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首页> 外文OA文献 >Impact of halogen-free flame retardant with varied phosphorus´s chemical surrounding on the properties of diglycidyl ether of bisphenol-A type epoxy resin: synthesis, fire behaviour, flame-retardant mechanism and mechanical properties
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Impact of halogen-free flame retardant with varied phosphorus´s chemical surrounding on the properties of diglycidyl ether of bisphenol-A type epoxy resin: synthesis, fire behaviour, flame-retardant mechanism and mechanical properties

机译：含磷不同化学环境的无卤阻燃剂对双酚A型环氧树脂二缩水甘油醚性能的影响：合成，防火性能，阻燃机理和机械性能

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This work aimed to investigate the effect of two types of phosphorus-containing flame retardants (P-FRs) with different chemical surroundings (phenylphosphonate-based (PO?Ph) and phenylphosphoric-based (PO?OPh)) on the flame-retardant efficiency for diglycidyl ester of bisphenol-A type epoxy (EP) resin. The two series of P-FRs which were named as FPx and FPOx (x = 1, 2 and 3), respectively, showed reactivity with epoxy group that was examined by differential scanning calorimetry (DSC) and variable temperature FTIR spectroscopy (VT-FTIR). A comparative study between the FPx and FPOx (x = 1, 2 and 3) containing flame-retardant epoxy was carried out via investigating their flammability, thermal stability and mechanical properties. The most significant difference in flame retardancy between them was that FPx (x = 1, 2 and 3) endowed EP with a V-0 rating in UL 94 test at 5 wt% loading, while FPOx (x = 1, 2 and 3) showed no rating at such loading. Importantly, it is found that there was almost 10 times difference in the flame-retardant efficiency for EP between FPx and FPOx, though they had similar chemically molecular structures. Moreover, TGA-FTIR and TGA-MS coupling techniques (TGA, thermogravimetric analysis; MS, mass spectroscopy) were employed to study the thermal decomposition of FP1 and FPO1; the impacts of FP1 and FPO1 on the thermal decomposition of EP were studied by TGA-FTIR as well. Furthermore, an online temperature detection experiment was designed to collect the temperatures by thermocouples and infrared thermometers in the UL 94 test. Based on the above results, the flame-retardant mechanisms of FP1 and FPO1 in EP are discussed. In addition, the impact of P-FRs on mechanical properties of EP was studied by means of tensile test and dynamic mechanical analysis.
机译：这项工作旨在研究两种具有不同化学环境的含磷阻燃剂（P-FRs）（基于苯基膦酸酯的（PO？Ph）和基于苯基磷酸酯的（PO？OPh））对阻燃效率的影响用于双酚A型环氧（EP）树脂的二缩水甘油酯。分别命名为FPx和FPOx（x = 1、2和3）的两个P-FR系列显示与环氧基的反应性，通过差示扫描量热法（DSC）和可变温度FTIR光谱仪（VT-FTIR）进行了检查）。通过研究阻燃剂FPx和FPOx（x = 1、2和3）的可燃性，热稳定性和机械性能，进行了比较研究。它们之间最大的阻燃性差异是FPx（x = 1、2和3）在5重量％负载下在UL 94测试中赋予EP的V-0等级，而FPOx（x = 1、2和3）在这种负载下没有显示任何评级。重要的是，发现FPx和FPOx的EP阻燃效率几乎相差10倍，尽管它们的化学分子结构相似。此外，采用TGA-FTIR和TGA-MS偶联技术（TGA，热重分析； MS，质谱）研究了FP1和FPO1的热分解。用TGA-FTIR研究了FP1和FPO1对EP热分解的影响。此外，在UL 94测试中，设计了在线温度检测实验，以通过热电偶和红外温度计收集温度。基于以上结果，讨论了EP中FP1和FPO1的阻燃机理。此外，还通过拉伸试验和动态力学分析研究了P-FRs对EP力学性能的影响。

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