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首页> 外文期刊>Journal of Applied Polymer Science >Flame-retardant expandable polystyrene foams coated with ethanediol-modified melamine-formaldehyde resin and microencapsulated ammonium polyphosphate
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Flame-retardant expandable polystyrene foams coated with ethanediol-modified melamine-formaldehyde resin and microencapsulated ammonium polyphosphate

机译：涂有乙二醇改性的三聚氰胺 - 甲醛树脂和微胶囊化铵多磷酸二磷酸二磷酸酯的阻燃剂可膨胀聚苯乙烯泡沫

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摘要

Melamine-formaldehyde resin was modified by ethylene glycol to decrease the amount of free formaldehyde and extend the storage time. The modified resin (EMF) was further used to prepare microencapsulated ammonium polyphosphate (MCAPP). The structures of both EMF and MCAPP were well characterized. Afterward, EMF and MCAPP were mixed and coated on the surface of pre-expanded polystyrene particles to prepare flame-retardant expandable polystyrene foams (EPS). Both water resistance and impact strength were enhanced by the presence of MCAPP, and the flammability of the samples was also significantly improved. For the sample containing 75 phr MCAPP, the limiting oxygen index value was increased to 31.4% with a V-0 rating in the UL-94 vertical burning test. Cone calorimeter tests showed that the peak heat release rate of the sample declined sharply to 172.7 kW/m(2), which is 81.6% lower than that of neat EPS. The smoke production of EPS foams during combustion was suppressed by the presence of MCAPP, and the thermal stability was also improved. Scanning electron microscopy showed that the char layer of the flame-retardant sample after combustion became compact with negligible voids or cracks, which could further form an isolation barrier to prevent both heat and flame transfer. (C) 2018 Wiley Periodicals, Inc.
机译：通过乙二醇改性三聚氰胺 - 甲醛树脂，降低游离甲醛的量并延长储存时间。改性树脂（EMF）还用于制备微胶囊化的多磷酸铵（MCAPP）。 EMF和MCAPP的结构很好地表征。然后，将EMF和MCAPP混合并涂覆在预膨胀的聚苯乙烯颗粒表面上，以制备阻燃膨胀聚苯乙烯泡沫（EPS）。通过MCAPP的存在增强了耐水性和冲击强度，并且样品的可燃性也显着改善。对于含有75phrmApp的样品，UL-94垂直燃烧试验中的V-0评级将限制氧指数值增加到31.4％。锥形量热计测试表明，样品的峰值热释放速率急剧下降至172.7 kW / m（2），其比整齐EPS低81.6％。通过MCAPP的存在抑制了燃烧过程中EPS泡沫的烟雾产生，并且还改善了热稳定性。扫描电子显微镜表明，燃烧后阻燃样品的炭层变得紧凑，空隙或裂缝可进一步形成分离屏障，以防止热量和火焰转移。 （c）2018 Wiley期刊，Inc。

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  • 来源
    《Journal of Applied Polymer Science》 |2018年第28期|共8页
  • 作者

    Zhang Sheng; Ji Wenfei; Han Yi; Gu Xiaoyu; Li Hongfei; Sun Jun;

  • 作者单位

    Beijing Univ Chem Technol State Key Lab Organ Inorgan Composites Beijing 100029 Peoples R China;

    Beijing Univ Chem Technol State Key Lab Organ Inorgan Composites Beijing 100029 Peoples R China;

    Beijing Univ Chem Technol State Key Lab Organ Inorgan Composites Beijing 100029 Peoples R China;

    Beijing Univ Chem Technol State Key Lab Organ Inorgan Composites Beijing 100029 Peoples R China;

    Beijing Univ Chem Technol Beijing Key Lab Adv Funct Polymer Composites Beijing 100029 Peoples R China;

    Beijing Univ Chem Technol State Key Lab Organ Inorgan Composites Beijing 100029 Peoples R China;

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  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类 高分子化合物工业（高聚物工业）;
  • 关键词

    coatings; foams; polystyrene; resins; thermal properties;

    机译：涂料;泡沫;聚苯乙烯;树脂;热性质;

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