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Chemical Structure and Thermal Properties versus Accelerated Aging of Bio-Based Poly(ether-urethanes) with Modified

Julia Godlewska1, Joanna Smorawska1, Ewa Głowińska1

  • 1Department of Polymers Technology, Faculty of Chemistry, Gdansk University of Technology, 11/12 Gabriel Narutowicza Street, 80-233 Gdansk, Poland.

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|August 10, 2024
PubMed
Summary

This study synthesized bio-based thermoplastic poly(ether-urethane) elastomers (bio-TPUs) and subjected them to accelerated aging. Results show aging significantly impacts the supramolecular structure of these sustainable polymers.

Keywords:
accelerated agingbio-based poly(ether-urethanes)phase separationthermal stability

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Area of Science:

  • Polymer Science
  • Materials Science
  • Sustainable Chemistry

Background:

  • Polymer aging affects material performance during use and storage.
  • Predicting polymer lifetime is essential for effective material design.
  • Bio-based polymers offer sustainable alternatives to traditional petroleum-based materials.

Purpose of the Study:

  • To synthesize and investigate bio-based thermoplastic poly(ether-urethane) elastomers (bio-TPUs) with modified hard segments.
  • To understand the structural and property changes in bio-TPUs induced by accelerated aging.
  • To evaluate the thermal stability and decomposition behavior of aged bio-TPUs.

Main Methods:

  • Synthesis of bio-TPUs using a prepolymer method with bio-based polyols and diisocyanates.
  • Accelerated aging under thermal and hydrothermal conditions.
  • Characterization using Fourier transform infrared spectroscopy (FTIR), differential scanning calorimetry (DSC), thermogravimetric analysis (TGA), and dynamic mechanical thermal analysis (DMTA).

Main Results:

  • Bio-TPUs exhibited two-stage decomposition and thermal stability up to approximately 300 °C.
  • Accelerated aging significantly impacted the supramolecular structure of the bio-TPUs.
  • Specific structural and property changes were quantitatively assessed via spectroscopic and thermal analyses.

Conclusions:

  • Accelerated aging alters the supramolecular structure of bio-TPUs.
  • The synthesized bio-TPUs demonstrate considerable thermal stability.
  • This research provides insights into the aging behavior of sustainable elastomers for design considerations.