Abstract
Photo-induced cationic ring opening reactions were performed on main chain polybenzoxazine precursors using iodonium salts. Gelation of the precursors was observed in a relatively short time upon photolysis at 300 nm. The obtained gels contained unreacted oxazines and subsequent thermal curing was applied successfully at relatively lower temperatures compared to typical benzoxazines. The main chain polybenzoxazine precursors are shown to have a dual curable character that could be beneficial for deep curing purposes. Moreover, the photocuring wavelength was extended to higher wavelengths using sensitizers such as thioxanthone and camphorquinone in the formulations. All the intermediates and final products were characterized by NMR, FTIR, and UV-Vis spectroscopies and differential scanning calorimetry (DSC) and thermo-gravimetric analysis (TGA) investigation.
| Original language | English |
|---|---|
| Pages (from-to) | 5781-5786 |
| Number of pages | 6 |
| Journal | Polymer Chemistry |
| Volume | 12 |
| Issue number | 40 |
| DOIs | |
| Publication status | Published - 28 Oct 2021 |
Bibliographical note
Publisher Copyright:© 2021 The Royal Society of Chemistry.
Funding
The authors thank the Istanbul Technical University Research Fund and the Scientific and Technological Research Council of Turkey (TUBITAK, Project Number: 120C121) for financial support. One of the authors, Z.D., would like to thank YOK for the 100/2000 doctoral scholarship and the TUBITAK 2211-A National Graduate Scholarship.
| Funders | Funder number |
|---|---|
| Istanbul Technical University Research Fund | |
| TUBITAK | 120C121 |
| Türkiye Bilimsel ve Teknolojik Araştirma Kurumu |