Using cone calorimeter to study thermal degradation of flexible PVC filled with zinc ferrite and Mg(OH)2

被引:32
|
作者
Qu, Hongqiang [1 ]
Liu, Caihong [1 ]
Wu, Weihong [2 ]
Chen, Lingzhi [1 ]
Xu, Jianzhong [1 ]
机构
[1] Hebei Univ, Coll Chem & Environm Sci, Baoding 071002, Hebei, Peoples R China
[2] Agr Univ Hebei, Coll Sci, Baoding 071000, Peoples R China
关键词
Poly(vinyl chloride); Mg(OH)(2); ZnFe2O4; Thermal analysis; Cone calorimeter; POLY(VINYL CHLORIDE); SMOKE-SUPPRESSION; FLAME-RETARDANT; HEAT-FLUX; DECOMPOSITION; ADDITIVES; EMISSION; BEHAVIOR; HALOGEN; CABLE;
D O I
10.1007/s10973-013-3434-3
中图分类号
O414.1 [热力学];
学科分类号
摘要
Flame-retarded poly(vinyl chloride) (PVC) materials have been prepared by using zinc ferrite (ZnFe2O4 (ZFO)) combined with magnesium hydroxide (Mg(OH)(2) (MH)). The effects of these additives on the combustion and thermal degradation of PVC samples were studied using the limiting oxygen index test, the smoke density rating test, thermogravimetric-differential thermogravimetry, and the cone calorimeter test. The results showed that ZFO and MH were good synergists for improving the flame retardancy and smoke-suppressing of PVC/MH/ZFO blends. ZFO can significantly improve the maximum mass loss velocity in the first stage, and reduce the initial decomposition temperature and the decomposition range in the PVC/MH/ZFO blends. The char yield at 700 A degrees C of flame-retarded PVC clearly decreased below theoretical values due to the cationic cracking reactions in the presence of ZFO. Furthermore, the PVC/10MH/10ZFO showed strong flame-retarding synergism since the decreased average heat release rate value. And the PVC/19MH/1ZFO presented a significant smoke-suppressing effect by the least average specific extinction area, peak smoke production rate, and total smoke produce. Moreover, the CO and CO2 production was increased because of a large amount of fragment of char residue in contact air in the presence of ZFO.
引用
收藏
页码:1081 / 1087
页数:7
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