Polycarboxylate type superplasticizers (PCEs) typically exhibit strong foaming action. In this study, a non-air entraining polycarboxylate polymer was prepared by grafting polyether amine pendant chains onto a MPEG PCE structure. The molecular properties, such as molar masses (M_w, M_n), the polydispersity index (PDI), and the conversion rate, were obtained via Size Exclusion Chromatography (SEC). The structure of the synthesized PCE polymers was further confirmed via ¹H NMR and FTIR Spectrometry. Thereafter, the foaming behavior of the modified PCE polymer was investigated and compared to that of a conventional MPEG PCE polymer. The results of a series of mortar tests revealed that the modified PCE polymer did not entrain air, whereas the conventional MPEG PCE sample developed a high air content of 14.0 vol%. Furthermore, isothermal heat flow calorimetric results and XRD analysis suggested that the modified PCE polymer promoted cement hydration, which in turn accelerated the development of compressive strength.

聚羧酸盐类减水剂 (PCE) 通常表现出强烈的发泡作用。在这项研究中，通过将聚醚胺侧链接枝到 MPEG PCE 结构上来制备非引气聚羧酸盐聚合物。通过尺寸排阻色谱 (SEC) 获得分子性质，例如摩尔质量 ( M _w , M _n )、多分散指数 (PDI) 和转化率。通过^{1进一步证实了合成的 PCE 聚合物的结构}H NMR和FTIR光谱法。此后，研究了改性 PCE 聚合物的发泡行为，并将其与常规 MPEG PCE 聚合物的发泡行为进行了比较。一系列砂浆测试的结果表明，改性 PCE 聚合物不会夹带空气，而传统 MPEG PCE 样品的空气含量高达 14.0 vol%。此外，等温热流量热结果和XRD分析表明，改性PCE聚合物促进了水泥水化，进而加速了抗压强度的发展。