Catalyzing carbonization function of α-ZrP based intumescent fire retardant polypropylene nanocomposites

被引:137
作者
Yang, Dandan [1 ]
Hu, Yuan [1 ]
Song, Lei [1 ]
Nie, Shibin [1 ]
He, Shuqin [1 ]
Cai, Yibing [1 ]
机构
[1] Univ Sci & Technol China, State Key Lab Fire Sci, Hefei 230027, Anhui, Peoples R China
关键词
Polypropylene; Alpha-zirconium phosphate; Intumescent fire retardant; Nanocomposites; Catalyzing carbonization; Graphite sheets;
D O I
10.1016/j.polymdegradstab.2008.02.012
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 catalyzing carbonization function of alpha-zirconium phosphate (alpha-Zr(HPO4)(2)-H2O, alpha-ZrP) based on an intumescent fire retardant (IFR) polypropylene (PP) system is reported. The IFR system consists of ammonium polyphosphate and pentaerythritol. The morphology of the PP/organophilic ZrP nanocomposites is characterized by X-ray diffraction and high resolution transmission electron microscopy (HRTEM). The results indicate that an intercalated structure is formed. Thermogravimetric analysis, limiting oxygen index (LOI) and UL-94 are used to characterize the thermal stability and the flame retardant properties. It is found that there is a transformation of the char microstructure and an increment of LOI value in the PP systems with the OZrP, and the UL-94 level is improved, from failure, to a V-0 rating. The synergistic effect improves the flame retardant properties of PP remarkably. The morphology and structure (HRTEM and selected area electron diffraction) of the char residue also indicate the presence of graphite sheets. A possible mechanism for catalyzing carbonization is discussed. Crown Copyright (c) 2008 Published by Elsevier Ltd. All rights reserved.
引用
收藏
页码:2014 / 2018
页数:5
相关论文
共 21 条
[1]   INORGANIC-ION EXCHANGERS .10. NEUTRON POWDER DIFFRACTION STUDY OF HYDROGEN-BOND GEOMETRY IN ALPHA-ZR(HPO4)2.H2O - MODEL FOR ION-EXCHANGE [J].
ALBERTSSON, J ;
OSKARSSON, A ;
TELLGREN, R ;
THOMAS, JO .
JOURNAL OF PHYSICAL CHEMISTRY, 1977, 81 (16) :1574-1578
[2]   THE INTERACTION OF POLY(METHYL METHACRYLATE) AND CHROMIUM CHLORIDE - TRANSFER OF METHYL-GROUPS FROM THE ESTER TO THE MAIN CHAIN [J].
BEER, RS ;
WILKIE, CA ;
MITTLEMAN, ML .
JOURNAL OF APPLIED POLYMER SCIENCE, 1992, 46 (06) :1095-1102
[3]  
BOCKHORN H, 1985, J ANAL APPL PYROL, V7, P427
[4]   X-RAY-POWDER DIFFRACTION STUDY OF LAYER COMPOUNDS - THE CRYSTAL-STRUCTURE OF ALPHA-TI(HPO4)2.H2O AND A PROPOSED STRUCTURE FOR GAMMA-TI(H2PO4)(PO4).2H2O [J].
CHRISTENSEN, AN ;
ANDERSEN, EK ;
ANDERSEN, IGK ;
ALBERTI, G ;
NIELSEN, M ;
LEHMANN, MS .
ACTA CHEMICA SCANDINAVICA, 1990, 44 (09) :865-872
[5]   Metal functionalized POSS as fire retardants in polypropylene [J].
Fina, Alberto ;
Abbenhuis, Hendrikus C. L. ;
Tabuani, Daniela ;
Camino, Giovanni .
POLYMER DEGRADATION AND STABILITY, 2006, 91 (10) :2275-2281
[6]   The effect of zirconium addition on the microstructure and properties of chopped carbon fiber/carbon composites [J].
Gao, Xiaoqing ;
Liu, Lang ;
Guo, Quangui ;
Shi, Jingli ;
Zhal, Gengtai .
COMPOSITES SCIENCE AND TECHNOLOGY, 2007, 67 (3-4) :525-529
[7]  
Grand A.F., 2000, FIRE RETARDANCY POLY, pChapter 9
[8]   Synergistic effect of ferric chloride and silicon mixtures on the thermal stabilization enhancement of ABS [J].
Jang, J ;
Kim, J ;
Bae, JY .
POLYMER DEGRADATION AND STABILITY, 2005, 90 (03) :508-514
[9]   Catalysis of intumescent flame retardancy of polypropylene by metallic compounds [J].
Lewin, M ;
Endo, M .
POLYMERS FOR ADVANCED TECHNOLOGIES, 2003, 14 (01) :3-11
[10]   Catalytic action of phospho-tungstic acid in the synthesis of melamine salts of pentaerythritol phosphate and their synergistic effects in flame retarded polypropylene [J].
Liu, Yuan ;
Wang, Qi .
POLYMER DEGRADATION AND STABILITY, 2006, 91 (10) :2513-2519