Synthesis of an efficient phosphorus and triazine ring-containing reactive flame retardant for epoxy resin

Abstract

Purpose

In order to find an appropriate method to synthesize a new high-efficiency flame retardant for epoxy resin.

Design/methodology/approach

In this work, a flame retardant with heterocyclic groups, HOMP, was acquired after removing the obstacle from triazines which was not readily soluble. The molecular structure, thermal and flame retardant properties were fully characterized and analyzed. Also, the mechanism was researched through multi-methodologies. As well, the authors evaluated the effects of HOMP on mechanical properties.

Findings

The results suggested that HOMP helped extinguish the combustion of specimens and could reach an LOI value of 29.2% and the V0 level in the UL-94 test with a phosphorus content of only 0.6wt%. With respect to the mechanism, HOMP was a gas-phase flame retardant and helped generate a thicker carbon protective coating. However, for the mechanical properties, the addition of HOMP enhanced the compressibility, while the tensile strength decreased significantly.

Originality/value

The approach not only simplified the operations but also obtained HOMP with excellent flame retardant properties.

Citation

Yang, F., Wang, J., Wang, C., Chen, J. and Ding, A. (2023), "Synthesis of an efficient phosphorus and triazine ring-containing reactive flame retardant for epoxy resin", Multidiscipline Modeling in Materials and Structures, Vol. 19 No. 4, pp. 587-603. https://doi.org/10.1108/MMMS-11-2022-0259