastic pollution.

Keywords:
CO2 utilizationCO2-based polyesterschemical recyclabilitypolymeric property tunabilityring-opening polymerization

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Area of Science:

  • Polymer Chemistry
  • Sustainable Materials Science
  • Green Chemistry

Background:

  • Chemical recycling of solid polymeric materials is crucial for carbon-neutral production and mitigating plastic pollution.
  • High molecular weight is essential for polymers to possess desirable properties for diverse applications.
  • Existing CO2-based polyesters lack facile property tunability and high molecular weights.

Purpose of the Study:

  • To develop a novel synthetic route for high molecular weight, chemically recyclable CO2-based solid polyesters.
  • To achieve facile property tunability in these novel polyester materials.
  • To demonstrate complete monomer recovery and explore further functionalization.

Main Methods:

  • Development of a new synthetic pathway for CO2-based polyesters.
  • Characterization of polymer molecular weight and dispersity.
  • Utilizing photo-initiated thiol-ene click reactions for property tuning.

Main Results:

  • Successful synthesis of chemically recyclable CO2-based solid polyesters with high molecular weights (up to 587.7 kg mol-1) and narrow dispersity (Đ < 1.2).
  • Complete recovery of monomers from the synthesized poly(δLH2) material.
  • Demonstrated facile property tuning via preserved terminal alkene groups using thiol-ene click chemistry.

Conclusions:

  • The novel synthetic route provides access to high-performance, CO2-based recyclable polyesters.
  • The ability to tune properties broadens the application scope of these sustainable polymers.
  • This work presents a significant advancement in developing sustainable and functional polymeric materials from CO2.