聚氧乙烯醚型高分子阳离子沥青乳化剂的合成与性能

Synthesis and Performance of Polyoxyethylene Ether-Type Polymeric Cationic Asphalt Emulsifier

以过氧化氢异丙苯为引发剂,3-巯基丙酸为链转移剂,采用自由基聚合制备了一种聚氧乙烯醚型高分子阳离子沥青乳化剂(PEAE),探讨了乙二醇单乙烯基聚乙二醇醚(EPEG)用量、单体摩尔比、酸胺摩尔比及引发剂用量对PEAE低温延度的影响,并采用傅里叶变换红外光谱对PEAE的分子结构进行表征,测试了其表面活性及乳化性能.结果表明,PEAE各项指标均符合规范要求,其乳化能力、低温性能及5 d常温储存稳定性优良,属于慢裂型阳离子沥青乳化剂,可有效改善乳化沥青的低温性能,在稀浆封层和微表处等施工中有着良好的应用前景.

A novel polyoxyethylene ether-type polymeric cationic asphalt emulsifier(PEAE)was synthesized by free radical polymerization using cumene hydroperoxide as an initiator and 3-mercaptopropionic acid as a chain transfer agent.The effects of EPEG dosage,monomer molar ratio,acid/amine molar ratio and initiator dosage on the ductility at low temperature of PEAE were discussed.The molecular structure of PEAE was characterized by Fourier transform infrared spectroscopy,and the surface activity and emulsifying properties of PEAE were tested.The results show that all indexes of PEAE can meet the specification requirements.The emulsifying capacity,the low-temperature performance and the storage stability at room temperature(5 days)are excellent.As a slow cracking cationic asphalt emulsifier,PEAE can improve the low-temperature performance of emulsified asphalt,which exhibits a good application prospect in the construction of slurry seal and micro surface.