Abstract EPEG (ethylene-glycol monovinyl polyethylene glycol)-AA (acrylic acid) copolymerization is a typical representative of free radical copolymerization for the preparation of PCs that has been discussed and used increasingly in recent years. The calculation of the reactivity ratio can be used for the analysis of the monomers reactivity, which is of great significance to the study of copolymerization process. In this paper, combined with GPC test results, the monomer reactivity ratios in EPEG-AA copolymerization were calculated with the linear (Fineman–Ross, YBR, Kelen–Tüdös) methods and the nonlinear least square method, and the uncertainty of the methods were calculated. In addition, it has been found that compared with the widely used IPEG (isobutylene polyethylene glycol)-AA copolymerization, the monomer activity of EPEG is higher and closer with AA, so the copolymerization efficiency should be higher. This problem has been verified by experimental results, and the unity of theory and experiment has been realized. At the same time, the experimental results show that the PCs prepared by EPEG macromonomers have better dispersion of cement paste. To sum up, EPEG macromonomer will be more widely used in the future. Graphical Abstract

中文翻译：

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EPEG-AA（乙二醇单乙烯基聚乙二醇-丙烯酸）共聚体系单体反应比及性能研究

摘要 EPEG（乙二醇单乙烯基聚乙二醇）-AA（丙烯酸）共聚是制备PCs的自由基共聚的典型代表，近年来被越来越多地讨论和使用。反应性比的计算可用于分析单体的反应性，对共聚过程的研究具有重要意义。本文结合 GPC 测试结果，采用线性（Fineman-Ross、YBR、Kelen-Tüdös）方法和非线性最小二乘法计算了 EPEG-AA 共聚中的单体反应率，方法的不确定度为计算。此外还发现，与广泛使用的IPEG（异丁烯聚乙二醇）-AA共聚相比，EPEG的单体活性较高且与AA接近，因此共聚效率应较高。该问题已得到实验结果的验证，实现了理论与实验的统一。同时，实验结果表明，EPEG大分子单体制备的PCs具有更好的水泥浆分散性。综上所述，EPEG大分子单体在未来将得到更广泛的应用。图形概要