无机阻燃改性沥青结构表征及阻燃机理研究

发布时间：2018-12-27 20:39

【摘要】：针对目前某些阻燃剂发烟量大、有毒和成本较高问题,研发了两种新型无机阻燃剂,并制备了无机阻燃改性沥青;借助扫描电镜(SEM)实验和红外光谱(FT-IR)实验,探究了两种阻燃剂与沥青的结合状况以及二者对沥青官能团的影响;通过热重(TG)实验,分析了两种阻燃剂对沥青燃烧过程中热失重变化的影响,探究了两种阻燃改性沥青的作用机理。结果表明,两种新型无机阻燃沥青性能良好;无机阻燃剂颗粒可均匀地分布在沥青中,没有团聚现象,两种阻燃剂各颗粒与沥青具有良好的粘结性;两种新型阻燃剂加入到沥青中,未与沥青形成新的共价键;燃烧过程中无机阻燃改性沥青的热失重大于基础沥青,无机阻燃沥青主要凭借阻燃剂的结合水分挥发以及金属化合物烧结覆盖作用发挥阻燃作用。
[Abstract]:In order to solve the problems of high smoke emission, toxicity and high cost of some flame retardants, two new inorganic flame retardants were developed, and inorganic flame retardant modified asphalt was prepared. By means of scanning electron microscope (SEM) and infrared spectroscopy (FT-IR) experiments, the combination of two flame retardants with asphalt and their effects on the functional groups of asphalt were investigated. The effects of two flame retardants on the thermogravimetric change of asphalt during combustion were analyzed by thermogravimetric (TG) test, and the mechanism of the two kinds of flame retardant modified asphalt was explored. The results show that the two new inorganic flame retardant asphalts have good properties, inorganic flame retardant particles can be uniformly distributed in the asphalt, there is no agglomeration, and each particle of the two flame retardants has good adhesion to the asphalt. Two new flame retardants were added to the asphalt without forming a new covalent bond with the asphalt. The thermogravimetric loss of inorganic flame retardant modified asphalt is larger than that of base asphalt during combustion. Inorganic flame retardant asphalt plays a flame-retardant role mainly by the combined moisture volatilization of flame retardants and the sintering of metal compounds.
【作者单位】：长安大学公路学院;天津市市政工程设计研究院;
【基金】：国家自然科学基金资助项目(51208045) 高等学校博士学科点专项科研基金资助项目(20110205120007) 中央高校基本科研业务费专项资金资助项目(2014G2210002) 天津市市政工程管理局科技资助项目(2012-23)
【分类号】：U414

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