Synthesis and characterization of a self-healing Epichlorohydrin-co-Ethylene Oxide-co-Allyl Glycidyl ether-based polymer by modification using the stable Nitroxide Radical 2,2,6,6-Tetramethylpiperidine 1-oxyl

Haliouche A., Esin Z., AKSÜT D., ÇOLAK Ş., Benbellat N., ŞEN M.

JOURNAL OF MOLECULAR STRUCTURE, 2025 (SCI-Expanded) identifier

  • Yayın Türü: Makale / Tam Makale
  • Basım Tarihi: 2025
  • Doi Numarası: 10.1016/j.molstruc.2024.141162
  • Dergi Adı: JOURNAL OF MOLECULAR STRUCTURE
  • Derginin Tarandığı İndeksler: Science Citation Index Expanded (SCI-EXPANDED), Scopus, Academic Search Premier, Chemical Abstracts Core, Chimica, Compendex, INSPEC
  • Hacettepe Üniversitesi Adresli: Evet

Özet

To provide the poly (epichlorohydrin-co-ethylene oxide-co-allyl glycidyl) polymer (GECO) with the intrinsic self- healing capacity, different GECO-tetramethylpiperidine-1-oxyl (-TEMPO) polymers based on alkoxyamine were synthesized. The main objective of this study was to investigate the thermal reversibility, thermal stability, thermal behavior, and healing performance of GECO-based alkoxyamines. Thanks to the dynamic equilibrium of the thermally reversible reaction of the C-ON bond in alkoxyamine, the cracked parts of the functionalized GECO material could be repeatedly reconnected at a specific temperature, and scanning electron microscopy and electron spin resonance characterized the self-healing capacity and the decomposition reversibility. In addition to the richness of this polymer with the oxide segment, the steric hindrance of TEMPO caused the activation of C-ON bonds and the radical recombination (self-healing) at lower temperatures. The reversibility of alkoxyamine derivatives based on 4-VP and styrene was also studied after incorporating the C-ON bonds and these monomers into the GECO polymer structure. The resulting materials have shown healing ability several times. The results could help optimize the material and influence the future design of elastomers derived from a GECO polymer.