Details

Autor(en) / Beteiligte

• Ren, Shitong
• Tian, Fangjing
• Xiao, Fengjuan
• Peng, Zheng
• Du, Yonggang

Titel

Polymerization behaviors and properties of benzoxazine resins based-on meta-substituted anilines

Ist Teil von

• Thermochimica acta, 2024-06, Vol.736, p.179743, Article 179743

Ort / Verlag

Elsevier B.V

Erscheinungsjahr

2024

Quelle

Elsevier ScienceDirect Journals

Beschreibungen/Notizen

• •Electron-donating substituent increased the polymerization activity of benzoxazine.•Electron-withdrawing substituent increased the heat resistance of polybenzoxazine.•Impacts of meta-substituents on thermal stability of polybenzoxazines were complex. The molecular structure of benzoxazine is closely related to its polymerization activity and the properties of its polymer. In this work, benzoxazines were successfully synthesized from phenol, paraformaldehyde and meta-substituted anilines. Their polymerization behaviors were discussed by non-isothermal differential scanning calorimetry (DSC). Moreover, the thermal properties of corresponding polybenzoxazines were evaluated using DSC and thermogravimetric analysis. The results showed that the electron-withdrawing substituent increased the polymerization temperature while the electron-donating substituent lowered the polymerization temperature. The glass transition temperature decreased for polybenzoxazine with electron-donating substituent but elevated for polybenzoxazine with electron-withdrawing substituent. Besides, the thermal stability and thermal degradation mechanism of polybenzoxazine were significantly affected by the substituent. This work supplied further insight in the structure-property relationship of benzoxazine resin. [Display omitted]