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Related Concept Videos

Types of Step-Growth Polymers: Polyesters01:20

Types of Step-Growth Polymers: Polyesters

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 polymer...
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Updated: May 12, 2026

Extraction of Lignin with High &#946;-O-4 Content by Mild Ethanol Extraction and Its Effect on the Depolymerization Yield
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Extraction of Lignin with High β-O-4 Content by Mild Ethanol Extraction and Its Effect on the Depolymerization Yield

Published on: January 7, 2019

High-Performance Lignin-Based Polyurethane Elastomer via Solvent Fractionation.

Changgeng Li1, Lu Wu1, Zhongshan Wang2

  • 1Liaoning Key Laboratory of Lignocellulose Chemistry and Biomaterials, The Key Laboratory of High Value Utilization of Botanical Resources of China Light Industry, The Liaoning Province Key Laboratory of Paper and Pulp Engineering, College of Light Industry and Chemical Engineering, Dalian Polytechnic University, Dalian 116034, China.

Biomacromolecules
|March 2, 2026
PubMed
Summary
This summary is machine-generated.

Researchers improved polyurethane elastomers by incorporating lignin, a renewable resource. Adjusting lignin

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Ultrafast Lignin Extraction from Unusual Mediterranean Lignocellulosic Residues
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Ultrafast Lignin Extraction from Unusual Mediterranean Lignocellulosic Residues

Published on: March 9, 2021

Area of Science:

  • Polymer Science
  • Materials Science
  • Biomass Utilization

Background:

  • Lignin's poor compatibility and low substitution limit its use as a polyol substitute in polyurethane (PU) elastomers.
  • Developing effective methods to integrate lignin into PU is crucial for sustainable material development.

Purpose of the Study:

  • To achieve high-content and uniform bonding of lignin in PU by regulating its molecular weight.
  • To enhance the mechanical properties, thermal stability, and surface hydrophobicity of PU elastomers using lignin.

Main Methods:

  • Controlled modification of lignin molecular weight for improved compatibility.
  • Incorporation of modified lignin into polyurethane macromolecular chains.
  • Characterization of mechanical properties, thermal stability, and surface hydrophobicity.
  • Fabrication of MXene/PU composites for strain-responsive devices.

Main Results:

  • Achieved full integration of lignin into PU even at 15% substitution, increasing tensile strength by 27% and elongation at break by 124%.
  • Adjusting lignin molecular weight led to over 165% enhancement in tensile strength.
  • Significantly improved thermal stability and surface hydrophobicity of the resulting elastomer.
  • Demonstrated sensitive strain responsiveness in MXene/PU composite devices.

Conclusions:

  • Regulating lignin molecular weight effectively overcomes compatibility issues, enabling its high-content integration into PU.
  • Lignin incorporation significantly enhances PU elastomer performance and introduces new functionalities.
  • This approach promotes the green and sustainable development of PU for advanced applications, including wearable devices.