In the present study, polystyrene (PS) is chemically modified with diethyl(acryloyloxymethyl)phosphonate (DEAMP) and an N‐containing monomer, selected from different classes of compounds, via a ter‐polymerization route; thus, exploring possible P–N synergistic effects on fire retardance of the base polymer. The successful incorporation of P and N monomeric units is confirmed by Fourier Transform Infrared (FT‐IR), 1H and 31P Nuclear Magnetic Resonance (NMR) spectroscopies. The thermal degradation and combustion attributes of modified polymeric materials are measured using standard techniques, including Thermo‐Gravimetric Analysis (TGA), Differential Scanning Calorimetry (DSC), “bomb” calorimetry, and Pyrolysis Combustion Flow Calorimetry (PCFC). The thermal and combustion studies demonstrate that the thermal stability and combustion characteristics of styrenic polymers are significantly altered by the presence of even nominal amounts of P‐ and N‐containing groups, and in certain cases, synergistic interactions of these groups are also evident. For instance, as revealed by TGA, the extent of char formation, under the oxidative atmosphere, in the prepared ter‐polymers, is enhanced by 16–44%, when compared to the unmodified PS. The heat release rates and heat release capacities of ter‐polymers, measured using the PCFC technique, are reduced by 18–50%, in comparison to the same parameters obtained for the unmodified counterpart.

中文翻译：

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含氮单体对膦酸基化学改性聚苯乙烯热降解和燃烧性能的影响

在本研究中，聚苯乙烯（PS）用（丙烯酰氧基甲基）膦酸二乙酯（DEAMP）和选自不同类别化合物的含氮单体进行化学改性，通过特尔‐聚合路线；因此，探索可能的 P-N 协同效应对基础聚合物的阻燃性。傅里叶变换红外 (FT-IR) 证实了 P 和 N 单体单元的成功掺入，1手31P 核磁共振 (NMR) 波谱。改性聚合物材料的热降解和燃烧属性使用标准技术进行测量，包括热重分析（TGA）、差示扫描量热法（DSC）、“炸弹”量热法和热解燃烧流动量热法（PCFC）。热和燃烧研究表明，即使标称量的含磷和含氮基团的存在，也会显着改变苯乙烯聚合物的热稳定性和燃烧特性，并且在某些情况下，这些基团的协同相互作用也很明显。例如，正如 TGA 所揭示的，在氧化气氛下，所制备的材料中的炭形成程度之三与未改性的 PS 相比，聚合物的性能增强了 16-44%。热释放速率和热释放能力特尔‐与未改性对应物获得的相同参数相比，使用 PCFC 技术测量的聚合物减少了 18-50%。