Abstract
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 °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.
| Original language | English |
|---|---|
| Pages (from-to) | 3631-3638 |
| Number of pages | 8 |
| Journal | Polymer Chemistry |
| Volume | 13 |
| Issue number | 24 |
| DOIs | |
| Publication status | Published - 20 May 2022 |
Bibliographical note
Publisher Copyright:© 2022 The Royal Society of Chemistry
Funding
The authors thank the Istanbul Technical University Research Fund (project number: 43364) for financial support. One of the authors, S. G., would like to thank YOK for the 100/2000 Doctoral Scholarship. The authors thank Prof. Oguz Okay for providing infrastructure for tensile tests. The authors also thank Prof. Seniha Guner and Banu A. Kocaaga for rheology measurements.
| Funders | Funder number |
|---|---|
| Istanbul Technical University Research Fund | 43364 |