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首页> 外文期刊>Journal of Applied Polymer Science >Preparation and characterization of novel flame retardant (aliphatic phosphate)cyclotriphosphazene-containing polyurethanes
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Preparation and characterization of novel flame retardant (aliphatic phosphate)cyclotriphosphazene-containing polyurethanes

机译：新型含阻燃剂（脂肪族磷酸酯）的环三磷腈的聚氨酯的制备与表征

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摘要

A novel reactive flame retardant, (4-diethoxyphosphoryloxyphenoxy)(4-hydroxyphenoxy)cyclotriphosphazene (EPPZ), was prepared and characterized by FTIR P-31-NMR, and H-1-NMR analyses. Polyurethanes that contain (aliphatic phosphate) cyclotriphosphazene, with various phosphorus contents, were prepared from EPPZ, poly(propylene glycol), 1,4-butanediol, and 2,4-toluene diisocyanate. The polyurethanes were characterized by measurements of FTIR, TGA, DSC, limiting oxygen index (LOI), and tensile testing. The results indicated that the EPPZ-containing polyurethanes prepared in this study have higher glass-transition temperature, higher tensile strength, lower temperature of degradation, and higher char yield residues than those of the pure polyurethane. The activation energies at various degradation stages for the polyurethanes were calculated by Ozawa's method. The LOI of the EPPZ-containing polyurethane was increased with increasing EPPZ content and the polyurethanes showed flame-extinguishable behavior. Moreover, it was found that the effect of the flame retardancy of the polyurethanes took place primarily in the condensed phase. (C) 2003 Wiley Periodicals, Inc. [References: 16]
机译：制备了新型的反应性阻燃剂（4-二乙氧基磷酰氧基苯氧基）（4-羟基苯氧基）环三磷腈（EPPZ），并通过FTIR P-31-NMR和H-1-NMR分析对其进行了表征。由EPPZ，聚（丙二醇），1,4-丁二醇和2,4-甲苯二异氰酸酯制备含磷含量不同的（脂肪族磷酸）环三磷腈的聚氨酯。通过测量FTIR，TGA，DSC，极限氧指数（LOI）和拉伸测试来表征聚氨酯。结果表明，与纯聚氨酯相比，本研究制备的含EPPZ的聚氨酯具有更高的玻璃化转变温度，更高的拉伸强度，更低的降解温度和更高的炭收率残渣。用小泽法计算了聚氨酯在不同降解阶段的活化能。含EPPZ的聚氨酯的LOI随着EPPZ含量的增加而增加，并且聚氨酯表现出可熄灭的行为。此外，发现聚氨酯的阻燃性的影响主要发生在缩合相中。 （C）2003 Wiley Periodicals，Inc. [参考：16]

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