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A Study of Hydroxyl-Terminated Block Copolyether-Based Binder Curing Kinetics.

Wu Yang1, Zhengmao Ding2, Cong Zhu1

  • 1School of Materials Science and Engineering, Beijing Institute of Technology, Beijing 100081, China.

Polymers
|August 29, 2024
PubMed
Summary

This study determined the curing reaction model for hydroxyl-terminated block copolyether (HTPE) using differential scanning calorimetry. Results provide theoretical insights for HTPE

Keywords:
HTPEautocatalytic reaction modelcuring kineticsisoconversional methodsnon-isothermal DSC

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Area of Science:

  • Polymer Chemistry
  • Materials Science

Background:

  • Hydroxyl-terminated block copolyether (HTPE) is a polymer requiring specific curing conditions.
  • Understanding HTPE curing kinetics is crucial for optimizing its application and performance.

Purpose of the Study:

  • To determine the curing reaction model and kinetic parameters of HTPE with different curing agents.
  • To provide a theoretical foundation for the practical application of HTPE.

Main Methods:

  • Non-isothermal differential scanning calorimetry (DSC) was employed to analyze HTPE curing.
  • Three curing systems were investigated: HTPE with N-100, HTPE with isophorone diisocyanate (IPDI), and HTPE with a mixture of N-100 and IPDI.

Main Results:

  • The curing process of HTPE followed an autocatalytic reaction model.
  • Curing activation energies were determined for each system, with N-100 and HTPE showing a slightly lower value (69.37 kJ/mol) compared to IPDI and HTPE (75.60 kJ/mol).
  • Reaction orders (n and m) for N-100 and HTPE were lower than for IPDI and HTPE, with parameters for the mixed curing agent closely resembling those of N-100 and HTPE.

Conclusions:

  • The study successfully established the autocatalytic curing model for HTPE.
  • Kinetic parameters were quantified, offering valuable data for predicting and controlling HTPE curing processes.
  • The findings validate the theoretical model against experimental data, confirming its reliability for HTPE applications.