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首页> 外文期刊>Journal of Applied Polymer Science >Thermal decomposition of cyclotriphosphazenes .1. Alkyl-aminoaryl ethers
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Thermal decomposition of cyclotriphosphazenes .1. Alkyl-aminoaryl ethers

机译：环三磷腈的热分解.1。烷基氨基芳基醚

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1,3,5-Triisopropoxy-1,3,5-tris(4-aminophenoxy)-cyclotriphosphazene-1,3,5-t rineopentoxy-1,3,5-tris(4-aminophenoxy)-cyclotriphosphazene [CTP (II)], and 1,1,3,5-tetraneopentoxy-3,5-bis(4-aminophenoxy)-cyclotriphosphazene [CTP(III)] were prepared from hexachlorotricylophosphazene. Thermal decomposition of the crude CTP (I), CTP (II), and CTP (III) was studied by thermogravimetry, differential scanning calorimetry, and thermal volatilization analysis. Solid, gaseous, and high boiling degradation products were collected at different steps of thermal decomposition and identified by using infrared and gas chromatography mass spectrometry. On heating to 600 degrees C, CTP (I) shows three main steps of weight loss, whereas both CTP (II) and CTP (III) show two overlapping steps. The first step of thermal decomposition of CTP (I) is observed at 150-200 degrees C, where elimination of part of the aliphatic substituents and polymerization of the CTP ( I) occurs. The opening of tricyclophosphazene rings at 220-370 degrees C provokes further elimination of aliphatics and ammonia and formation of crosslinked structures. Phosphorus oxynitride structure bonded with carbonized polyaromatics is formed in the third step of thermal decomposition, accompanied by the elimination of aromatics and chain fragments at 400-500 degrees C. In the case of CTP (II) and (III), simultaneous evaporation of virgin CTPs, opening of the phosphazene ring, and elimination of aliphatic substituents with the formation of crosslinked polymeric structures occur at 210-350 degrees C. A phosphorus oxynitride-aromatic carbonized structure similar to that from CTP (I) is formed at 350-600 degrees C. The process is accompanied by the elimination of aromatics and chain fragments. (C) 1998 John Wiley & Sons, Inc. [References: 34]
机译：1,3,5-三异丙氧基-1,3,5-三（4-氨基苯氧基）-环三磷腈-1,3,5-t氰基戊氧基-1,3,5-三（4-氨基苯氧基）-环三磷腈[CTP（II ）]和1,1,3,5-四戊氧基-3,5-双（4-氨基苯氧基）-环三磷腈[CTP（III）]是由六氯三磷腈制备的。通过热重分析，差示扫描量热法和热挥发分析研究了粗制CTP（I），CTP（II）和CTP（III）的热分解。在热分解的不同步骤收集固体，气体和高沸点降解产物，并通过红外和气相色谱质谱法进行鉴定。加热到600摄氏度时，CTP（I）显示出减肥的三个主要步骤，而CTP（II）和CTP（III）则显示出两个重叠的步骤。在150-200摄氏度下观察到CTP（I）热分解的第一步，其中部分脂肪族取代基的消除和CTP（I）的聚合发生。三环磷腈环在220-370摄氏度的开度引发了脂肪族化合物和氨的进一步消除以及交联结构的形成。在热分解的第三步中，形成了与碳化的聚芳族化合物键合的氧氮化磷结构，同时在400-500摄氏度下消除了芳族化合物和链段。在CTP（II）和（III）的情况下，同时蒸发了原生质CTP，磷腈环的打开以及在形成交联聚合物结构时消除脂肪族取代基的过程在210-350摄氏度下发生。类似于CTP（I）的氮氧化磷-芳族碳化结构在350-600摄氏度下形成C.该过程伴随着消除芳族化合物和链片段。 （C）1998 John Wiley＆Sons，Inc. [参考：34]

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