Continuous flame-retardant actions of two phosphate esters with expandable graphite in rigid polyurethane foams

被引：101
作者：
Xi, Wang [1 ]
Qian, Lijun [1 ]
Huang, Zhigang [1 ]
Cao, Yanfang [1 ]
Li, Linjie [1 ]
机构：
[1] Beijing Technol & Business Univ, Sch Mat Sci & Mech Engn, 11 Fucheng Rd, Beijing 100048, Peoples R China
来源：
POLYMER DEGRADATION AND STABILITY | 2016年 / 130卷
关键词：
Flame retardant; Polyurethane foams; EG; Phosphate ester; FIRE BEHAVIOR; HALOGEN-FREE; DIMETHYL METHYLPHOSPHONATE; THERMAL-DEGRADATION;
D O I：
10.1016/j.polymdegradstab.2016.06.003
中图分类号：
O63 [高分子化学（高聚物）];
学科分类号：
070305 ; 080501 ; 081704 ;
摘要：
The flame-retardant rigid polyurethane foams (RPUFs) with dimethyl methylphosphonate (DMMP)/[bis(2-hydroxyethyl)amino]-methyl-phosphonic acid dimethyl ester (BH)/expandable graphite (EG) were prepared by box foaming. The DMMP/BH/EG flame-retardant system with certain components ratio increased the LOI value, decreased the peak value of heat release rate, sustained the effective heat of combustion and total heat release in low level, and promote the formation of phosphorus-rich compact char layer comparing with DMMP/EG and BH/EG systems. The results imply that DMMP/BH/EG possessed the trinary synergistic flame-retardant effect. The results from thermogravimetric analysis (TGA) and TGA-gas chromatography-mass spectrometer (TGA-GC-MS) all confirmed that the trinary synergistic effect of DMMP/BH/EG was caused by the continuous release of DMMP/EG and BH/EG flame-retardant actions with increasing temperature. DMMP/EG and BH/EG in sequence worked in inhibiting flame and forming phosphorus-rich char layer, thus forming stable flame-retardant action on matrix and endowing RPUFs with the increased flame-retardant performance. (C) 2016 Elsevier Ltd. All rights reserved.
引用
收藏
页码：97 / 102
页数：6
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