Issue 81, 2017, Issue in Progress
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RSC Advances

Gaseous-phase flame retardant behavior of a multi-phosphaphenanthrene compound in a polycarbonate composite

Yong Qiu,ab   Zhen Liu,b   Lijun Qian ORCID logo *b  and  Jianwei Hao*a  

* Corresponding authors

a National Laboratory of Flame Retardant Materials, National Engineering and Technology Research Center of Flame Retardant Materials, School of Materials Science and Engineering, Beijing Institute of Technology, Beijing 100081, P. R. China
E-mail: hjw@bit.edu.cn

b Engineering Laboratory of Non-halogen Flame Retardants for Polymers, School of Materials Science and Mechanical Engineering, Beijing Technology and Business University, Beijing 100048, P. R. China
E-mail: qianlj@th.btbu.edu.cn

Abstract

A multi-phosphaphenanthrene compound (TDBA) was incorporated into polycarbonate (PC) to prepare a flame retardant composite. TDBA improved the flame retardancy of the PC material effectively. The PC composite comprising 10 wt% TDBA passed the UL94 V-0 level with a LOI value of 33.7%. The incorporation of TDBA effectively inhibited the combustion intensity of the TDBA/PC composite via reducing the production of flammable methane and carbonyl-containing substances, suppressing the oxidative process of combustible pyrolysis products, and promoting the PC matrix to form large-scale smoke particles. All these were caused by releasing phosphaphenanthrene fragments, PO, and phenoxyl free radicals from pyrolyzed TDBA. As an additive-type flame retardant with multiple phosphaphenanthrene groups, TDBA was verified to exert its effect mainly in the gaseous phase during flame retarding of PC materials.

Graphical abstract: Gaseous-phase flame retardant behavior of a multi-phosphaphenanthrene compound in a polycarbonate composite

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Article information

DOI
https://doi.org/10.1039/C7RA11069C
Article type
Paper
Submitted
08 Oct 2017
Accepted
30 Oct 2017
First published
03 Nov 2017
This article is Open Access
Creative Commons BY license

RSC Adv., 2017,7, 51290-51297

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Gaseous-phase flame retardant behavior of a multi-phosphaphenanthrene compound in a polycarbonate composite

Y. Qiu, Z. Liu, L. Qian and J. Hao, RSC Adv., 2017, 7, 51290 DOI: 10.1039/C7RA11069C

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