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首页> 外文期刊>RSC Advances >Thermal and flame retardant properties of transparent UV-curing epoxy acrylate coatings with POSS-based phosphonate acrylate
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Thermal and flame retardant properties of transparent UV-curing epoxy acrylate coatings with POSS-based phosphonate acrylate

机译：POSS基膦酸酯丙烯酸酯的透明紫外线固化环氧丙烯酸酯涂料的热和阻燃性能

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摘要

A novel branched phosphonate acrylate monomer (BPA) containing phosphorus and polyhedral oligomeric silsesquioxanes (POSS) was successfully synthesized via thiol Michael addition of tri(acryloyloxyethyl) phosphate with octamercaptopropyl POSS, and then incorporated into epoxy acrylate (EA) resins in different ratios using ultraviolet curing technology. The structure of BPA was confirmed by Fourier transform infrared spectroscopy (FTIR) and nuclear magnetic resonance. The effects of BPA on the thermal stability, combustion performance, degradation process and transparency of EA were investigated. The modified EA (MEA) retained a high transparency and exhibited significantly enhanced flame retardancy, as evidenced by the increased limiting oxygen index values and greatly reduced peak heat release rate. The thermal properties of MEA indicated that the presence of BPA promoted the degradation of the EA matrix and produced additional char residues. The thermal degradation processes of the MEA were further investigated by real time FTIR. The char structure of MEA, investigated by Raman spectra, revealed that the addition of BPA increased the ratios of graphitized carbon in residual chars, thus enhancing the thermal stability of MEA.
机译：新型的含磷和多面体低聚倍半硅氧烷（POSS）的新型支链膦酸酯丙烯酸酯单体（BPA）是通过硫醇迈克尔加成的三（丙烯酰氧基乙基）磷酸酯与八巯丙基丙基POSS合成的，然后通过紫外线以不同比例掺入环氧丙烯酸酯（EA）树脂固化技术。 BPA的结构通过傅立叶变换红外光谱（FTIR）和核磁共振证实。研究了双酚A对EA的热稳定性，燃烧性能，降解过程和透明性的影响。改性的EA（MEA）保持了高透明性，并显着增强了阻燃性，这可以通过增加极限氧指数值和大大降低峰值放热率来证明。 MEA的热性能表明，BPA的存在促进了EA基质的降解并产生了额外的炭渣。通过实时FTIR进一步研究了MEA的热降解过程。通过拉曼光谱研究发现，MEA的炭结构表明，BPA的加入增加了残余炭中石墨化碳的比例，从而增强了MEA的热稳定性。

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