一类阴离子型高分子沥青乳化剂的合成及乳化沥青的性能

Synthesis of a Kind Anionic Polymer Emulsifier and the Performance of Their Emulsified Asphalt

以丙三醇与十一烯酸和油酸为原料,制备了聚(2-十一烯甘油酯)二羧酸钠和聚(2-油酸甘油酯)二羧酸钠两种阴离子型高分子沥青乳化剂。采用红外光谱、近红外和核磁对样品结构予以鉴定,通过凝胶渗透色谱仪对其-Mn进行测定,分别进行硬水稳定性、拌合稳定度和其他国家标准的测试,并对它们的乳化机理进行分析。结果表明,合成物质为目标产物;-Mn分别为3200 g/mol和4100 g/mol;硬水稳定性分别为4级和3级;二者均为慢裂型沥青乳化剂;由于分子结构中亲水基含有大量氧原子,在乳化沥青中与水分子形成大量氢键使乳化沥青稳定。

Glycerol for matrix surface active monomer polymerization was used to synthesize two new anionic polymer asphalt emulsifier, poly （2-glyceryl undecylenate） dicarboxylate and poly （2-glyceryl oleate） dicarboxylate. Using infrared spectroscopy （IR）, near-infrared （NIR） analysis and I H nuclear magnetic resonance （1H-NMR）, the structures of sample were identified. -Mn were got from gel permeation chromatography （GPC）. The stability of the hard water, mixing stability and other tests were conducted respectively. And the mechanism of emulsification was studied. The results show that： the synthetic material is target product, which has good hard water stability. And both of them are slow crack asphalt emulsifier. The hydrogen bonds are formed between ester in molecular and hydroxyl in asphaltene, as well as the oxygen in carboxyl ions and water molecules, resulting stabilize asphalt emulsion.