Exploiting the reversible covalent bonding of boronic acids for self-healing/recycling of main-chain polybenzoxazines

Gulyuz S., Yağcı Y., Kışkan B.

POLYMER CHEMISTRY, cilt.13, ss.3631-3638, 2022 (SCI-Expanded) identifier identifier

  • Yayın Türü: Makale / Tam Makale
  • Cilt numarası: 13
  • Basım Tarihi: 2022
  • Doi Numarası: 10.1039/d2py00068g
  • Dergi Adı: POLYMER CHEMISTRY
  • Derginin Tarandığı İndeksler: Science Citation Index Expanded (SCI-EXPANDED), Scopus, Biotechnology Research Abstracts, Chemical Abstracts Core, Chimica, Compendex, INSPEC
  • Sayfa Sayıları: ss.3631-3638
  • İstanbul Teknik Üniversitesi Adresli: Evet

Özet

In this work, a new strategy for the synthesis of self-healable/recyclable polybenzoxazine networks under mild conditions by exploiting dynamic B-O bond exchanges is presented. The process is based on mixing main chain polybenzoxazine precursors with phenyl boronic acid and heating up to 180 degrees C. The obtained polybenzoxazine films displayed good self-healing properties at low temperatures and very mild pressures in the absence of additives to promote the healing process. The recovery extent of the films was quantified by tensile tests. The stress relaxation and sweep frequency behaviour of the films were analyzed by rheological measurements. The spectral and thermal behaviors of the films were also investigated. Moreover, the networks showed higher hydrolysis stability than those of conventional boronic esters because of the intramolecular coordination of B-N in the linkages.