The Effects of Nitrogen-Containing Monomers on the Thermal Degradation and Combustion Attributes of Polystyrenes Chemically Modified With Phosphonate Groups
IF 4.2 3区 材料科学Q2 MATERIALS SCIENCE, MULTIDISCIPLINARY
Aloshy Baby, Svetlana Tretsiakova-McNally, Paul Joseph, Jianping Zhang, Malavika Arun
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引用次数: 0
Abstract
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.
在本研究中,聚苯乙烯(PS)与二乙基(丙烯酰氧甲基)膦酸盐(DEAMP)和含 N 的单体通过三元聚合途径进行化学改性,这些单体选自不同类别的化合物,从而探索 P-N 对基础聚合物阻燃性可能产生的协同效应。傅立叶变换红外(FT-IR)、1H 和 31P 核磁共振(NMR)光谱证实了 P 和 N 单体单元的成功结合。改性聚合物材料的热降解和燃烧属性采用标准技术进行测量,包括热重分析法(TGA)、差示扫描量热法(DSC)、"炸弹 "量热法和热解燃烧流式量热法(PCFC)。热学和燃烧研究表明,苯乙烯聚合物的热稳定性和燃烧特性会因含有即使是标称量的含 P 和 N 基团而发生显著变化,在某些情况下,这些基团的协同作用也很明显。例如,正如热重分析(TGA)所显示的,与未改性 PS 相比,制备的三元共聚物在氧化气氛下的成炭程度提高了 16-44%。使用 PCFC 技术测量的三元共聚物的热释放率和热释放能力与未改性聚苯乙烯的相同参数相比降低了 18-50%。
期刊介绍:
Macromolecular Materials and Engineering is the high-quality polymer science journal dedicated to the design, modification, characterization, processing and application of advanced polymeric materials, including membranes, sensors, sustainability, composites, fibers, foams, 3D printing, actuators as well as energy and electronic applications.
Macromolecular Materials and Engineering is among the top journals publishing original research in polymer science.
The journal presents strictly peer-reviewed Research Articles, Reviews, Perspectives and Comments.
ISSN: 1438-7492 (print). 1439-2054 (online).
Readership:Polymer scientists, chemists, physicists, materials scientists, engineers
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