机械力化学制备锡酸锌及其在PVC中的阻燃应用

Abstract

Abstract:

Zinc stannate（ZS） was prepared by mechanical force chemical wet ball milling using tin dioxide（SnO₂） and zinc oxide（ZnO） as raw materials,and then zinc stannate modified hydrotalcite（ZS/HT） was obtained by mixed with hydrotalcite in a certain ratio.The synthesized ZS and ZS/HT were characterized by scanning electron microscopy,X-ray diffraction and transmission electron microscopy.The obtained ZS/HT was applied to PVC to obtain flame-retardant PVC.When 10%（mass ratio of ZS to hydrotalcite） ZS/HT was added,the limiting oxygen index of the material was 3.5% higher than that of the pure PVC sample,and the mechanical properties of the material were improved.Thermogravimetric analysis results showed that the addition of ZS/HT promoted the early decomposition of PVC to form char layer,which effectively increased the amount of char residue in PVC materials.

Key words: mechanical chemistry, zinc stannate, hydrotalcite, flame retardant agent, PVC

CLC Number:

TQ132.41

Li Jiekang,Xie Jixing. Mechano-chemical preparation of zinc stannate and its flame-retardant application in PVC[J]. Inorganic Chemicals Industry, 2019, 51(5): 33-37.

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References 14

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样品编号	阻燃剂种类	LOI/%	拉伸强度/MPa	断裂伸长率/%
PVC-0	—	29.0	25.10±0.6	309.55±10.7
PVC-1	ZS	38.4	26.38±0.5	320.32±7.0
PVC-2	氧化物	36.2	24.80±0.1	349.12±10.1
PVC-3	HT	29.2	26.31±0.8	292.17±8.5
PVC-4	5% ZS/HT	32.4	25.44±0.4	298.43±6.5
PVC-5	10% ZS/HT	32.5	25.21±0.7	312.79±6.6
PVC-6	15% ZS/HT	33.0	25.67±0.7	309.03±2.5
PVC-7	20% ZS/HT	33.3	24.98±0.4	308.80±10.4

样品编号	T_onset/℃	T_max1/℃	T_max2/℃	T_max3/℃	W_{800 ℃} /%
PVC-0	260.7	305.9	455.6	569.9	0.81
PVC-1	247.6	249.5	448.8	606.7	5.40
PVC-3	255.4	301.5	448.6	575.4	7.26
PVC-5	252.7	256.2	470.9	565.8	5.96

National Inorganic Salts Information Center

Inorganic Acid-Base-Salt Committee of CIESC

Mechano-chemical preparation of zinc stannate and its flame-retardant application in PVC

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