Investigating UV light and ziram catalyst as alternative activators for sulfur-promoted benzoxazine curing

Cansın Birsen Buldum, Tugberk Tabak, Baris Kiskan*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

Abstract

High-temperature curing is a major limitation for the widespread use of benzoxazine resins. This study explores two strategies to reduce curing temperatures using minimal sulfur content (1–5 wt%): ziram catalysis and light activation. Both approaches effectively promoted curing at lower temperatures compared to traditional methods. The ziram-activated system achieved an activation energy as low as 83 kJ/mol, while the UV-activated system reached 63 kJ/mol. Furthermore, the UV-activated sulfur system exhibited improved thermal stability, particularly for cresol-based benzoxazines. The curing processes of monomers with catalysts were traced using various techniques, including nuclear magnetic resonance (NMR), Fourier-transform infrared (FT-IR), along with differential scanning calorimetry (DSC).

Original languageEnglish
Article number127745
JournalPolymer
Volume313
DOIs
Publication statusPublished - 15 Nov 2024

Bibliographical note

Publisher Copyright:
© 2024 Elsevier Ltd

Keywords

  • Catalyst
  • Elemental sulfur
  • Light-induced cleavage
  • Polybenzoxazine
  • Ring opening polymerization
  • Vulcanization

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