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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.
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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Selective Elastane Removal Using DMSO-DBN Under Moderate Temperatures: From Pure Filaments to Cotton/Polyester

Tiago Azevedo1, Ana Catarina Silva1, Diego M Chaves1

  • 1Centre for Textile Science and Technology (2C2T), University of Minho, 4800-058 Guimarães, Portugal.

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|December 31, 2025
PubMed
Summary
This summary is machine-generated.

Dimethyl sulfoxide with a catalyst efficiently degrades elastane in textile blends. This selective removal aids fibre-to-fibre recycling by improving material quality and enabling circular textile manufacturing.

Keywords:
DBN catalysisDMSOelastane degradationfibre-to-fibre recyclingtextile waste

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Area of Science:

  • Textile Chemistry
  • Materials Science
  • Sustainable Manufacturing

Background:

  • Selective elastane removal is crucial for effective fibre-to-fibre recycling.
  • Elastane presence hinders mechanical recycling processes and limits recovered fibre applications.

Purpose of the Study:

  • To investigate dimethyl sulfoxide (DMSO) as a solvent for elastane degradation.
  • To evaluate the catalytic effect of 1,5-diazabicyclo[4.3.0]non-5-ene (DBN) on elastane removal.
  • To assess the feasibility of this method for textile waste recycling.

Main Methods:

  • Treatment of elastane and textile blends with DMSO at varying temperatures (80-120 °C) and times (10-60 min).
  • Use of DBN as an organic base catalyst (0.1% v/v).
  • Analysis using scanning electron microscopy (SEM), tensile testing, and dimensional analysis.

Main Results:

  • DMSO alone achieved partial elastane mass loss (up to 79%).
  • The DMSO-DBN system enabled near-complete to complete elastane mass loss (81-100%) under mild conditions.
  • Treated cotton/elastane and polyester/elastane blends showed significant dimensional relaxation and preserved fibre integrity.

Conclusions:

  • The DMSO-DBN system offers an energy-efficient and scalable method for selective elastane degradation.
  • This approach supports fibre-to-fibre recycling and advances circular economy principles in textiles.
  • The method effectively removes elastane while maintaining the quality of other textile fibres.