Linear polymer, polyacrylic acid (PAA), acrylic acid – 2-acrylamido-2-methylpropane sulfonic acid (AA-co-AMPS) copolymers, and comb-like PCE polymers were used to study their dispersing efficiency in fresh cement pastes with emphasing their interactions with Ca²⁺ in solution. Fluidity tests show that PAA exhibits an effective fluidizing effect in MgO and CaCO₃ systems, while it behaves inversely in cement paste despite its significant adsorption amount because of the deleterious bridging effect caused by Ca²⁺ ions in the interstitial solution. Dynamic light scattering measurements reveal that the incorporation of side chains into the PAA backbone inhibits the ion-bridging effect, and the PCE with longer side chain and higher side chain density exhibits stronger tolerance to this effect. Interestingly, the AA-co-AMPS copolymers present strong resistance against the ion-crosslinking effect. This suggests that the highly hydrophilic repeating units may act similarly to the side chains in PCEs concerning providing steric hindrance.

线性聚合物，聚丙烯酸（PAA），丙烯酸– 2-丙烯酰胺基-2-甲基丙烷磺酸（AA-共聚物-AMPS）共聚物和梳状PCE聚合物用于研究其在新鲜水泥浆中的分散效率，并着重于与溶液中的Ca ²⁺相互作用。流动性测试表明，PAA在MgO和CaCO ₃系统中表现出有效的流化作用，尽管由于Ca ²⁺造成的有害桥连作用，尽管吸附量很大，但在水泥浆中却表现出相反的作用。间隙溶液中的离子。动态光散射测量显示，将侧链并入PAA主链会抑制离子桥效应，而具有较长侧链和较高侧链密度的PCE表现出对该作用的较强耐受性。有趣的是，AA-共-AMPS共聚物对离子交联作用具有很强的抵抗力。这表明在提供空间位阻方面，高度亲水的重复单元可能与PCE中的侧链相似。