中国塑料 ›› 2017, Vol. 31 ›› Issue (10): 33-39.DOI: 10.19491/j.issn.1001-9278.2017.10.006

• 材料与性能 • 上一篇    下一篇

过渡金属植酸盐的制备及其在PVC中的阻燃应用

程路瑶1,武伟红2,孟伟华1,许硕1,屈红强1,徐建中3   

  1. 1. 河北大学,化学与环境科学学院
    2. 河北农业大学理学院
    3. 河北大学
  • 收稿日期:2017-06-02 修回日期:2017-07-03 出版日期:2017-10-26 发布日期:2017-10-25

Synthesis of Transition Metallic Phytates and Its Applications in PVC as an Efficient Flame Retardant

  • Received:2017-06-02 Revised:2017-07-03 Online:2017-10-26 Published:2017-10-25

摘要: 采用直接沉淀法制备了Mn2+、Fe3+、Co2+、Ni2+ 4种过渡金属的植酸盐(M-Phyt),并将其作为阻燃剂用于软质聚氯乙烯(PVC)的阻燃消烟处理。结果表明,所合成的M-Phyt颗粒呈不规则形状;在N2气氛下,4种阻燃剂的残炭量顺序为Mn-Phyt>Co-Phyt>Fe-Phyt>Ni-Phyt;阻燃剂添加量为15 %(质量分数,下同)时,PVC/Co-Phyt复合材料的极限氧指数测试效果最好,极限氧指数从24.9 %提高到了28.3 %,烟密度等级达到了75.09 %;PVC/Fe-Phyt复合材料的抑烟效果最好,SDR从94.55 %降低到了48.96 %,其极限氧指数为27.7 %;加入植酸盐后,复合材料的残炭量都大幅度提高,PVC/Co-Phyt复合材料的残炭量高达22.08 %,PVC/Ni-Phyt复合材料的残炭量也提高了9.09 %。

Abstract: Transition metallic phytates (M-Phyt) containing different rare earth elements were synthesized by a direct precipitation method, and then it was used as a flameretardant and smoke suppressant for flexible PVC. It indicated that the prepared MPhyt particles exhibited an irregular shape. Char yields of M-Phyt in nitrogen were in an order of Mn-Phyt>Co-Phyt>Fe-Phyt>Ni-Phyt. PVC compound containing 15 wt % CoPhyt showed the highest LOI, which was improved from 24.9 % to 28.3 %, and its SDR reached 75.09 %. Fe-Phyt exhibited an optimum smoke suppression effect on PVC by reducing SDR of PVC/Fe-Phyt compound from 94.55 % to 48.96 %, and LOI of PVC/Fe-Phyt compound was 27.7 %. Char yields of the compounds were greatly improved with the addition of MPhyt. Char yield of PVC/Co-Phyt composite was as high as 22.08 wt %, but char yield of PVC/Ni-Phyt composite increased by 9.09 %.