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Material Sciences 2022
聚乙二醇酯功能单体增强聚羧酸减水剂粘土适应性的研究
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Abstract:
本文通过自制一种聚乙二醇酯功能单体(PEGE-FM)并引入聚羧酸减水剂的合成中，利用自由基聚合原理在氧化还原体系中合成了一种抗泥型聚羧酸减水剂(CR-PCE)。利用红外光谱对其进行了结构表征，采用流动度和流变性试验考察CR-PCE的宏观抗泥性能，采用红外光谱、X射线衍射从微观层面研究CR-PCE的抗泥机理。结果表明：PEGE-FM能有效抑制CR-PCE与蒙脱土发生插层吸附，宏观表现为屈服应力和塑性粘度均减小，浆体流动度经时损失率显著降低。
A clay-resistant polycarboxylate superplasticizer (CR-PCE) was synthesized in the redox system based on the principle of free radical polymerization by introducing a polyethylene glycol ester functional monomer (PEGE-FM). The PEGE-FM and CR-PCE samples were characterized by Fourier transform infrared spectrophotometry. The macro clay resistance of CR-PCE was measured by fluidity and rheology test. The micro clay-resistant mechanism was investigated by using Fourier transform infrared spectrophotometry and X-ray diffraction. The results show that PEGE-FM can effectively inhibit the intercalation ad-sorption between CR-PCE and montmorillonite. The yield stress, plastic viscosity, and slurry fluidity loss rate over time are significantly reduced from the macroscopic performance.
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