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Reprocessable Polybenzoxazine Thermosets with High T gs and Mechanical Strength Retentions Using Boronic Ester Bonds as Crosslinkages. Polymers (Basel) 2022; 14:polym14112234. [PMID: 35683905 PMCID: PMC9182748 DOI: 10.3390/polym14112234] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/08/2022] [Revised: 05/21/2022] [Accepted: 05/23/2022] [Indexed: 01/25/2023] Open
Abstract
In order to obtain reprocessable polybenzoxazine thermosets with high heat resistance and mechanical strength retentions, network structures without irreversible parts were constructed via crosslinking benzoxazine oligomers using boronic ester cross-linkers. Firstly, the benzoxazine monomer containing carbon–carbon double bonds was synthesized via the Mannich reaction. After thermal ring-opening polymerization, the benzoxazine oligomer containing carbon–carbon double bonds (OBZ) was yielded. Through the thiol-ene click reaction of the OBZ and dithiol cross-linker bearing boronic ester bonds, the polybenzoxazine thermosets using boronic ester bonds as crosslinkages (OBZ-BDB) were successfully synthesized. The structures of OBZ and OBZ-BDB were characterized by SEC, 1H NMR, and FT-IR measurements. Reprocessing experiments showed that OBZ-BDB has remarkable reprocessability. The retention rates of the tensile strengths through three generations of reprocessing were 98%, 95%, and 84%, respectively. Meanwhile, OBZ-BDB cross-linked by boronic ester bonds had brilliant thermal properties. The Tg of the original OBZ-BDB was 224 °C. With the increase of the reprocessing generations, the Tgs basically remained unchanged.
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Tavernier R, Granado L, Tillard M, Van Renterghem L, Métro TX, Lamaty F, Bonnaud L, Raquez JM, David G, Caillol S. Solvent-free synthesis of a formaldehyde-free benzoxazine monomer: study of its curing acceleration effect for commercial benzoxazine. Polym Chem 2022. [DOI: 10.1039/d2py00462c] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A new 2-substituted benzoxazine bearing a phenol was blended with commercial benzoxazine for improving curing and thermomechanical properties.
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Affiliation(s)
- Romain Tavernier
- ICGM, Univ Montpellier, CNRS, ENSCM, Montpellier, France
- Laboratory of Polymeric and Composite Materials (LPCM), Center of Innovation and Research in Materials, Materia Nova Research Center & University of Mons (UMONS), Place du Parc 20, 7000 Mons, Belgium
| | - Lérys Granado
- ICGM, Univ Montpellier, CNRS, ENSCM, Montpellier, France
| | | | - Louis Van Renterghem
- Laboratory of Polymeric and Composite Materials (LPCM), Center of Innovation and Research in Materials, Materia Nova Research Center & University of Mons (UMONS), Place du Parc 20, 7000 Mons, Belgium
| | | | | | - Leïla Bonnaud
- Laboratory of Polymeric and Composite Materials (LPCM), Center of Innovation and Research in Materials, Materia Nova Research Center & University of Mons (UMONS), Place du Parc 20, 7000 Mons, Belgium
| | - Jean-Marie Raquez
- Laboratory of Polymeric and Composite Materials (LPCM), Center of Innovation and Research in Materials, Materia Nova Research Center & University of Mons (UMONS), Place du Parc 20, 7000 Mons, Belgium
| | - Ghislain David
- ICGM, Univ Montpellier, CNRS, ENSCM, Montpellier, France
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Wang T, Shi CY, Qadeer Dayo A, Guo ZY, Wang J, Wang Y, Gorar AAK, Qiu J, Liu WB. Synthesis and properties of novel self-catalytic phthalonitrile monomers with aliphatic chain and their copolymerization with multi-functional fluorene-based benzoxazine monomers. Eur Polym J 2021. [DOI: 10.1016/j.eurpolymj.2021.110862] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/01/2022]
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