A Novel Spirocyclic Halogen-Free Flame Retardant: Synthesis and Flammability Characteristics in Epoxy Resin Composites

DOI

10.2991/icaemt-15.2015.92How to use a DOI?

Keywords

Intumescent flame retardant; Imidazole spirocyclic phosphoramidate; Epoxy resin

Abstract

A novel spirocyclic halogen-free ame retardant ISCP was successfully synthesized, and its structure was confirmed by FTIR, 1H NMR, and 31P NMR. Results of LOI, UL-94, and CONE tests demonstrated that the ISCP effectively enhanced flame retardancy of EP composites, which could improve the LOI value from 19.5 to 36.8, pass the UL-94 V-0 rating when 20 wt.% ISCP was added, and CONE tests suggested that ISCP could decrease the PHRR and THR remarkably. TGA tests revealed that during the combustion, ISCP could increase the amount of residual char. SEM morphologies indicated that ISCP greatly facilitated the char-forming process and generated uniform and compact intumescent char layer, leading to EP with improved flame retardancy.

Copyright

© 2015, the Authors. Published by Atlantis Press.

Open Access

This is an open access article distributed under the CC BY-NC license (http://creativecommons.org/licenses/by-nc/4.0/).

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TY  - CONF
AU  - Hongcheng Li
AU  - Jiping Liu
AU  - Jiayi Zhao
PY  - 2015/08
DA  - 2015/08
TI  - A Novel Spirocyclic Halogen-Free Flame Retardant: Synthesis and Flammability Characteristics in Epoxy Resin Composites
BT  - Proceedings of the 2015 International Conference on Advanced Engineering Materials and Technology
PB  - Atlantis Press
SP  - 477
EP  - 481
SN  - 2352-5401
UR  - https://doi.org/10.2991/icaemt-15.2015.92
DO  - 10.2991/icaemt-15.2015.92
ID  - Li2015/08
ER  -