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首页> 外文期刊>Polymers for advanced technologies >Microencapsulated ammonium polyphosphate with urea-melamine-formaldehyde shell: preparation, characterization, and its flame retardance in polypropylene
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Microencapsulated ammonium polyphosphate with urea-melamine-formaldehyde shell: preparation, characterization, and its flame retardance in polypropylene

机译：脲-三聚氰胺-甲醛壳微胶囊化聚磷酸铵：聚丙烯的制备，表征及其阻燃性能

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摘要

Microencapsulated ammonium polyphosphate (MCU-APP) with urea-melamine-formaldehyde (UMF) resin is prepared by in situ polymerization, and is characterized by FTIR and XPS. The microencapsulation of APP with the UMF resin leads to a decrease in the particle's water solubility. The flame retardant actions of MCU-APP and APP in PP are studied using limiting oxygen index (LOI) and UL-94 test, and their thermal stability is evaluated by thermogravimetric analysis. It is found that the LOI value of the PP/MCU-APP composite is higher than the value of the PP/APP composite. In comparison with the PP/MCU-APP composites, the LOI values of the PP/MCU-APP/DPER ternary composites at the same additive loading increase, and UL-94 ratings of most ternary composites are raised to V-0. The water-resistant properties of the PP composites containing APP and MCU-APP are studied. Moreover, the combustion behavior of the PP composites is investigated by the cone calorimeter.
机译：通过原位聚合制备具有尿素-三聚氰胺-甲醛（UMF）树脂的微囊化聚磷酸铵（MCU-APP），并通过FTIR和XPS对其进行表征。用UMF树脂将APP微囊化会导致颗粒的水溶性降低。通过极限氧指数（LOI）和UL-94试验研究了MCU-APP和APP在PP中的阻燃作用，并通过热重分析评估了它们的热稳定性。发现PP / MCU-APP复合材料的LOI值高于PP / APP复合材料的LOI值。与PP / MCU-APP复合材料相比，PP / MCU-APP / DPER三元复合材料在相同添加量下的LOI值增加，大多数三元复合材料的UL-94等级提高至V-0。研究了含APP和MCU-APP的PP复合材料的耐水性能。此外，通过锥形量热仪研究了PP复合材料的燃烧行为。

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