Products Cited in Publications Worldwide High glass transition catalyst-free fire-retardant polybenzoxazine vitrimer through solventless one-pot method

High glass transition catalyst-free fire-retardant polybenzoxazine vitrimer through solventless one-pot method

Festus Ifeanyi Anagwu; Alex A. Skordos

DOI:

Abstract

A high-temperature polybenzoxazine vitrimer has been synthesised by a solventless one-potmethod involving the Mannich condensation of a phenolic disulphide, paraformaldehyde andaniline. The polybenzoxazine has a glass transition temperature of 155℃ and exhibitsthermosetting behaviour below the glass transition temperature. Dynamic bond exchangeenabled by disulphide metathesis associated with a topological freezing temperature of 78℃ results in healing over the glass transition temperature. The system is reprocessable at 190℃ has a glassy modulus of 3.6 GPa, and a limiting oxygen index (LOl) of 40.5%. The combinationof thermosetting character, ease of synthesis, good processability, fire retardancy andreprocessability of this polybenzoxazine vitrimer system make it an attractive candidatematerial solution as a matrix for recyclable and self-repairable aerospace thermosettingcontinuous fibre composites.

Keywords

Composites ; benzoxazine ; vitrimer ; self-healing

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Elastase-IN-3

A18350215015-57-398%

Elastase-IN-3

70.0/25g

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