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首页> 外文期刊>Recent Patents on Chemical Engineering >Use of Non-Purified Polycarboxylate Ether (PCE) as Superplasti-cizer - Structural Determination and PCE/Cement Interaction
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Use of Non-Purified Polycarboxylate Ether (PCE) as Superplasti-cizer - Structural Determination and PCE/Cement Interaction

机译：使用非纯化的多羧酸醚（PCE）作为超级塑料 - Cizer - 结构测定和PCE /水泥相互作用

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摘要

Objective: Aim of this paper is to investigate the interactions between industrial-grade polycarboxylate ether (PCE) polymers and ordinary Portland cement to assess whether is possible to draw structure/performance relations for impure, yet fully characterized, polymers. Method: To this end thirteen PCE polymers were synthesised in industrial fashion, deeply analyzed and tested in cement paste. Chemical stability and adsorption behaviour have been evaluated through gel permeation chromatography technique, leading to insights regarding the plasticization timing and the adsorption control. Results: All the results were interpreted and critically discussed by invoking the characteristics of initial dispersers and workability retainers; furthermore a comprehensive description has been attempted through the Gay and Raphael conformation plot, based on the establishment of which molecular feature affects each step of the PCE's working mechanism. Conclusion: The results confirm many of the findings despite the imperfect nature of the chosen polymers and show that common impurities, such as unreacted side chains, do not noticeably interact with the binder. In particular it is clear that the limiting stage of the entire action lies on adsorption rate and occurrence, which seems to be ruled by the absolute value of charge per chain and by the conformation regime.
机译：目的：本文的目的是研究工业级多羧酸醚（PCE）聚合物和普通波特兰水泥之间的相互作用，以评估是否有可能借鉴纯度的结构/性能关系，但完全表征聚合物。方法：在该端，13CCE聚合物以工业方式合成，深入分析并在水泥浆中进行测试。通过凝胶渗透色谱技术评估了化学稳定性和吸附行为，导致关于塑化时序和吸附对照的见解。结果：通过调用初始分散液和可行性保持者的特征，解释并批评所有结果;此外，通过同性恋和Raphael构象绘制，基于该分子特征影响PCE的工作机制的每个步骤的建立，已经通过同性恋和拉斐尔构象图来了全面描述。结论：结果证实了许多结果尽管所选聚合物的不完美性质，并且表明常见的杂质如未反应的侧链，并不明显与粘合剂相互作用。特别是显然，整个动作的限制阶段是吸附速率和发生，这似乎被每个链条的绝对值和通过构象制度所统治。

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  • 作者

    Alessandro Russo; Andreas Schorer; Marco Rentsch;

  • 作者单位

    CEMEX Research Group AG Romerstrasse 13 2555 Brilggb. Biel Switzerland and2Dipartimento di Scienze Chimiche Universitd degli Studi di Napoli Federico II Complesso Universitario di Monte Sant'Angelo 80126 Napoli Italy;

    CEMEX Research Group AG Romerstrasse 13 2555 Brilggb. Biel Switzerland and2Dipartimento di Scienze Chimiche Universitd degli Studi di Napoli Federico II Complesso Universitario di Monte Sant'Angelo 80126 Napoli Italy;

    CEMEX Research Group AG Romerstrasse 13 2555 Brilggb. Biel Switzerland and2Dipartimento di Scienze Chimiche Universitd degli Studi di Napoli Federico II Complesso Universitario di Monte Sant'Angelo 80126 Napoli Italy;

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  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类 化学工业;
  • 关键词

    Adsorption; initial dispersers; ordinary portland cement; polycarboxylate ether; superplasti-cizers; workability retainers;

    机译：吸附;初始分散者;普通波特兰水泥;聚羧酸醚;Superplasti-cizers;可加工性保留;

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