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首页> 外文期刊>Polymers for advanced technologies >Microencapsulated ammonium polyphosphate with polyurethane shell: preparation, characterization, and its flame retardance in polyurethane
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Microencapsulated ammonium polyphosphate with polyurethane shell: preparation, characterization, and its flame retardance in polyurethane

机译：聚氨酯壳微胶囊化聚磷酸铵：制备，表征及其在聚氨酯中的阻燃性

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摘要

A series of polyurethane (PU) microencapsulated ammonium polyphosphate (MCAPP) were prepared by in situ polymerization from toluene-2,4-diisocyanate (TDI), polyethylene glycol (PEG), and pentaerythtritol (PER). And the structure was characterized by Fourier transform infrared spectroscopy (FTIR) and X-ray photoelectron spectroscopy (XPS). Then it chose the optimal PEG constituent to design microcapsule from scanning electron microscopy (SEM) and water solubility test. The combustion and thermal degradation behaviors of PU blended APP or MCAPP were investigated by thermogravimetric analysis (TGA), UL-94 test, and microcombustion calorimetry. The results showed that the PU/MCAPP had better thermal stability and flame retardance, due to the stable char forming by APP and PU shell. Moreover, the water resistance of flame retarded PU composite was greatly improved.
机译：通过原位聚合由甲苯-2,4-二异氰酸酯（TDI），聚乙二醇（PEG）和季戊四醇（PER）制备了一系列聚氨酯（PU）微囊化多磷酸铵（MCAPP）。并通过傅里叶变换红外光谱（FTIR）和X射线光电子能谱（XPS）对结构进行了表征。然后通过扫描电子显微镜（SEM）和水溶性测试，选择最佳的PEG成分设计微胶囊。通过热重分析（TGA），UL-94测试和微燃烧量热法研究了PU混合APP或MCAPP的燃烧和热降解行为。结果表明，由于APP和PU壳形成稳定的炭，PU / MCAPP具有较好的热稳定性和阻燃性。此外，阻燃PU复合材料的耐水性得到了极大的提高。

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