Synthesis and performances of polycarboxylate superplaticizer with clay-inerting and high slump retention capability

17th IUMRS International Conference in Asia

Qian, Shanshan^1 ; Jiang, Haidong^1 ; Ding, Bei^1 ; Wang, Yi^1 ; Zheng, Chunyang^1 ; Guo, Zhaolai^1

Jiangsu China Railway ARIT New Materials Co. Ltd., Jiangsu Nanjing

211505, China^1

关键词: Adsorption behavior;    Application performance;    Chain transfer agents;    Fourier transform infra red (FTIR) spectroscopy;    Free radical copolymerization;    Gel permeation chromatography (GPC);    Superplasticizers;    Vinyl-benzyl chlorides;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/182/1/012033/pdf
DOI  :  10.1088/1757-899X/182/1/012033

来源: IOP

【 摘 要 】

Macromolecules with pendant chlorine groups on their main chains were synthesized via free-radical copolymerization of 2-hydroxyethyl acrylate(HEA), TPEG and vinylbenzyl chloride(VBC) in the presence of intiator and chain transfer agent according to molecular structure design principle. The subsequent Arbuzov reaction between trimethoxyphosphine(TMP) and chlorine groups of macromolecules(PHVT) gave rise to new type of polycarboxylate superplaticizer with clay-inerting and high slump retention capability. The molecular structure of superplasticizer was determined by Fourier Transform Infrared Spectroscopy (FT-IR) and Gel Permeation Chromatography (GPC), respectively. The adaptability of clays, Zata potential, adsorption behavior and application performance in concrete were measured. The results shows that the polycarboxylate superplaticizer we prepared has good clay compatibility, excellent clay-inerting and high slump retention capability.