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Anti-flammability, mechanical and thermal properties of bio-based rigid polyurethane foams with the addition of flame retardants

机译：添加阻燃剂的生物基刚性聚氨酯泡沫的抗易燃性，机械和热性能

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摘要

Adding efficient and environmentally friendly flame retardants to polyurethane foams is the preferable way to improve their flame resistance ability. In this work, bio-based rigid polyurethane foams (RPUFs) were prepared with the addition of dicyclohexyl aluminium hypophosphate (DAH) or aluminium diethyl phosphinate (ADP) as the flame retardant. The mechanical properties, thermal degradation and flammability behavior of the obtained RPUFs were evaluated by means of compressive strength tests, thermogravimetry analysis, vertical burning test and scanning electron microscopes. The characterization results indicate that, with the same content of flame retardant, the compressive strength at the deformation of 10% for each RPUF prepared with the addition of DAH is higher than that of the foams with ADP addition, which fully meets the specifications for building insulation materials. Moreover, the average flame height of each RPUF with the addition of flame retardants is less than 250 mm, whereas the average burning time of RPUF with 15 wt% addition of DAH is only 4.4 s, far less than that (12.5 s) of the foam with the same addition amount of ADP. The RPUFs with DAH addition have the potential advantages for thermal insulation applications in various fields.
机译：向聚氨酯泡沫添加有效和环保的阻燃剂是提高其阻燃能力的优选方法。在这项工作中，使用加入二环己基铝磷酸铝（DAH）或铝亚乙基磷酸铝（ADP）作为阻燃剂来制备生物基刚性聚氨酯泡沫（RPUF）。通过压缩强度试验，热重试验，垂直燃烧试验和扫描电子显微镜评估所得RPUFS的机械性能，热降解和可燃性行为。表征结果表明，通过相同的阻燃剂含量，通过添加DAH制备的每个RPUF的变形的变形抗压强度高于ADP加法的泡沫的变形，这完全符合建筑物的规格绝缘材料。此外，每个RPUF的加入阻燃剂的平均火焰高度小于250mm，而RPUF的平均燃烧时间为15wt％的DAH仅为4.4 s，远小于（12.5秒）泡沫具有相同的ADP添加量。具有DAH的RPUFS在各种领域中具有隔热应用的潜在优势。

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  • 来源
    《RSC Advances》 |2020年第53期|共6页
  • 作者

    Zhang Guangyu; Lin Xiaoqi; Zhang Qinqin; Jiang Kaisen; Chen Weisheng; Han Dezhi;

  • 作者单位

    Qingdao Univ Sci &

    Technol Coll Chem Engn State Key Lab Base Ecochem Engn Qingdao 266042 Peoples R China;

    Qingdao Univ Sci &

    Technol Coll Marine Sci &

    Biol Engn Shandong Prov Key Lab Biochem Engn Qingdao 266042 Peoples R China;

    Qingdao Univ Sci &

    Technol Coll Marine Sci &

    Biol Engn Shandong Prov Key Lab Biochem Engn Qingdao 266042 Peoples R China;

    Qingdao Univ Sci &

    Technol Coll Marine Sci &

    Biol Engn Shandong Prov Key Lab Biochem Engn Qingdao 266042 Peoples R China;

    Qingdao Univ Sci &

    Technol Coll Marine Sci &

    Biol Engn Shandong Prov Key Lab Biochem Engn Qingdao 266042 Peoples R China;

    Qingdao Univ Sci &

    Technol Coll Chem Engn State Key Lab Base Ecochem Engn Qingdao 266042 Peoples R China;

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  • 正文语种 eng
  • 中图分类 化学;
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