Does organic modification of layered double hydroxides improve the fire performance of PMMA?

被引：53
作者：
Nyambo, Calistor [1 ,2 ]
Chen, Dan [3 ]
Su, Shengpei [3 ]
Wilkie, Charles A. [1 ,2 ]
机构：
[1] Marquette Univ, Dept Chem, Milwaukee, WI 53201 USA
[2] Marquette Univ, Fire Retardant Res Facil, Milwaukee, WI 53201 USA
[3] Hunan Normal Univ, Coll Chem & Chem Engn, Changsha 410081, Hunan, Peoples R China
来源：
POLYMER DEGRADATION AND STABILITY | 2009年 / 94卷 / 08期
关键词：
Layered double hydroxide; Calcination; Thermogravimetric analysis; Poly(methyl methacrylate); Cone calorimeter; PHYSICOCHEMICAL PROPERTIES; THERMAL-DEGRADATION; NANOCOMPOSITES; POLYSTYRENE; RETARDANCY; POLYETHYLENE; STABILITY;
D O I：
10.1016/j.polymdegradstab.2009.03.023
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 effect of modified layered double hydroxides (LDHs) on fire properties of poly(methyl methacrylate) is investigated. Organically-modified LDHs were prepared via rehydration of calcined hydrotalcite in a palmitate solution. Composites consisting of the organo-LDHs, unmodified hydrotalcite and calcined oxides were prepared with poly(methyl methacrylate) using melt blending. Thermal and fire properties of the (nano)composites were studied. The thermogravimetric analyses of the composites show an increase in thermal stability. Fire performance, evaluated using cone calorimetry, show that organically-modified LDHs composites give the best reductions in peak heat release rate, PHRR, i.e., 51% at 10% weight loading. Dispersion of the LDHs was characterized using transmission electron microscopy and Xray diffraction. Nanocomposite formation was observed with organically-modified LDHs, while the unmodified LDH composites gave only microcomposites. (C) 2009 Elsevier Ltd. All rights reserved.
引用
收藏
页码：1298 / 1306
页数：9
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