文献类型：期刊文献

英文题名：The flame retarding mechanism of the novolac as char agent with the fire retardant containing phosphorous-nitrogen in thermoplastic poly(ether ester) elastomer system

作者：Zhong, Yuhua[1];Wu, Wei[1];Wu, Ren[1];Luo, Qiaoling[1];Wang, Zheng[1]

机构：[1]E China Univ Sci & Technol, Dept Mat & Technol, Sino German Joints Res Ctr Adv Mat, Shanghai 200237, Peoples R China

年份：2014

卷号：105

期号：1

起止页码：166

外文期刊名：POLYMER DEGRADATION AND STABILITY

收录：;EI(收录号：20142117750841);WOS:【SCI-EXPANDED(收录号:WOS:000338004200019)】；

语种：英文

外文关键词：Halogen-free flame retarding; Thermoplastic poly(ether ester) elastomer (TPEE); Novolac; Flame retarding mechanism

摘要：In this paper, the flame retarding mechanism of novolac as char agent and the phosphorous-nitrogen (P-N) flame retardant system was investigated in thermoplastic poly(ether ester) elastomer(TPEE) composites containing aluminum diethylphosphinic (AlPi) and melamine polyphosphate (MPP). The fire resistance of TPEE containing P-N flame retardant and novolac was analyzed by the limiting oxygen index (LOI) and the vertical burning (UL94) test. The result shows that the flame retardants containing P-N increased the LOI of the material from 17.3 to 27%. TPEE containing P-N flame retardants just got UL94 V-2 ranking, which resulted in the flaming dripping phenomenon. On the other hand, TPEE containing P-N flame retardant and novolac achieved UL94 V-0 rating. The mechanism of thermal decomposition and char formation was studied by thermal gravimetric analysis (TGA), temperature-dependent FTIR and Pyrolysis/GC/MS. TGA and SEM-EDX measurements have demonstrated that novolac results in the increase of char yield and the formation of the thermally stable carbonaceous char. The results of FTIR and Pyrolysis/GC/MS analyses indicated that cross-linking reaction between the novolac and P-N flame retardant and polyaromatisation of the novolac itself which resulted in a strong compact carbonaceous char. Therefore, novolac is a promising synergist for the P-N flame retardant in TPEE. (C) 2014 Elsevier Ltd. All rights reserved.