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Thermal properties of side-chain phosphorus-containing epoxide cured with amine

机译：胺固化的侧链含磷环氧化物的热学性质

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Glycidyloxy diphenylphosphine oxide (GDPPO), a side-chain phosphorus-containing monoepoxide, was prepared. The compound, GDPPO, was mixed with 4,4'-diglycidylether of bisphenol A-type epoxy resin, DER 331. The reaction kinetics of the mixture, GDPPO-DER 331, cured with diethyltriamine (DETA), and the thermal decomposition properties of the thermosets were studied. For the GDPPO-DER 331-DETA curing systems, it was found that the activation energy of the curing reaction is 45.0 kJ/mol for the GDPPO-DETA system, and it decreases with the content of GDPPO. According to the method of Ozawa, the average apparent thermal decomposition activation energies of the thermosets with phosphorus-containing monoepoxide are from 138.5 to 178.1 kJ/mol, which are higher than that of the DER 331-DETA system (95.8 kJ/mol). However, the lower crosslinking density and gel fraction of the system with the phosphorus-containing monoepoxide, GDPPO, result in poor protection of the intumescent char during thermal decomposition; thus, the char yield and limiting oxygen index (LOI) of the cured specimens decrease with increasing GDPPO. (C) 2002 John Wiley Sons, Inc. [References: 23]
机译：制备了缩水甘油氧基二苯膦氧化物（GDPPO），一种侧链含磷的单环氧化物。将化合物GDPPO与双酚A型环氧树脂DER 331的4,4'-二缩水甘油醚混合。该混合物的反应动力学GDPPO-DER 331用二乙基三胺（DETA）固化，并且其热分解特性为研究了热固性塑料。对于GDPPO-DER 331-DETA固化体系，发现固化反应的活化能对于GDPPO-DETA体系为45.0 kJ / mol，并且随GDPPO含量的增加而降低。根据Ozawa的方法，含磷单环氧化物的热固性塑料的平均表观热分解活化能为138.5至178.1 kJ / mol，高于DER 331-DETA系统的热分解活化能（95.8 kJ / mol）。然而，含磷单环氧化物GDPPO的体系较低的交联密度和凝胶分数导致在热分解过程中对膨胀性炭的保护不佳。因此，随着GDPPO的增加，固化样品的焦炭产量和极限氧指数（LOI）降低。 （C）2002 John Wiley Sons，Inc. [参考：23]

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