摘要
以聚（２，４甲苯二己二脲）（ＰＨＵ）、聚（２，４甲苯二乙二脲）（ＰＥＵ）和二苯甲酰己二胺（ＤＢＨ）、二苯甲酰乙二胺（ＤＢＥ）为协效剂，分别与三聚氰胺改性多聚磷酸铵的产物ＭＰＰＡ复配成膨胀型阻燃剂（ＩＦＲ）、它们对提高ＩＦＲ对聚丙烯的阻燃性能都有显著作用，总的效果是ＰＨＵ＞ＤＢＥ＞ＰＥＵ＞ＤＢＨ。虽然协效剂的结构和性质不同，但在各自最佳的ＩＦＲ配方中的氮／磷比值基本不变，为１．６～１．７，热重分析表明ＩＦＲ阻燃作用的提高主要是协效剂在ＭＰＰＡ作用下有效的碳化和成炭，同时也促进了聚丙烯在受热燃烧过程中焦化成炭的结果。
Poly(2,4 tolylene hexamethylene urea)(PHU), poly(2,4 tolylene ethylene urea)(PEU), hexamethylene dibenzoylamide(DBH) and ethylene dibenzoylamide(DBE) were used as synergists and compounded respectively with the melamine modified product of ammonium polyphosphate( MPPA) and thus intumescent flame retardants(IFR) were prepared。It was showed that the synergy of the symergists was significant in increasing the flame retardation of the IFRs on polypropylene and had the order of PHU>PEU >DBE>DBH. The nitrogen/phosphorus ratio for the synergists in their own optimum formula are nearly the same, i.e. 1.6 to 1.7 n spite of their difference in molecular structure and properties. Thermogravimetric analysis revealed that the improvement of flame retardation of the IFRs is mainly the results of the efficient carbonation and charring of the synergists in the presence of MPPA and the scorching of polypropylene promoted by the synergists during heating and burning.
出处
《高分子材料科学与工程》
EI
CAS
CSCD
北大核心
1999年第1期100-103,共4页
Polymer Materials Science & Engineering
基金
广东省自然科学基金
关键词
膨胀型
阻燃剂
协效剂
聚丙烯
碳化
阻燃性
intumescent flame retardant, synergist, flame retardation synergy, polypropylene
