低敏感型混凝土黏度改性剂的合成及性能研究

Study on synthesis and properties of low sensitivity concrete viscosity modifier

基于分子结构设计原理,以丙烯酸、丙烯酰胺、HPEG为主要单体,通过常温水溶液聚合法合成能与聚羧酸减水剂复配的低敏感型混凝土黏度改性剂(UC-01),采用IR表征聚合产物的特征官能团,通过实验分析各工艺参数对产物性能的影响规律。结果表明,当酸醚质量比为5∶25、AM用量为单体总质量的30%、引发剂和链转移剂用量均为单体总质量的2%时,所合成的UC-01具有更好的增黏性能和较低的掺量敏感性。

Based on the principle of molecular structure design,using acrylic acid,acrylamide,HPEG as the main monomers,a low sensitivity concrete viscosity modifier(UC-01)was synthesized by the aqueous solution polymerization method at room temperature,which can be compounded with polycarboxylate superplasticizer.Functional groups of this polymer were demonstrated by IR,and the effect of each process parameters to the performance was also analyzed by a set of experiments.It is shown that the UC-01 has better viscosity-increasing performance and lower dosage sensitivity when the mass ratio of acid and ether is 5∶25 and the mass percent of AM,initiator and chain transfer agent is 30%,2%and 2%respectively.