近年来，随着建筑行业对混凝土性能要求的逐年提高，聚羧酸减水剂（PCE）扮演着愈发重要的角色。然而，合成PCE所用的聚醚大单体的原料来源单一，合成手段繁琐苛刻，分子设计自由度低，这就迫切需要制备出新型品种的PCE，实现PCE结构的革命化、创新化，及合成工艺的便捷化和常规化。本项目将高分子的结构设计原理应用于混凝土化学外加剂领域，设计了“链转移法”和“端基官能化法”两种途径，开创性地合成一种全新聚乙烯醇侧链结构的PCE 材料，真正突破了PCE 的分子设计瓶颈。通过设计合成一系列不同结构变量的新型PCE并研究性能规律，实现结构-性能的可调控化，构建理想的分子结构模型，并通过微观构象尺寸及形态的研究深入揭示新型PCE在水泥浆体中的吸附行为和作用机理。所用合成方式常见、步骤简单、节能高效，研究结果还将进一步丰富分子结构设计理论和聚合物结构性能关系理论，创新性显著，对PCE基础研究有重要的指导作用。

In recent years, since the demand of concrete performance in construction industry has increased year by year, polycarboxylate superplasticizer (PCE) plays an important role in the preparation of high-performance concrete. However, the synthesis of macromonomer of PCE exhibited single material source, complicated process, and low design degree. This needs a novel type of PCE to achieve the structural revolution and innovation as well as the convenience and normalization of synthesis process. By applying the structural design theory of polymer to the field of concrete admixture, we designed the two methods of “chain transfer” and “end-functionalization”, and then a novel PCE with side chain of polyvinyl alcohol structure was innovatively synthesized, which can solve the problem indeed. The regulation of PCE structure-performance and construction of ideal molecular structure model can be achieved through the design and synthesis of a series of novel PCE with different structural parameters and their performances investigation. Furthermore, the adsorption behavior and mechanism of novel PCE in cement paste can be thoroughly described by investigating the microscopic conformation dimension and morphology. The synthesis method is simple and common, manifesting as energy conservation and high efficiency. The innovative research results will enrich the theory of molecular structure design and structure-performance relationship, and provide important guidance to fundamental research of PCE.