Study on the Performance of Polycarboxylate-based Superplasticizers Synthesized by Reversible Addition–fragmentation Chain Transfer (RAFT) Polymerization
作者：Binbin Yu1, Zhong Zeng2, Qinyu Ren1, Yang Chen1, Mei Liang1*, Huawei Zou1*
關鍵字：Polycarboxylate superplasticizer, RAFT polymerization, Cement, Mortar fluidity
論文來源：期刊
具體來源：Journal of Molecular Structure, 2016, 1120: 171-179.
發(fā)表時間：2016年
ABSTRACT: A series of block type polycarboxylate-based superplasticizers (PCs) with different molecular architectures were synthesized with macromonomer butenyl alkylene polyoxyethylene-polyoxypropylene ether (BAPP) and acrylic acid (AA) by reversible additionefragmentation chain transfer (RAFT) polymerization. Fourier-Transformed Infrared (FTIR) Spectroscopy and dynamic light scattering (DLS) were applied to investigate the PCs’ molecular structure. The dispersion capacity of the PCs in cement were also measured, and the results showed that the polycarboxylic dispersing agents prepared by this method were suitable for portlant cement. It was found that the PCs could affect the hydration process, which was performed through retarding the generation of ettringite in the hydrated product. Our studies with X-ray diffraction (XRD), scanning electron microscopy (SEM) and compressive strength measurement of hydrated production were all supporting this conclusion.