It is widely recognized that the dispersing ability of polycarboxylate superplasticizers (PCEs) could be hindered due to the presence of clay contaminants in concrete. In this study, a series of allyl ether-based polycarboxylate superplasticizers possessing short polyethylene glycol side chains was successfully synthesized and probed for their clay tolerance. The resulting PCE polymers were characterized via Size Exclusion Chromatography (SEC) to obtain their molecular properties. Thereafter, their dispersing ability was probed in the absence and presence of sodium bentonite. Allyl ether-based polycarboxylate (APEG) polymers possessing short side chains were found to exhibit enhanced clay resistance as compared to that of conventional MPEG PCEs holding long pendant chains. The mode of interaction between APEG PCEs and bentonite was investigated via sorption and XRD measurements. The data revealed that APEG PCEs possessing a lower side chain density intercalate less into the interlayer space of bentonite than those exhibiting higher side chain density.

人们普遍认为，由于混凝土中存在粘土污染物，聚羧酸减水剂 (PCE) 的分散能力可能会受到阻碍。在这项研究中，成功​​合成了一系列具有短聚乙二醇侧链的烯丙基醚基聚羧酸减水剂，并探讨了它们的粘土耐受性。所得的 PCE 聚合物通过尺寸排阻色谱 (SEC) 进行表征，以获得它们的分子特性。此后，在钠膨润土不存在和存在的情况下探测了它们的分散能力。发现具有短侧链的基于烯丙基醚的聚羧酸酯 (APEG) 聚合物与具有长侧链的常规 MPEG PCE 相比表现出增强的耐粘土性。通过吸附和 XRD 测量研究了 APEG PCE 和膨润土之间的相互作用模式。数据显示，与具有较高侧链密度的 APEG PCE 相比，具有较低侧链密度的 APEG PCE 较少地嵌入膨润土的层间空间。