Abstract The aim of this paper is to investigate effects of macromolecular structure and ionic competition phenomena induced by an increase of ionic strength on the dispersive action of new superplasticizers. These superplasticizers were synthesized and their structure is based on that of polycarboxylates. These superplasticizers are comb-like copolymers with phosphonic acids. Macromolecular parameters studied are the monomer repartition along the carbon backbone and the chain length. Ionic strength is increased either by adding sulfate or nitrate ions. The effects of these factors are then investigated using adsorption, stability and rheology results. It appears that statistical copolymers with phosphonic acids having the shortest chain length are the most efficient in terms of fluidity improvement even in the presence of sulfate or nitrate ions.

中文翻译：

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膦酸化梳状共聚物的合成及其在 CaCO 3 悬浮液中的分散效率评估第二部分：大分子结构和离子强度的影响

摘要 本文旨在研究由离子强度增加引起的大分子结构和离子竞争现象对新型减水剂分散作用的影响。这些超塑化剂是合成的，它们的结构基于聚羧酸盐的结构。这些超塑化剂是与膦酸的梳状共聚物。研究的大分子参数是单体沿碳主链的重新分配和链长。通过添加硫酸根或硝酸根离子来增加离子强度。然后使用吸附、稳定性和流变学结果研究这些因素的影响。即使在硫酸根或硝酸根离子存在的情况下，具有最短链长的膦酸的统计共聚物似乎在改善流动性方面是最有效的。